JP7440857B1 - Film thickness management device and film thickness management system - Google Patents

Abstract

The present invention makes it possible to measure and store the film thickness of a paint on a workpiece using a film thickness management device. Note that loss of information is prevented by fixing a wireless communication device that stores information to the workpiece. [Solution] A film thickness control device includes a wireless communication device fixed to a workpiece and covered with paint, and a receiver for communicating with the wireless communication device via radio waves. It has an antenna that receives radio waves emitted from the machine, a control circuit that supplies power from the radio waves, and a memory that stores the measured film thickness. [Selection diagram] Figure 1

Description

The present disclosure relates to a film thickness management device and a film thickness management system.

Structures such as buildings and structures such as bridges (hereinafter, buildings and structures are collectively referred to as "structures") are constantly exposed to rain, wind, ultraviolet rays, vibrations caused by earthquakes, etc., and deteriorate over time. ing. Generally, there is a guideline that it is better to carry out large-scale repairs after a certain number of years have passed, but the degree of deterioration varies depending on the environment, and even the same structure is susceptible to the effects of sunlight, rain and wind. It varies depending on the location within the workpiece, depending on the location where it is easy to use, the properties of the material, etc.

For example, Patent Document 1 discloses a configuration in which a sensor for measuring strain is attached to a workpiece and connected to an RFID (Radio Frequency Identification) to transmit strain information by wireless communication.

JP2020-12346A

The object of maintaining the condition of the workpiece and performing maintenance is not only important for strain on reinforcing bars, etc., but also for the paint applied to the workpiece. This is because the paint on the workpiece is applied to protect the workpiece from rain, wind, UV rays, etc., and it deteriorates day by day, and if the paint deteriorates, the concrete and other materials of the workpiece underneath will deteriorate faster. . Therefore, it is desirable to be able to grasp the deterioration state of the paint film thickness on the workpiece and to be able to appropriately grasp this information.

Some structures have a long service life, but over a long period of time, the contractor who contracted the construction or the company that managed the structure may go out of business, and the owner of the structure may be concerned about the history of the coating. There are also cases where information cannot be grasped.

The present invention is proposed in view of the above-mentioned problems, and provides a film thickness management device that can measure the deterioration state of paint applied to a workpiece, that is, the film thickness, and perform information management. The purpose is to

In order to achieve the above object, a film thickness management device according to the present disclosure includes a wireless communication device fixed to a workpiece and covered with paint, and a receiver for communicating with the wireless communication device via radio waves. The wireless communication device includes an antenna that receives radio waves emitted from a receiver, a control circuit that supplies power from the radio waves, and a memory that stores measured film thickness.

In order to achieve the above object, a film thickness management system according to the present disclosure includes a plurality of wireless communication devices fixed to a workpiece and covered with paint, and a receiver for communicating with the wireless communication devices via radio waves. The wireless communication device includes an antenna that receives radio waves emitted from the receiver, a control circuit that supplies power from the radio waves, and a memory that stores estimated film thicknesses at multiple locations on the workpiece. , a transmitter/receiver unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio wave intensity of the radio waves received from the wireless communication device, and a paint film thickness using the radio wave intensity measured by the measurement unit. It has a film thickness estimator for estimating the film thickness.

According to the present disclosure, by installing a wireless device for controlling the film thickness under the paint applied to the workpiece, it becomes possible to easily manage the film thickness.

1 is a diagram showing an outline of a film thickness management device 10. FIG. 1 is a diagram showing a hardware configuration of a wireless communication device 100. FIG. 1 is a block diagram showing basic functions of a wireless communication device 100. FIG. 3 is a diagram illustrating an example of contents stored in a film thickness DB 121 of a storage unit 120 of the wireless communication device 100. FIG. 2 is a diagram showing the hardware configuration of a receiver 200. FIG. 2 is a block diagram showing the basic functions of a receiver 200. FIG. It is a figure which shows an example of the installation method of the receiver 200 at the time of a film thickness measurement. 3 is a diagram showing a specific example of a correspondence table used by the film thickness estimating unit 233. FIG. It is a flow chart which shows an example of control processing when receiver 200 performs film thickness measurement. 1 is a diagram showing a specific configuration of a film thickness management system 1. FIG.

