Coating management device and coating management system

Abstract

The coating management device makes it possible to estimate the material of the coating applied to a workpiece. In order to manage the coating, it is necessary to know the material of the coating, but even if you forget to input it when painting, it is possible to automatically estimate and store the material of the coating. [Solution] The coating film management device comprises a wireless communication device that is fixed to a workpiece and covered by a coating film, and a receiver for communicating with the wireless communication device via radio waves of two or more frequencies. The wireless communication device has an antenna that receives radio waves emitted from the receiver, a control circuit that is powered from the radio waves, and a memory that stores the estimated material of the coating film. The receiver has a transceiver unit that communicates with the wireless communication device and sends and receives data, a measuring unit that measures the radio wave intensity for each frequency of the radio waves received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measuring unit.

Description

[Technical field]

[0001] The present disclosure relates to a coating film management device and a coating film management system. [Background technology]

[0002] Buildings and other structures, bridges and other structures (hereinafter, buildings and structures are collectively referred to as "structures") are constantly exposed to rain, wind, ultraviolet rays, etc., so they are painted and a coating is formed not only from the viewpoint of aesthetics, but also from the viewpoint of protecting the structure. However, because the coating is formed in the place most susceptible to the effects of rain, wind, and ultraviolet rays, it deteriorates over time, and if this deterioration is left unchecked, it will hasten the deterioration of the structure itself. Therefore, it is desirable to detect the deterioration of the coating at the appropriate time and repaint it.

[0003] From this perspective, it is desirable to automatically manage the coating film applied to the workpiece using a system or the like so that appropriate repairs can be made at the appropriate time. For example, a small wireless communication device can be provided between the workpiece and the coating film, and information about the coating film can be stored in the wireless communication device, which can be used to analyze and check the deterioration of the coating film. In addition, as a prerequisite for analyzing and checking the deterioration of the coating film, it is important to know what material the coating film is made of, and it is desirable to automatically detect this using a system or the like.

[0004] From the viewpoint of identifying materials, for example, Patent Document 1 discloses an identification device that uses infrared rays to identify plastic materials. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-074151 A Summary of the Invention [Problem to be solved by the invention]

[0006] Although there is technology for identifying materials using infrared rays, such as that described in Patent Document 1, if it were possible to identify materials using a wireless communication device installed between the workpiece and the coating, it would be useful because it would be possible to realize both a mechanism for storing information and a mechanism for identifying the material.

[0007] In addition, in order to identify materials using a wireless communication device, it is useful to use radio waves to identify materials.

[0008] The present disclosure has been proposed in consideration of the above-mentioned problems, and aims to provide a coating management device that is capable of measuring and identifying the material of a coating applied to a workpiece using radio waves at multiple frequencies, and also managing the information. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the coating film management device of the present disclosure comprises a wireless communication device that is fixed to a workpiece and covered by a coating film, and a receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device having an antenna that receives radio waves emitted from the receiver, a control circuit that is powered from the radio waves, and a memory that stores the estimated material of the coating film, and the receiver has a transceiver unit that communicates with the wireless communication device and transmits and receives data, a measuring unit that measures the radio wave intensity for each frequency of the radio waves received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measuring unit.

[0010] In order to achieve the above-mentioned objective, the coating film management system of the present disclosure comprises a plurality of wireless communication devices fixed to a workpiece and covered by a coating film, and a receiver for communicating with the wireless communication devices via radio waves of two or more frequencies, the wireless communication device having an antenna for receiving radio waves emitted from the receiver, a control circuit powered by the radio waves, and a memory for storing the estimated material of the coating film, and the receiver has a transceiver unit for communicating with the wireless communication devices and transmitting and receiving data, a measuring unit for measuring the radio wave intensity for each frequency of the radio waves received from the wireless communication devices, and a material estimation unit for estimating the material of the coating film using the radio wave intensity measured by the measuring unit. Effect of the Invention

