Coating film management device and coating film management system

Abstract

To address the necessity of acquiring a material of a coating film for coating film management by providing a coating film management device enabling estimation of the material of the coating film applied to workpiece and capable of automatically estimating and storing the material of the coating film when a user forgets to input the material during coating.SOLUTION: A coating film management device comprises a wireless communication device fixed to workpiece and covered with a coating film, and a receiver for communicating with the wireless communication device via radio waves of two or more frequencies, where the wireless communication device includes an antenna for receiving radio waves emitted from the receiver, a control circuit for supplying power from the radio waves, and a memory for storing an estimated material of the coating film, where the receiver includes a transmitting / receiving unit for communicating with the wireless communication device to transmit / receive data, a measuring unit for measuring radio wave intensity for every frequency of the radio waves received from the wireless communication device, and a material estimation unit for estimating the material of the coating film using the radio wave intensity measured by the measuring unit.SELECTED DRAWING: Figure 1

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 elements such as rain, wind, and ultraviolet rays, so they are painted to form a coating not only for aesthetic reasons but also to protect the structure. However, because the paint film is formed in areas most susceptible to the effects of rain, wind, and ultraviolet rays, it deteriorates over time, and if this deterioration is left unchecked, it will accelerate the deterioration of the structure itself. Therefore, it is desirable to detect paint film deterioration at the appropriate time and repaint.

[0003] From this perspective, it is desirable to be able to automatically manage the paint film applied to a workpiece using a system or the like so that appropriate repairs can be made at the appropriate time. For example, by installing a small wireless communication device between the workpiece and the paint film and storing information about the paint film in the wireless communication device, this information can be used to determine and analyze the deterioration of the paint film. Furthermore, as a prerequisite for determining and analyzing the deterioration of the paint film, it is important to understand what material the paint film is made of, and it would be desirable for this to be automatically detected by a system or the like.

[0004] From the viewpoint of material identification, 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] Japanese Patent Application Laid-Open No. 2004-074151 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 materials.

[0007] Furthermore, in order to identify materials using a wireless communication device, it is useful to use radio waves that can be communicated 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 can measure and identify the material of a coating applied to a workpiece using radio waves at multiple frequencies, and can also manage 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 the radio waves emitted from the receiver, a control circuit that is powered by 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 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.

[0010] In order to achieve the above-mentioned object, the coating film management system of the present disclosure comprises a plurality of wireless communication devices fixed to a workpiece and covered with a coating film, and a receiver for communicating with the wireless communication devices via radio waves of two or more frequencies, the wireless communication devices 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 coating film material, and the receiver has a transceiver unit for communicating with the wireless communication devices and sending 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 coating film material using the radio wave intensity measured by the measuring unit. [Effects of the Invention]

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

[0012] [Figure 1] 1 is a diagram showing an overview of a coating film management device 10. FIG. [Figure 2] 1 is a diagram illustrating a hardware configuration of a wireless communication device 100. FIG. [Figure 3] 1 is a block diagram showing basic functions of a wireless communication device 100. FIG. [Figure 4] 1 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. [Figure 5] FIG. 2 is a diagram illustrating a hardware configuration of a receiver 200. [Figure 6] FIG. 2 is a block diagram showing the 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] 10 is a flowchart showing an example of a control process when receiver 200 performs material estimation. [Figure 10]1 is a diagram showing a specific configuration of a coating film management system 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[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 content of the present disclosure described in the claims. Furthermore, not all of the components shown in the embodiments are necessarily essential components of the present disclosure.

[0014] (Overall configuration of coating film management device 10) FIG. 1 is a diagram showing an overview of a coating film management device 10. The coating film management device 10 is made up of a wireless communication device 100 and a receiver 200. The wireless communication device 100 is installed between a workpiece 300 and a 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. Applying the paint 400 can protect the wireless communication device 100 from rain, wind, ultraviolet rays, and the like.

[0015] The wireless communication device 100 can be configured using circuits called RFID (Radio Frequency Identification), RF tags, IC tags, wireless tags, etc. The wireless communication device 100 is fixed to the workpiece 300 and is installed while covered with paint by applying paint over it. The wireless communication device 100 receives radio waves emitted from the receiver 200, receives power, and performs wireless communication with the receiver 200. By configuring the wireless communication device 100 using a small circuit such as RFID, it can be installed between the workpiece 300 and the paint 400, which protects the wireless communication device 100 from rain, wind, and ultraviolet rays. Furthermore, the wireless communication device 100 can be set up 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 or away from the paint applied to the wireless communication device 100 so that it 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 desirable to install the receiver 200 so that the distance between the receiver 200 and the wireless communication device 100 is always kept constant. This is because, as will be 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 any other object fixed to the ground 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 with not only materials intended to beautify the workpiece 300 but also materials intended to protect the workpiece 300, such as waterproofing materials.