Embodiments of the present disclosure will be described below 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 components shown in the embodiments are essential components of the present disclosure.

<Description of film thickness control device>
FIG. 1 is a diagram showing an outline of a film thickness management device 10. As shown in FIG. The film thickness management device 10 includes a wireless communication device 100 and a receiver 200. Moreover, the wireless communication device 100 is installed between the workpiece 300 and the paint 400. Specifically, the wireless communication device 100 is fixed to a workpiece 300 using double-sided tape, adhesive, or the like, and the paint 400 is applied thereon. By applying the paint 400, it is possible to protect the wireless communication device 100 from rain, wind, ultraviolet rays, and the like.

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 a workpiece 300 and is 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. By constructing the wireless communication device 100 using a small circuit such as RFID, it is possible to install it between the workpiece 300 and the paint 400, thereby protecting the wireless communication device 100 from rain, wind and ultraviolet rays. Furthermore, it becomes possible to configure the wireless communication device 100 without affecting aesthetics.

The receiver 200 transmits radio waves to the wireless communication device 100 to perform wireless communication. The receiver 200 is installed on top of the paint or separated from the paint so that the thickness of the paint applied on the wireless communication device 100 can be measured using radio waves. The receiver 200 measures the intensity of radio waves received from the wireless communication device 100, reads out data stored in the memory of the wireless communication device 100, and stores the data in the memory of the wireless communication device 100. Note that it is desirable that the receiver 200 and the wireless communication device 100 be installed so that the distance between them is always kept constant. This is because, as will be described later, since the receiver 200 measures the intensity of radio waves emitted from the wireless communication device 100, it is desirable to keep the distance constant.

The structures 300 are objects to which paint is applied, such as buildings, bridges, steel towers, etc., which are fixed on land.

The paint 400 is made of a material that is applied to the workpiece 300 and adheres to the workpiece 300 when it dries, and contains not only a material that beautifies the workpiece 300 but also a material that protects the workpiece 300 such as a waterproof material. .

(Description of wireless communication device 100)
FIG. 2 is a diagram showing the hardware configuration of the wireless communication device 100. The wireless communication device 100 includes an antenna 101, a control circuit 102, and a memory 103. Further, in addition to this, a CPU (Central Processing Unit) and volatile memory may be provided.

Antenna 101 transmits or receives radio waves to perform wireless communication with receiver 200 .

The control circuit 102 is a circuit for controlling the wireless communication device 100. For example, a circuit for modulating and demodulating radio waves transmitted and received by antenna 101, a circuit for feeding power from radio waves received by antenna 101, a circuit for reading data from memory 103, and a circuit for writing data in memory 103. is included.

The control circuit 102 is connected to the antenna 101, demodulates radio waves received by the antenna 101, modulates data, and transmits the data via the antenna 101. Further, the control circuit 102 is connected to the memory 103, writes data to the memory 103, and reads data from the memory 103.

Memory 103 stores data. The data stored in the memory 103 includes the measured film thickness and the like. The memory 103 is realized by a non-volatile memory and retains stored data even if the power is turned off.

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

FIG. 3 is a block diagram for explaining the basic functions of the wireless communication device 100. The wireless communication device 100 includes a communication section 110, a storage section 120, and a control section 130.

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 read from the storage unit 120 via the control unit 130, such as film thickness, material, date and time, and radio wave intensity, to the receiver 200. For example, the communication unit 110 communicates with the receiver 200 and stores data received from the receiver 200, such as film thickness, material, date and time, and radio wave intensity, in the storage unit 120 via the control unit 130.