[0011] According to the present disclosure, by installing a wireless device for managing a coating film underneath a coating film applied to a workpiece, it is possible to easily manage deterioration of the coating film. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an overview of a coating film management device 10. [Diagram 2] 1 is a diagram illustrating a hardware configuration of a wireless communication device 100. [Diagram 3] FIG. 1 is a block diagram showing basic functions of a wireless communication device 100. [Figure 4] 2 is a diagram showing an example of the contents stored in a coating DB 121 of a storage unit 120 of a wireless communication device 100. FIG. [Diagram 5] FIG. 2 is a diagram showing a hardware configuration of a receiver 200. [Figure 6] FIG. 2 is a block diagram showing basic functions of a receiver 200. [Figure 7] 2 is a diagram showing an example of the contents stored in a material DB 221 of a storage unit 220 of a receiver 200. FIG. [Figure 8] FIG. 2 is a diagram showing an example of a method for installing a receiver 200 when measuring a film thickness. [Figure 9] 13 is a flowchart showing an example of a control process performed by the receiver 200 when performing material estimation. [Figure 10]FIG. 1 is a diagram showing a specific configuration of a coating film management system 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the embodiments described below do not unduly limit the contents of the present disclosure described in the claims. In addition, not all components shown in the embodiments are necessarily essential components of the present disclosure.

[0014] (Overall configuration of coating film management device 10) 1 is a diagram showing an overview of a coating film management device 10. The coating film management device 10 is composed of a wireless communication device 100 and a receiver 200. The wireless communication device 100 is installed between a workpiece 300 and paint 400. Specifically, the wireless communication device 100 is fixed to the workpiece 300 with double-sided tape, adhesive, or the like, and the paint 400 is applied thereon to form a coating film. By applying the paint 400, the wireless communication device 100 can be protected from rain, wind, ultraviolet rays, and the like.

[0015] The wireless communication device 100 can be configured with a circuit called an RFID (Radio Frequency Identification), an RF tag, an IC tag, a wireless tag, or the like. The wireless communication device 100 is fixed to the workpiece 300, and is installed covered with paint by applying paint thereon. The wireless communication device 100 receives radio waves emitted from the receiver 200, supplies power, and performs wireless communication with the receiver 200. The wireless communication device 100 can be installed between the workpiece 300 and the paint 400 by configuring it with a small circuit such as an RFID, and thus the wireless communication device 100 is protected from rain, wind, and ultraviolet rays. Furthermore, the wireless communication device 100 can be set without affecting aesthetics.

[0016] The receiver 200 transmits radio waves to the wireless communication device 100 and performs wireless communication. The receiver 200 is installed on the paint applied to the wireless communication device 100 or away from the paint so that the receiver 200 can measure radio waves that have passed through the paint. The receiver 200 measures the intensity of the radio waves received from the wireless communication device 100, reads out data stored in the memory 103 of the wireless communication device 100, and stores the data in the memory 103 of the wireless communication device 100. It is preferable to install the receiver 200 so that the distance between the wireless communication device 100 and the wireless communication device 100 is always kept constant. This is because, as described later, by keeping the distance between the receiver 200 and the wireless communication device 100 constant, the receiver 200 can accurately measure the intensity of the radio waves emitted from the wireless communication device 100.

[0017] The workpiece 300 is a structure such as a building, a bridge, a steel tower, or the like, which is fixed to the ground and to which paint is to be applied.

[0018] The paint 400 is applied to the workpiece 300 and is made of a material that adheres to the workpiece 300 when it dries, and is formulated not only with materials intended to beautify the workpiece 300, but also with materials intended to protect the workpiece 300, such as waterproofing materials.

[0019] (Description of Wireless Communication Device 100) 2 is a diagram showing a hardware configuration of wireless communication device 100. Wireless communication device 100 includes antenna 101, control circuit 102, and memory 103. In addition to these, wireless communication device 100 may also include a CPU (Central Processing Unit) and a volatile memory.