[0019] (Description of Wireless Communication Device 100) 2 is a diagram showing the 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 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 able to transmit 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 feeding 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 the 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 when the power is turned off.

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

[0025] 3 is a block diagram illustrating the 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 film thickness read from the storage unit 120 to the receiver 200 via the control unit 130. 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 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. The storage unit 120 may also store location information and an identifier (ID) relating to the location where the measurement was made.

[0028] By providing the wireless communication device 100 with the storage unit 120, it becomes possible to store data together with the structure 300, rather than in a system or medium separate from the structure 300. Since the structure 300 generally lasts for decades until it is demolished and its role is over, there is a risk of data loss if the data is stored on 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 administrator, owner, etc. changes.

[0029] The control unit 130 controls the operation of the wireless communication device 100 using 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 using, for example, 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 coating material in the storage unit 120.

[0030] Supplying power using electromagnetic induction of radio waves received by the antenna 101 has the advantage of eliminating the need for a storage device or wiring for power supply, making it possible to reduce the size, and making it easier 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 at the time of completion (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) regarding the location where the measurement was performed, or may store some of these elements. However, these data do not necessarily have to be stored.

[0032] Furthermore, when multiple wireless communication devices 100 are installed within the structure 300, the storage unit 120 may store not only information about the location where the wireless communication device 100 is installed, but also information about the locations where other wireless communication devices 100 installed in the structure 300 are installed. In this case, 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. In this way, by storing information in multiple wireless communication devices 100, it is possible to obtain the information from another wireless communication device 100 in the unlikely event that the information is lost.

[0033] 4 shows the specific contents stored in the coating film DB 121 of the memory 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] By storing the date and time, material, and film thickness when the workpiece is completed (when the paint film is applied), the memory unit 120 can reference the data even if the owner or manager changes, or if workpiece-related documents are lost. Furthermore, in the present disclosure, by storing the radio wave intensity and film thickness observed at multiple frequencies when the workpiece is completed (when the paint film is completed), it is possible to automatically estimate and add the material even if the material is not stored. This makes it possible to analyze the degree of deterioration of the paint film, etc.

[0035] (Explanation of receiver 200) 5 is a diagram showing the 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 for Interface), and an input / output IF 205.

[0037] The processor 201 is hardware for executing an instruction set written in a program, and is composed of an arithmetic unit, registers, peripheral circuits, etc. The memory 202 is for temporarily storing programs and data processed by the programs, etc., and is implemented by, for example, 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 implemented by, for example, 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 can communicate with the wireless communication device 100. For example, the communication IF 204 includes an interface for transmitting and receiving signals for reading and writing data to and from 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 output devices such as a display for presenting information to a user.

[0038] 6 is a block diagram for explaining the 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 stored in the wireless communication device 100, such as the measurement date and time, the radio wave intensity for each frequency, the film thickness, and the material, 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 about 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 transmittances of the frequencies used for material estimation are stored. For example, material 1 indicates that the transmittance for frequency f1 is 0.92 and the transmittance for 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, radio wave intensity for each frequency, film thickness, material, etc. stored in the wireless communication device 100. The transmitting / receiving unit 231 may also have a function to display 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, and 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 measurement 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 thereby analyzes this data, making it possible to analyze the time elapsed since the completion of the workpiece and the transition of radio wave intensity. In addition, the measurement unit 232 measures the radio wave intensity for each frequency, making it possible to analyze the coating film. Specifically, if material information is not stored, the material of the coating film can be 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 paint film of the paint 400 placed on the wireless communication device 100 using the radio wave intensity for each frequency measured by the measurement unit 232 and the thickness of the paint film.

[0048] The material estimation unit 233 may perform the following process, for example: Let Pk0 be the radio wave intensity of frequency fk emitted from wireless communication device 100, d be the film thickness, Pk be the radio wave intensity of frequency fk measured by measuring unit 232 of receiver 200, and TMk be the transmittance of frequency fk of a certain material M. 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 calculate the transmittance T=(T1, T2, ..., Tn) for each frequency 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 the material M by comparing which is closest to the TM of the material M registered in the material DB 221.