Storage unit 120 stores data stored by wireless communication device 100. For example, the storage unit 120 stores data such as film thickness, material, date and time, and measured radio wave intensity. Further, position information and an identifier (ID: Identification) regarding the measured place may be stored.

By including the storage unit 120 in the wireless communication device 100, data can be stored together with the workpiece 300 rather than in a system or medium separate from the workpiece 300. Since the workpiece 300 generally lasts for several decades until it is dismantled and its role is completed, there is a risk of data loss if the workpiece 300 is stored on a separate system or device. By storing data in the wireless communication device 100 installed together with the workpiece 300 as in the present invention, even if the administrator or owner changes, it is possible to manage the data without losing it. Become.

The control unit 130 controls the operation of the wireless communication device 100 using a control circuit of the wireless communication device 100. Specifically, the control unit 130 includes a circuit for supplying power to the wireless communication device 100 using electromagnetic induction of radio waves received by the antenna 101. Further, the control unit 130 demodulates data that the communication unit 110 receives 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 film thickness, material, date and time, and radio wave intensity from the storage unit 120, or writes information such as film thickness, material, date and time, and radio wave intensity into the storage unit 120. Make me remember.

Supplying power using electromagnetic induction of radio waves received by the antenna 101 has the advantage of eliminating the need for a power storage device or wiring for power supply and making it more compact. It becomes easier to do so.

(Specific example of data stored by wireless communication device 100)
The storage unit 120 stores information such as the time when the workpiece was completed (temporal information such as date and time), the material, the film thickness, the radio field intensity of the radio waves that the receiver 200 receives from the wireless communication device 100, and the time when the radio wave intensity was measured. do. In addition, location information and identifiers (IDs) related to the measurement location may be stored.

Furthermore, when a plurality of wireless communication devices 100 are installed in the workpiece 300, the storage unit 120 stores not only information on the location where the wireless communication device 100 is installed, but also information on other wireless communication devices installed in the workpiece 300. Information about the location where the device 100 is installed may be stored. At this time, by storing the information as a set with information such as location information or an identifier, it is possible to identify which wireless communication device 100 the information relates to. By storing information in a plurality of wireless communication devices 100 in this way, in the event that information is lost, it becomes possible to acquire information from other wireless communication devices 100.

FIG. 4 shows specific contents stored in the film thickness DB 121 of the storage unit 120. The figure shows that on October 1, 2000, when the workpiece was completed, the film thickness was 2 mm, and the radio field intensity of the radio waves received by the receiver 200 from the wireless communication device 100 was 250 mW. Further, in subsequent measurements, on October 1, 2006, the radio field intensity of the radio waves received by the receiver 200 from the wireless communication device 100 was 310 mW, and the estimated film thickness was 1.8 mm. Showing.

The storage unit 120 stores the date and time, material, and film thickness at the time of completion of the workpiece, so that the data can be referenced even if the owner or manager changes or workpiece-related materials are lost. becomes possible. Furthermore, by memorizing the measurement date and time, radio wave intensity, film thickness, etc. since the workpiece was completed, it is possible to grasp the time and degree of deterioration and use it for analysis. In addition, by installing the wireless communication device 100 at multiple locations on the workpiece, it becomes possible to grasp the degree of deterioration at each location on the workpiece and use it for analysis.

(Description of receiver 200)
FIG. 5 is a diagram showing the hardware configuration of receiver 200. Receiver 200 can be configured by a general-purpose computer.

As shown in FIG. 5, the receiver 200 includes a processor 201, a memory 202, a storage 203, a communication IF 204 (IF is written as an abbreviation for InterFace), and an input/output IF 205.

The processor 201 is hardware for executing a set of instructions written in a program, and is composed of an arithmetic unit, registers, peripheral circuits, 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 DRAM (Dynamic Random Access Memory). The storage 203 is a storage device for storing data such as programs, and is realized by, for example, a flash memory, an SSD (Solid State Drive), or an HDD (Hard Disk Drive). 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 that transmits and receives signals for reading data 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 the user, and output devices such as a display for presenting information to the user.