[0020] The antenna 101 transmits or receives radio waves in order to perform wireless communication with the receiver 200. The antenna 101 is configured to be capable of transmitting radio waves of two or more different frequencies.

[0021] The control circuit 102 is a circuit for controlling the wireless communication device 100. For example, it includes a circuit for modulating and demodulating radio waves transmitted and received by the antenna 101, a circuit for supplying power from radio waves received by the antenna 101, a circuit for reading data from the memory 103, and a circuit for writing data to the memory 103.

[0022] The control circuit 102 is connected to the antenna 101, demodulates radio waves received by the antenna 101, and modulates data to transmit it via the antenna 101. The control circuit 102 is also connected to a memory 103, and writes data to the memory 103 and reads data from the memory 103.

[0023] The memory 103 stores data. The data stored in the memory 103 includes measured radio wave intensity, etc. The memory 103 is realized by a non-volatile memory, and retains the stored data even if the power is cut off.

[0024] Although details will be described later, by providing a memory 103 in the wireless communication device 100, it becomes possible to store data relating to the workpiece 300 on the workpiece 300.

[0025] 3 is a block diagram for explaining basic functions of wireless communication device 100. Wireless communication device 100 includes a communication unit 110, a storage unit 120, and a control unit .

[0026] The communication unit 110 performs processing for communicating with the receiver 200. For example, the communication unit 110 communicates with the receiver 200, and transmits data such as the measurement date and time and the film thickness read from the storage unit 120 via the control unit 130 to the receiver 200. In addition, for example, the communication unit 110 communicates with the receiver 200, and receives data such as the material, the measurement date and time, and the radio wave intensity for each frequency from the receiver 200, and stores the data in the storage unit 120.

[0027] The storage unit 120 stores data held by the wireless communication device 100. For example, the storage unit 120 stores data such as the measurement date and time, the measured radio wave intensity for each frequency, the film thickness, the material of the coating, etc. In addition, the storage unit 120 may store location information and an identifier (ID) related to the location where the measurement was performed.

[0028] Providing the wireless communication device 100 with the storage unit 120 allows data to be stored together with the structure 300, rather than in a system or medium separate from the structure 300. Since the structure 300 generally lasts for several decades until it is demolished and its role is completed, there is a risk of data loss if the data is stored in a separate system or device. By storing data in the wireless communication device 100 installed together with the structure 300 as in the present disclosure, it becomes possible to manage the data without data loss even if the manager, owner, etc. are changed.

[0029] The control unit 130 controls the operation of the wireless communication device 100 by the control circuit 102 of the wireless communication device 100. Specifically, the control unit 130 includes a circuit for supplying power to the wireless communication device 100 by using electromagnetic induction of radio waves received by the antenna 101. The control unit 130 also demodulates data received by the communication unit 110 from the receiver 200, and modulates data for the communication unit 110 to transmit to the receiver 200. The control unit 130 also reads information such as the measurement date and time and film thickness from the storage unit 120, or writes and stores information such as the measurement date and time, radio wave intensity for each frequency, film thickness, and material of the coating in the storage unit 120.

[0030] Supplying power using electromagnetic induction of radio waves received by the antenna 101 has the advantage that it eliminates the need for a power storage device or wiring for power supply and allows for miniaturization, making it easy to install the wireless communication device 100 inside the paint 400.

[0031] (Specific examples of data stored in wireless communication device 100) The memory unit 120 may store the time (temporal information such as date and time) when the workpiece was completed (when the coating was applied), the material, the film thickness when completed (when the coating was applied), the radio wave intensity for each frequency of the radio waves received by the receiver 200 from the wireless communication device 100, the measured film thickness, the date and time of measurement, etc. In addition, the memory unit 120 may store location information and an identifier (ID) relating to the place where the measurement was performed, or may store some of these elements. However, it is not essential that these data are stored.