[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] That is, 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, 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 can estimate the material based on information on the transmittance of the material for each frequency and information on the measured radio wave intensity, without requiring a complex mechanism.

[0054] (Material estimation method 2) For example, the material estimation unit 233 may regard T and TM as vectors, regard the cosine similarity as the similarity between them, 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 less than or equal to 1, the material M of TM for which cosM(T,TM) is the largest value may be estimated to be the paint applied to 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 are measured (more 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. Machine learning may use, for example, a neural network. In this case, T having elements of multiple frequencies calculated from measured data for various materials is collected as learning data. Then, a learning model is generated for each material, and correct material is labeled 1 and incorrect material is labeled 0, and when there are J materials, J learning models are prepared. The respective learning models are 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 into 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 value 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 training data and increasing the number of frequencies to be measured to more than two.

[0059] (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. Assume that the calculated transmittance is 0.93 at frequency f1 and 0.89 at frequency f2. In estimation method 1, the material DB 221 with the smallest total difference for each frequency is estimated as the material based on equations 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.

[0060] Next, in estimation method 2, the material is estimated using cosine similarity, with frequency transmittance considered 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 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 transmittances are input into the learning models, each numbered from 1 to N, and the material of the learning model that produces the output closest to the correct answer (closest to 1) is estimated as the material of the coating.

[0062] (Installation method of receiver 200 for measuring radio wave intensity) Because receiver 200 identifies the material of the coating film using the intensity of the radio waves 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 that receiver 200 be installed in the same position for each measurement.

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

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

[0065] Furthermore, for example, rails for moving the radio wave transmitting / receiving unit 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 installation method of receiver 200 is not limited to the above. For example, the installation position of receiver 200 may be determined in advance, and radio wave intensity may be measured from that position at all times, or the radio wave intensity may be measured while in contact with paint 400 by a method other than the above.

[0067] (Processing flow) An example of the control process executed by the receiver 200 for estimating the material of a paint film will be described below 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] The control unit 230 of the receiver 200 measures the radio wave intensity for each frequency of the radio wave emitted from the radio communication device 100 via the 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, film thickness, transmittance of each material, etc. (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 on the workpiece 300. As a result, even if the manager or owner of the workpiece 300 changes and materials and data are not properly handed over, it is possible to grasp information about 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 located 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, but by using these radio waves for paint film management as well, there is no need to use a separate mechanism for film thickness measurement, such as a method using ultrasound 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 the painting is completed, but if this is forgotten, by automatically estimating the paint and storing the material as in this embodiment, it will be possible to use this information 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 be configured as a coating film management system 1 by including a plurality of wireless communication devices 100 and a single or a plurality of receivers 200 .

[0075] 10 shows a configuration diagram of the coating film management system 1. For example, the coating film 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 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 from a certain wireless communication device 100-K is lost, the data can be restored from another wireless communication device 100-L. In particular, structures 300 installed outdoors are prone to deterioration due to the effects of ultraviolet rays, rain, wind, etc. depending on the location, and data may be lost. Therefore, such a redundant configuration makes it possible to protect the data.

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

[0080] While the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to such specific embodiments, and includes the inventions set forth in the claims and their equivalents. Furthermore, the device configurations 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 film management system, 10...coating film 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 film 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 of paint applied to a workpiece, a wireless communication device fixed to the workpiece and covered with 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores 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 send 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 of paint applied to a workpiece, a wireless communication device fixed to the workpiece and covered with 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores the estimated material of the coating film; the receiver includes a transmitting / receiving unit that communicates with the wireless communication device to transmit and receive 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; The material estimation unit selects the material that has the smallest total 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, and estimates the selected material as the material of the paint.

3. A device for managing a coating of paint applied to a workpiece, a wireless communication device fixed to the workpiece and covered with 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores the estimated material of the coating film; the receiver includes a transmitting / receiving unit that communicates with the wireless communication device to transmit and receive 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; The material estimation unit is a coating film management device that estimates the material of the applied paint as the material of TM, which 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 of paint applied to a workpiece, a wireless communication device fixed to the workpiece and covered with 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores the estimated material of the coating film; the receiver includes a transmitting / receiving unit that communicates with the wireless communication device to transmit and receive 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; The material estimation unit uses data whose elements are transmittance for each frequency calculated using radio wave intensity and film thickness as learning data, and when the data whose elements are transmittance for each frequency calculated using the radio wave intensity and film thickness is 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores 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 send 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 that receives the radio waves emitted from the receiver, a control circuit that receives power from the radio waves, and a memory that stores 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 send 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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