FIG. 6 is a block diagram for explaining the basic functions of receiver 200. The receiver 200 includes a communication section 210, a storage section 220, and a control section 230.

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 transfers data such as film thickness, material, date and time, and radio field intensity stored in the wireless communication device 100 to the wireless communication device 100. It is acquired via the communication unit 110 and/or transmitted via the communication unit 110.

Storage unit 220 stores data and programs used by receiver 200.

The control unit 230 is realized by the processor of the receiver 200 reading a program stored in the storage unit 220 and executing instructions included in the program. Control unit 230 controls the operation of receiver 200. Specifically, the control section 230 functions as a transmitting/receiving section 231, a measuring section 232, and a film thickness estimating section 233.

The transmitting/receiving unit 231 communicates with the wireless communication device 100 via the communication unit 210, and receives and acquires data stored in the wireless communication device 100, such as film thickness, material, date and time, and radio field intensity. Further, the transmitting/receiving unit 231 displays the acquired data via the input/output IF 205.

The transmitting/receiving 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 by other functions of the control unit 230 to the wireless communication device 100. and is stored in the storage unit 120 of the wireless communication device 100.

The measurement unit 232 measures the radio field intensity of radio waves emitted from the antenna 101 of the wireless communication device 100 via the communication unit 210. The measured radio field intensity is stored in the storage unit 120 of the wireless communication device 100 via the communication unit 210 along with the temporal information at the time of measurement.

The measurement unit 232 stores the time information and radio wave intensity at the time of measurement together in the storage unit 120 of the wireless communication device 100 via the communication unit 210, analyzes these data, and calculates the time and radio wave intensity of the workpiece. It becomes possible to analyze changes in intensity.

The film thickness estimating unit 233 estimates the film thickness of the paint 400 installed on the wireless communication device 100 using the radio wave intensity measured by the measuring unit 232. The radio field strength measured by the measurement unit 232 attenuates in proportion to the square of the distance between the wireless communication device 100 and the receiver 200, so based on this, the distance can be calculated from the radio field strength measured by the measurement unit 232. It may be calculated.

For example, the film thickness estimating unit 233 creates a correspondence table between radio wave intensity and film thickness for each material in advance, and compares the type of material stored in the storage unit 120 of the wireless communication device 100 with the measurement unit 232. The film thickness of the paint 400 may be estimated using the radio wave intensity obtained.

これをdについて解くと、数２のように示すことができる。

受信機２００は、記憶部２２０に塗料４００の素材ごとの透過率Tと無線通信装置１００が発する電波強度P0を記憶しておき、計測部２３２が測定した電波強度Pを用いることで、膜厚dを算出することが可能となる。 The film thickness estimation unit 233 may estimate the film thickness of the paint 400 as follows. If the radio wave intensity emitted from the wireless communication device 100 is P0, the film thickness is d, the radio wave intensity measured by the measurement unit 232 of the receiver 200 is P, and the radio wave transmittance of the material of the paint 400 is T, then the measured radio wave intensity is P can be expressed by the following model.

Solving this for d can be shown as equation 2.

The receiver 200 stores the transmittance T of each material of the paint 400 and the radio wave intensity P0 emitted by the wireless communication device 100 in the storage unit 220, and calculates the film thickness by using the radio wave intensity P measured by the measurement unit 232. It becomes possible to calculate d.

As described above, the result estimated by the film thickness estimation unit 233 can be used as the film thickness measured by the receiver 200.

In addition, the film thickness estimating unit 233 estimates the film thickness using the radio wave intensity measured by the measuring unit 232, compared to using conventional methods such as electromagnetic method, overcurrent method, infrared rays, and ultrasonic method. It becomes possible to omit necessary mechanisms. This contributes to cost reduction, downsizing, etc.