[0032] Furthermore, when multiple wireless communication devices 100 are installed within the structure 300, the storage unit 120 may store not only information on the location where the wireless communication device 100 is installed, but also information on the locations where other wireless communication devices 100 installed in the structure 300 are installed. At this time, by storing the information together with information such as location information or an identifier, it is possible to identify which wireless communication device 100 the information pertains to. By storing information in multiple wireless communication devices 100 in this way, it is possible to obtain the information from the other wireless communication devices 100 in the unlikely event that the information is lost.

[0033] 4 shows specific contents stored in the coating DB 121 of the storage unit 120. It shows that on October 1, 2000, when the workpiece was completed, the coating thickness was 2 mm, the material was A, and the radio wave intensity of the radio waves received by the receiver 200 from the wireless communication device 100 was 250 mW at both 900 MHz and 2.45 GHz.

[0034] The memory unit 120 stores the date and time when the workpiece is completed (when the coating is applied), the material, and the coating thickness, making it possible to refer to the data even if the owner or manager is changed, or the workpiece-related materials are lost. Furthermore, in the present disclosure, by storing the radio wave intensity and coating thickness observed at multiple frequencies when the workpiece is completed (when the coating is completed), it is possible to automatically estimate the material and add the material even if it is not stored. This makes it possible to analyze the degree of deterioration of the coating.

[0035] (Description of receiver 200) 5 is a diagram showing a hardware configuration of receiver 200. Receiver 200 can be configured using a general-purpose computer.

[0036] As shown in FIG. 5, the receiver 200 includes a processor 201, a memory 202, a storage 203, a communication IF 204 (note that IF is written as an abbreviation of Interface), and an input / output IF 205.

[0037] The processor 201 is hardware for executing an instruction set described in a program, and is composed of an arithmetic unit, a register, a peripheral circuit, and the like. The memory 202 is for temporarily storing programs and data processed by the programs, and is realized by a volatile memory such as a dynamic random access memory (DRAM). The storage 203 is a storage device for saving data such as programs, and is realized by a flash memory, a solid state drive (SSD), or a hard disk drive (HDD). The communication IF 204 is an interface for transmitting and receiving signals so that the receiver 200 communicates with the wireless communication device 100. For example, the communication IF 204 includes an interface for transmitting and receiving signals for reading data and signals for writing data between the wireless communication device 100. The input / output IF 205 functions as an interface for input devices such as a keyboard, mouse, and numeric keypad for receiving input from a user, and an interface for an output device such as a display for presenting information to a user.

[0038] 6 is a block diagram for explaining basic functions of receiver 200. Receiver 200 includes a communication unit 210, a storage unit 220, and a control unit 230.

[0039] The communication unit 210 performs processing for communicating with the wireless communication device 100. For example, the communication unit 210 of the receiver 200 performs wireless communication with the wireless communication device 100, and acquires data such as the measurement date and time, the radio wave intensity for each frequency, the film thickness, and the material stored in the wireless communication device 100 via the communication unit 110 of the wireless communication device 100, and / or transmits the data via the communication unit 110.

[0040] The storage unit 220 includes a material DB 221 that stores information on the characteristics of paint, such as the transmittance of the paint material for each frequency. The storage unit 220 also stores data and programs used by the receiver 200.

[0041] 7 shows a specific example of the material DB 221. The material DB 221 stores the transmittance for each frequency for each material. Two or more frequencies are used, and the transmittance of the frequency used for material estimation is stored. For example, material 1 indicates that the transmittance of frequency f1 is 0.92 and the transmittance of frequency f2 is 0.90.

[0042] The control unit 230 is realized by the processor 201 of the receiver 200 reading a program stored in the storage unit 220 and executing instructions included in the program. The control unit 230 controls the operation of the receiver 200. Specifically, the control unit 230 fulfills the functions of a transmission / reception unit 231, a measurement unit 232, and a material estimation unit 233.

[0043] The transmitting / receiving unit 231 communicates with the wireless communication device 100 via the communication unit 210, and receives and acquires data such as the measurement date and time, the radio wave intensity for each frequency, the film thickness, and the material stored in the wireless communication device 100. The transmitting / receiving unit 231 may also have a function of displaying the acquired data via the input / output IF 205.

[0044] The transmitter / receiver unit 231 communicates with the wireless communication device 100 via the communication unit 210, transmits data input via the input / output IF 205 and data calculated and / or identified by other functions of the control unit 230 to the wireless communication device 100, and stores the data in the memory unit 120 of the wireless communication device 100.

[0045] The measuring unit 232 measures the radio wave intensity of radio waves emitted from the antenna 101 of the wireless communication device 100 via the communication unit 210. The communication unit 210 is capable of measuring radio wave intensity at two or more frequencies, and the measuring unit 232 measures the intensity of radio waves emitted from the antenna 101 of the wireless communication device 100 for each frequency. At this time, the measured radio wave intensity may be stored in the storage unit 120 of the wireless communication device 100 via the communication unit 210 together with information on the measurement date and time, such as temporal information at the time of measurement, and frequency information.

[0046] The measuring unit 232 stores the time information and radio wave intensity at the time of measurement together in the memory unit 120 of the wireless communication device 100 via the communication unit 210, and is thereby able to analyze these data and analyze the time elapsed since the completion of the workpiece and the transition of the radio wave intensity. In addition, the measuring unit 232 is able to analyze the coating film by measuring the radio wave intensity for each frequency. Specifically, when the material information is not stored, the material of the coating film is estimated using the radio wave intensity for each frequency and the film thickness information.

[0047] The material estimation unit 233 estimates the material of the coating of the paint 400 placed on the wireless communication device 100 using the radio wave intensity for each frequency and the coating thickness measured by the measurement unit 232.

[0048] The material estimation unit 233 may perform the following process, for example. The radio wave intensity of frequency fk emitted from wireless communication device 100 is Pk0, the film thickness is d, the radio wave intensity of frequency fk measured by measuring unit 232 of receiver 200 is Pk, and the transmittance of frequency fk of a certain material M is TMk. Then, the measured radio wave intensity Pk of frequency fk can be expressed by a model such as the following equation 1.

number

[0049] When [Equation 1] is transformed to show TMk, it becomes [Equation 2].

number

[0050] The material estimation unit 233 can obtain the transmittance T=(T1, T2, ..., Tn) for each frequency by using Pk observed by the measurement unit 232, the radio wave intensity Pk0 emitted from the wireless communication device 100, and the film thickness d. Therefore, the material estimation unit 233 can determine which is closest to the TM of the material M registered in the material DB 221, and determine the material M.

[0051] (Material Estimation Method 1) The material estimation unit 233 may, for example, calculate the sum of the differences between T, whose elements are the transmittance for each frequency, and TM, whose elements are the transmittance for each frequency of the material M, and select the one with the smallest difference as the material.

[0052] In other words, the DM of material M (the sum of the magnitudes of the differences between the calculated transmittance at each frequency, T, and the transmittance at each frequency, TM, which indicates the transmittance at each frequency of each material) can be calculated using an equation such as [Equation 3], and the material M with the smallest DM can be estimated as the material of the coating applied to wireless communication device 100.

number

[0053] By estimating the material using the above-mentioned formula, the material estimation unit 233 is able to estimate the material based on information regarding the transmittance of the material for each frequency and information regarding the measured radio wave intensity, without the need for a complex mechanism.

[0054] (Material Estimation Method 2) For example, the material estimation unit 233 may regard T and TM as vectors, respectively, and the cosine similarity as the similarity between the two, and estimate the most similar material. When the cosine similarity between vectors A and B is cos(A,B), the cosine similarity between T and material TM is calculated as cosM(T,TM). Since the cosine similarity is a value of 1 or less, the material M of TM for which cosM(T,TM) is the largest value may be estimated to be paint applied on the wireless communication device 100.