However, the film thickness estimating unit 233 is not limited to using radio wave intensity as described above, but can also be used by installing a mechanism that uses conventional methods such as electromagnetic type, overcurrent type, infrared rays, and ultrasonic waves. The thickness estimating unit 233 may estimate the film thickness using such a method.

(How to install receiver 200 for film thickness measurement)
Since the receiver 200 measures the film thickness using the radio wave intensity emitted from the wireless communication device 100, accurate film thickness measurement cannot be achieved if the position of the receiver 200 changes each time. Therefore, it is desirable that the receiver 200 be installed at the same position in every measurement.

FIG. 7 shows an example of how to install the receiver 200 when measuring film thickness. As shown in FIG. 7, it is preferable to install a sensor part for measuring the film thickness as a probe 240, and bring the probe 240 into contact with the paint 400 to measure the radio wave intensity. Note that the radio wave intensity may be measured by bringing the radio wave transmitting/receiving section of the receiver 200 into contact with the paint 400 without installing the probe 240.

Furthermore, although the wireless communication device 100 has a fixed surface, the distance between the radio wave transmitting/receiving unit of the receiver 200 (the probe 240 when installing the probe 240) and the antenna 101 of the wireless communication device 100 differs for each measurement. and the film thickness cannot be measured correctly. Therefore, for example, the radio wave transmitting/receiving unit of the receiver 200 (the probe 240 when setting the probe 240) is configured to have wheels so that the radio wave intensity can be measured while making contact with the paint 400. The film thickness may be measured by evenly moving the radio wave transmitting/receiving section of the receiver 200 (the probe 240 when setting the probe 240) near the antenna 101, and using the value with the strongest radio wave intensity as the measurement value.

Furthermore, a rail for moving the radio wave transmitting/receiving unit of the receiver 200 (the probe 240 when the probe 240 is set) may be installed on the paint covering the wireless communication device 100. The receiver 200 may be configured to receive radio waves from the wireless communication device 100 and measure the radio wave intensity while being in contact with the paint 400, and may measure the film thickness using the value with the strongest radio wave intensity as the measurement value. By installing rails, measurements can be made on the same track, increasing the accuracy of film thickness measurements.

The method of installing the receiver 200 for film thickness measurement is not limited to the above. For example, the installation position of the receiver 200 may be determined and the radio field intensity may be always measured from that position, or a method other than the above may be used. Depending on the method, the radio wave intensity may be measured while contacting with the paint 400.

(Specific processing method for film thickness estimation - When using a correspondence table)
An example in which film thickness is actually measured by film thickness estimation by the film thickness estimation unit 233 of the receiver 200 will be shown. First, the probe 240 of the receiver 200 is moved evenly over the paint 400 near the wireless communication device 100 to scan the radio field strength, and the strongest radio field strength is measured. At this time, the radio waves emitted from the receiver 200 are generated by electromagnetic induction generated by the antenna 101 of the wireless communication device 100, and the radio waves are sensed by the probe 240 of the receiver 200 to measure the intensity of the radio waves.

The transmitting/receiving unit 231 of the receiver 200 acquires material data from the film thickness DB 121 of the wireless communication device 100 in advance. Assuming that the strongest radio wave intensity measured by the measurement unit 232 is P, the film thickness estimating unit 233 calculates the film thickness d corresponding to the radio wave intensity P from a correspondence table showing film thicknesses according to the radio wave intensity created for each paint. is obtained, and this is taken as the film thickness of the estimation result.

FIG. 8 shows a specific example of the correspondence table used by the film thickness estimation unit 233. For example, if the material of the paint 400 is A and the received radio wave intensity is 990 mW, the film thickness estimation unit 233 calculates 0.11 mm corresponding to 990 mW in the correspondence table as the estimated film thickness.

(Specific processing method for film thickness estimation - when using modeled formulas)
As in the case of using the correspondence table, first, the probe 240 of the receiver 200 is moved evenly over the paint 400 near the wireless communication device 100 to scan the radio field strength, and the strongest radio field strength is measured. At this time, the radio waves emitted from the receiver 200 are generated by electromagnetic induction generated by the antenna 101 of the wireless communication device 100, and the radio waves are sensed by the probe 240 of the receiver 200 to measure the intensity of the radio waves.