[0055] The material estimation unit 233 can estimate the material based on information on the transmittance of the material for each frequency and information on the measured radio wave intensity. In particular, the more frequencies to be measured (greater than two), the more accurate the estimation can be expected.

[0056] (Material Estimation Method 3) The material estimation unit 233 may estimate the material using, for example, machine learning. For machine learning, for example, a neural network may be used. At this time, as learning data, T having elements of multiple frequencies calculated from measured data for various materials is collected. Then, a learning model is generated for each material, and the label of a correct material is set to 1 and the label of an incorrect material is set to 0. When there are J materials, J learning models are prepared. Each learning model is denoted as L1, L2, ... LJ.

[0057] When the material estimation unit 233 obtains T having elements of multiple frequencies based on observed data, it may input T to the models L1, L2, ..., LJ, and estimate the material corresponding to the model with the largest value as the paint applied to the wireless communication device 100. This is because, in each learning model, the one closest to 1 is estimated to be closest to the correct answer.

[0058] The material estimation unit 233 is expected to achieve more accurate material estimation by estimating the material using machine learning, particularly by acquiring a large amount of learning data and increasing the number of frequencies to be measured to more than two.

[0059] (Specific examples of material estimation) A specific example of material estimation is shown below. The material estimation unit 233 calculates the transmittance based on [Equation 2] using, for example, the observed film thickness, the transmitted radio wave intensity, and the observed radio wave intensity. It is assumed that the calculated transmittance is 0.93 at frequency f1 and 0.89 at frequency f2. In estimation method 1, the material DB 221 estimates the material with the smallest total difference for each frequency based on an equation such as [Equation 3]. If the material DB 221 is defined as shown in FIG. 7, the difference for material 1 is 0.02, the difference for material 2 is 0.12, the difference for material 3 is 0.03, and the difference for material N is 0.37, so material 1 is estimated as the material of the coating film.

[0060] Next, in estimation method 2, the material is estimated using the cosine similarity by considering the frequency transmittance as a vector as an element. In this way, the cosine similarity with material 1 is 0.99994, the cosine similarity with material 2 is 0.999759, the cosine similarity with material 3 is 0.999868, and the cosine similarity with material N is 0.998407, so material 1, which has the greatest cosine similarity, is estimated to be the material of the paint film.

[0061] In the case of estimation method 3, a learning model is prepared for each material using the transmittance actually observed for each material. A correct label (1) is assigned to the correct material, and an incorrect label (0) is assigned to the incorrect material, and a learning model for each material is constructed. The actually observed transmittance is input into each of the learning models, from 1 to N, and the material of the learning model that obtains the output closest to the correct answer (closest to 1) is estimated as the material of the coating.

[0062] (How to Install the Receiver 200 for Measuring Radio Field Intensity) Since receiver 200 identifies the material of the coating film using the radio wave intensity emitted from wireless communication device 100, correct coating film management cannot be achieved if the position of receiver 200 changes each time. Therefore, it is desirable to install receiver 200 in the same position for each measurement.

[0063] Fig. 8 shows an example of a method for installing the receiver 200 when estimating the material of a paint film. As shown in Fig. 8, it is preferable to install a sensor portion for estimating the material of a paint film as a probe 240 and measure the radio wave intensity by bringing the probe 240 into contact with the paint 400. Note that the radio wave intensity may be measured by bringing the radio wave transmitting / receiving portion of the receiver 200 into contact with the paint 400 without installing the probe 240.

[0064] Furthermore, although the wireless communication device 100 has a fixed surface, if the distance between the radio wave transmitting / receiving unit of the receiver 200 (the probe 240 when the probe 240 is installed) and the antenna 101 of the wireless communication device 100 varies for each measurement, the radio wave intensity cannot be measured correctly. Therefore, for example, the radio wave transmitting / receiving unit of the receiver 200 (the probe 240 when the probe 240 is set) may be attached to wheels so that the radio wave intensity can be measured while being in contact with the paint 400, and the radio wave transmitting / receiving unit of the receiver 200 (the probe 240 when the probe 240 is set) may be moved evenly around the antenna 101 of the wireless communication device 100, and the film thickness may be measured with the strongest radio wave intensity as the measured value.

[0065] Furthermore, for example, rails for moving the radio wave transmitting / receiving section of receiver 200 (probe 240 if probe 240 is set) may be installed on the paint covering wireless communication device 100. Receiver 200 may be configured to receive radio waves from wireless communication device 100 and measure radio wave intensity while in contact with paint 400, with the strongest value of radio wave intensity being the measured value. Installing rails allows measurements to be made on the same track, thereby improving the accuracy of estimating the material of the paint film.

[0066] The method of installing receiver 200 is not limited to the above. For example, the installation position of receiver 200 may be determined in advance and the radio wave intensity may always be measured from that position, or the radio wave intensity may be measured while in contact with paint 400 by a method other than the above.

[0067] (Processing flow) Hereinafter, an example of a control process executed by the receiver 200 for estimating the material of a paint film will be described with reference to FIG.

[0068] The control unit 230 of the receiver 200 acquires film thickness information from the wireless communication device 100 via the communication unit 210 (step S101).

[0069] Control unit 230 of receiver 200 measures the radio wave intensity for each frequency of the radio waves emitted from wireless communication device 100 via communication unit 210 (step S102).

[0070] Control unit 230 of receiver 200 estimates the material using the measured radio wave intensities in a plurality of frequency bands, and information such as film thickness and transmittance for each material (step S103).

[0071] (Explanation of effect) The configuration of the coating film management device 10 has been described above, but by using the wireless communication device 100, it is possible to store data in the workpiece 300. As a result, even if the manager or owner of the workpiece 300 is changed and materials and data are not properly handed over, it is possible to grasp information on the film thickness at the time of construction and the material of the paint 400, because the data is stored in the wireless communication device 100 installed on the workpiece 300. Furthermore, storing information in the wireless communication device 100 present on the workpiece can be useful for analyzing deterioration of the coating film, etc.

[0072] Furthermore, in order to obtain data from the wireless communication device 100, communication using radio waves is required. However, by using these radio waves for coating film management as well, it is not necessary to use a separate mechanism for coating film thickness measurement, such as a method using ultrasonic waves or electric current, and it is possible to estimate the material of the paint 400 with a simple configuration.

[0073] In principle, the material of the paint film should be stored as data when painting is completed, but if this is forgotten, the paint can be automatically estimated and the material stored as in this embodiment, which can be useful for estimating the paint film thickness in the future and analyzing the degree of deterioration.

[0074] (Paint film management system) The coating film management device 10 may include a plurality of wireless communication devices 100 and a single or a plurality of receivers 200, and may be configured as a coating film management system 1.

[0075] 10 shows a configuration diagram of the coating management system 1. For example, the coating management system 1 is made up of a plurality of wireless communication devices 100-1 to 100-N and a receiver 200. Note that the number of receivers 200 may be one or more.

[0076] Receiver 200 is capable of communicating with wireless communication devices 100-1 to 100-N, and by communicating with wireless communication devices 100-1 to 100-N, measures the material of the coating film and stores the material data in wireless communication devices 100-1 to 100-N, respectively. This makes it possible to store material data for each location in wireless communication device 100.

[0077] Furthermore, wireless communication devices 100-1 to 100-N may store not only data related to the material at the corresponding location, but also material data related to other wireless communication devices 100 in workpiece 300.