The transmitting/receiving unit 231 of the receiver 200 acquires the material data and the radio wave intensity P0 emitted by the wireless communication device 100 from the film thickness DB 121 of the wireless communication device 100 in advance. Further, the storage unit 220 of the receiver 200 stores the transmittance T corresponding to the material. For example, assume that the material is A and its transmittance T=1.

Assuming that the strongest radio wave intensity measured by the measurement unit 232 is P = 250, the transmittance T = 1, and P0 = 1000, the film thickness estimation unit 233 calculates d = 2 using Equation 2, and calculates this. Let be the estimated film thickness.

(Explanation of effects)
The configuration of the film thickness management device 10 has been described above, and by using the wireless communication device 100, data can be stored in the workpiece 300. As a result, even if the manager or owner of the structure 300 is changed and the materials and data are not transferred properly, the data is still stored in the wireless communication device 100 installed on the structure 300. Therefore, in addition to the film thickness at the time of construction and the material of the paint 400, it is possible to grasp information regarding film thicknesses measured after that time.

In addition, in order to acquire data from the wireless communication device 100, communication using radio waves is required, but by using these radio waves for film thickness measurement, film thickness measurement methods such as methods using ultrasonic waves or electric current can be used. Therefore, there is no need to use a separate mechanism, and the film thickness of the paint 400 can be measured with a simple configuration.

In addition, compared to a general film thickness meter, the measured film thickness may be affected by the distance to the wireless communication device 100; By moving evenly and measuring the strongest radio wave intensity, the above problem can be solved and accurate film thickness measurement possible. Furthermore, by providing wheels on the probe 240 or installing rails for moving the probe 240, it becomes possible to easily move the probe 240 evenly.

(Processing flow)
Hereinafter, an example of a control process executed by the receiver 200 for film thickness measurement will be described with reference to FIG. 9.

The control unit 230 of the receiver 200 acquires information such as the material, previously measured film thickness, measurement date and time, and radio wave intensity from the wireless communication device 100 via the communication unit 210 (step S101).

The control unit 230 of the receiver 200 measures the intensity of radio waves emitted from the wireless communication device 100 via the communication unit 210 (step S102).

The control unit 230 of the receiver 200 estimates the film thickness using the measured radio wave intensity, the obtained material, and other information such as previously measured film thickness and measurement date and time (step S103).

After estimating the film thickness, the control unit 230 of the receiver 200 notifies the radio communication device 100 of the date and time of measurement via the communication unit 210 in order to store data regarding the estimated film thickness. Send film thickness. (Step S104)

(Film thickness management system)
The film thickness management device 10 may include a plurality of wireless communication devices 100 and a single or multiple receivers 200, and may be configured as a film thickness management system 1.

FIG. 10 shows a configuration diagram of the film thickness management system 1. For example, the film thickness management system 1 includes 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.

The receiver 200 is capable of communicating with the wireless communication devices 100-1 to 100-N, and measures the film thickness by communicating with the wireless communication devices 100-1 to 100-N, and sends the film thickness data to each of the wireless communication devices 100-1 to 100-N. It is stored in wireless communication devices 100-1 to 100-N. This makes it possible to store film thickness data at each location in the wireless communication device 100.

Furthermore, the wireless communication devices 100-1 to 100-N may store not only data regarding the film thickness at the corresponding location, but also film thickness data regarding other wireless communication devices 100 on the workpiece 300.

The wireless communication devices 100-1 to 100-N store not only film thickness data from the past to the present on the wireless communication device, but also film thickness data regarding other wireless communication devices 100, so that, for example, a certain wireless communication Even if the data of device 100-K is lost, it is possible to restore the data from other wireless communication device 100-L. In particular, the workpiece 300 installed outdoors is susceptible to deterioration depending on the location due to the effects of ultraviolet rays, rain, wind, etc., and there is a possibility that data may be lost. Therefore, data is protected using this redundant configuration. becomes possible.