[0078] The wireless communication devices 100-1 to 100-N also store material data related to the other wireless communication devices 100, so that even if data of a certain wireless communication device 100-K is lost, the data can be restored from the other wireless communication device 100-L. In particular, in the case of a structure 300 installed outdoors, depending on the location, deterioration due to the effects of ultraviolet rays, rain, wind, etc. is likely to occur and data may be lost, so this type of redundant configuration makes it possible to protect the data.

[0079] Although the description of the embodiment is finished above, the above embodiment is merely an example, and therefore the specific configurations and processing contents of the coating management system 1, the wireless communication device 100, and the receiver 200 are not limited to those described in the above embodiment.

[0080] Although the preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to such a specific embodiment, and the present disclosure includes the invention described in the claims and its equivalents. In addition, the configurations of the devices described in the above embodiments and modifications can be combined as appropriate as long as no technical contradiction occurs. [Explanation of symbols]

[0081] 1...coating management system, 10...coating management device, 100, 100-1 to 100-N...wireless communication device, 101...antenna, 102...control circuit, 103...memory, 110...communication unit, 120...storage unit, 121...coating DB, 130...control unit, 200...receiver, 201...processor, 202...memory, 203...storage, 204...communication IF, 205...input / output IF, 210...communication unit, 220...storage unit, 221...material DB, 230...control unit, 231...transmitting / receiving unit, 232...measuring unit, 233...material estimation unit, 240...probe, 300...workpiece, 400...paint, NW...network

Claims

1. A device for managing a coating film of a paint applied to a workpiece, comprising: a wireless communication device fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing the estimated material of the coating film; The receiver is a coating film management device having a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio waves received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measurement unit.

2. A device for managing a coating film of a paint applied to a workpiece, comprising: a wireless communication device fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing the estimated material of the coating film; the receiver has a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio wave received from the wireless communication device, and a material estimation unit that estimates a material of the coating film using the radio wave intensity measured by the measurement unit; The material estimation unit selects the material for which the sum of the difference between the transmittance for each frequency calculated using the radio wave intensity and film thickness and the transmittance for each frequency of each material is the smallest, and estimates the selected material as the material of the paint.

3. A device for managing a coating film of a paint applied to a workpiece, comprising: a wireless communication device fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing the estimated material of the coating film; the receiver has a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio wave received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measurement unit; The material estimation unit is a coating film management device that estimates, as the material of the applied paint, the material that exhibits TM that has the largest cosine similarity between T, which is expressed as a vector with elements of the transmittance for each frequency calculated using the radio wave intensity and film thickness, and TM, which is expressed as a vector with elements of the transmittance for each frequency for each material.

4. A device for managing a coating film of a paint applied to a workpiece, comprising: a wireless communication device fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing the estimated material of the coating film; the receiver has a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio wave received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measurement unit; The material estimation unit uses data whose elements are the transmittance for each frequency calculated using radio wave intensity and film thickness as learning data, and when the data whose elements are the transmittance for each frequency calculated using the radio wave intensity and film thickness are input into a machine learning model, the coating film management device estimates the material that is closest to the correct answer output from the machine learning model as the material of the applied paint.

5. A system for managing a coating of paint applied to a workpiece, comprising: a plurality of wireless communication devices fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing the estimated material of the coating film; The receiver is a coating film management system having a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio waves received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measurement unit.

6. A system for managing a coating of paint applied to a workpiece, comprising: a plurality of wireless communication devices fixed to the workpiece and covered by the coating; A receiver for communicating with the wireless communication device via radio waves of two or more frequencies, the wireless communication device has an antenna for receiving the radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing information including the estimated material of the coating film and the material of the coating film on a wireless communication device other than the wireless communication device; The receiver is a coating film management system having a transceiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity for each frequency of the radio waves received from the wireless communication device, and a material estimation unit that estimates the material of the coating film using the radio wave intensity measured by the measurement unit.

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