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

Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to such specific embodiments, and the present disclosure includes the inventions described in the claims and their equivalents. It will be done. Moreover, the configurations of the apparatuses described in the above embodiments and modified examples can be combined as appropriate unless a technical contradiction occurs.

DESCRIPTION OF SYMBOLS 1... Film thickness management system, 10... Film thickness 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... Film thickness 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, 230...Control unit, 231...Transmission/reception unit, 232...Measurement unit, 233...Film thickness estimation unit, 240...Probe, 300...Workpiece, 400...Paint, NW...Network

Claims (7)

A device for controlling the film thickness of paint applied to a workpiece,
a wireless communication device fixed to the workpiece and installed so as to be covered with the paint;
comprising the wireless communication device and a receiver for communicating via radio waves,
The wireless communication device includes an antenna that receives the radio waves emitted from the receiver, a control circuit that supplies power from the radio waves, and a memory that stores information including measurement dates and times and film thicknesses at a plurality of dates and times. Thickness control device. A device for controlling the film thickness of paint applied to a workpiece,
a wireless communication device fixed to the workpiece and installed so as to be covered with the paint;
comprising the wireless communication device and a receiver for communicating via radio waves,
The wireless communication device includes an antenna that receives the radio waves emitted from the receiver, a control circuit that supplies power from the radio waves, and a memory that stores information including the date and time of measurements and film thickness at a plurality of dates and times. ,
The receiver includes a transmitting/receiving unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio field intensity of the radio waves received from the wireless communication device, and a radio field intensity measured by the measurement unit. A film thickness management device comprising a film thickness estimating section that estimates the film thickness of the paint using. 3. A rail is installed on the paint that covers the wireless communication device, and the receiver receives the radio waves from the wireless communication device while the receiver and the paint are in contact with each other. Film thickness control device. 3. The film thickness management device according to claim 2, wherein the film thickness estimating unit in the receiver estimates the film thickness using a correspondence table that is created for each paint and shows film thicknesses according to radio wave intensities. The film thickness estimating unit in the receiver determines that when the radio wave intensity emitted from the wireless communication device is P0, the transmittance of the paint is T, and the radio wave intensity measured by the measuring unit of the receiver is P, The film thickness management device according to claim 2, wherein the film thickness d is estimated by the following equation 3.

A system for managing the film thickness of paint applied to a workpiece,
a plurality of wireless communication devices fixed to the workpiece and installed so as to be covered with the paint;
comprising the wireless communication device and a receiver for communicating via radio waves,
The wireless communication device includes an antenna that receives the radio waves emitted from the receiver, a control circuit that supplies power from the radio waves, and a memory that stores information including the date and time of measurements and film thickness at a plurality of dates and times. ,
The receiver includes a transmitting/receiving unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio field intensity of the radio waves received from the wireless communication device, and a radio field intensity measured by the measurement unit. A film thickness management system comprising a film thickness estimating section that estimates the film thickness of the paint using. A system for managing the film thickness of paint applied to a workpiece,
a plurality of wireless communication devices fixed to the workpiece and installed so as to be covered with the paint;
comprising the wireless communication device and a receiver for communicating via radio waves,
The wireless communication device includes an antenna that receives the radio waves emitted from the receiver, a control circuit that supplies power from the radio waves, and an estimated film thickness of a wireless communication device other than the radio communication device within the workpiece. has a memory that stores information including ;
The receiver includes a transmitting/receiving unit that communicates with the wireless communication device to transmit and receive data, a measurement unit that measures the radio field intensity of the radio waves received from the wireless communication device, and a radio field intensity measured by the measurement unit. A film thickness management system comprising a film thickness estimating section that estimates the film thickness of the paint using.

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