JP2009074926A - Cured state measuring instrument and cured state measuring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cured state measuring instrument capable of easily setting a proper criterion in consideration of the factor related to the curing reaction of an ultraviolet curable resin, and to provide a cured state measuring method. <P>SOLUTION: A CPU imparts a control order to a floodlight driving circuit to irradiate the floodlight projection drive circuit with exciting ultraviolet rays only for a relatively short time (step S104), acquires the quantity of the fluorescence produced from the ultraviolet curable resin upon the reception of the irradiation with exciting ultraviolet rays from an analogue/digital conversion part (step S106), and displays the quantity value of the fluorescence on a display part as the initial quantity of the fluorescence (step S108). A user operates a set value altering button during the display of the initial quantity of the fluorescence to set a threshold value as the relative value to the initial quantity of the fluorescence. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cured state measuring apparatus and a cured state measuring method for measuring a cured state of an ultraviolet curable resin, and more particularly to an apparatus and method for performing appropriate measurement according to characteristics of an ultraviolet curable resin, an object, and the like.

  In recent years, an ultraviolet curing method (Ultra Violet Curing) is used as a curing method for adhesives and coating agents in many industrial fields. The UV curing method has many advantages compared to the thermal curing method that uses thermal energy, such as not diffusing harmful substances into the atmosphere, shortening the curing time, and being applicable to heat-sensitive products. .

  In the ultraviolet curing method, an ultraviolet curable resin is used, which is mainly liquid before ultraviolet irradiation, but changes to a solid after ultraviolet irradiation. Such an ultraviolet curable resin contains at least one of a monomer and an oligomer as a main ingredient, and further contains a photopolymerization initiator. The photopolymerization initiator generates radicals and cations upon receiving irradiated ultraviolet rays, and the generated radicals and cations cause a polymerization reaction with the monomers and oligomers. Along with this polymerization reaction, the monomer or oligomer changes to a polymer, the molecular weight becomes extremely large, and the melting point decreases. As a result, the ultraviolet curable resin cannot be maintained in a liquid state and changes to a solid.

  On the other hand, it is difficult to visually determine the degree of cure of the UV curable resin and the presence or absence of quality abnormality, and a method for easily determining the curing reaction state of the UV curable resin is desired. Therefore, for example, in Japanese Patent No. 2651036 (Patent Document 1), the degree of cure of the curable coating material is set by adding a probe that emits light to the ultraviolet curable resin so as to change as a function of the degree of cure of the curable material. A method for monitoring is disclosed. However, the addition of a special material such as the above-mentioned probe is disadvantageous in terms of cost, and it is often not allowed to add such a probe from the viewpoint of quality, so that it is not versatile.

In contrast, the inventors of the present application observed that the photopolymerization initiator itself contained in the ultraviolet curable resin correlates with the cured state (for example, the degree of curing) of the ultraviolet curable resin in response to the ultraviolet irradiation to the ultraviolet curable resin. The fact of radiating possible fluorescence was found, and a method for estimating the state of an ultraviolet curable resin using this fact was filed as Japanese Patent Application No. 2006-071580.
Japanese Patent No. 2651036

  According to the above-described method for estimating the state of the ultraviolet curable resin, the ultraviolet ray generated by the ultraviolet light source is irradiated to the target ultraviolet curable resin, and the fluorescence generated by the ultraviolet ray is detected by the light receiving unit and detected by the light receiving unit. The cured state is determined based on the amount of fluorescence that is applied.

  By the way, the amount of fluorescence emitted from the ultraviolet curable resin depends on the type of the ultraviolet curable resin, its deterioration state (quality), the irradiation condition of the ultraviolet rays, and the like. For this reason, in order to more accurately determine the degree of curing of the ultraviolet curable resin and the presence or absence of quality abnormality, it is necessary to obtain in advance an appropriate determination criterion considering such factors.

  However, it is not easy to accurately identify such factors, and it is difficult to determine an appropriate criterion.

  Accordingly, the present invention has been made to solve such a problem, and the object thereof is to provide a curing state measuring device and a curing device that can easily set an appropriate judgment criterion in consideration of factors relating to a curing reaction with respect to an ultraviolet curable resin. It is to provide a state measurement method.

  According to one aspect of the present invention, there is provided a cured state measuring device for measuring a cured state of an ultraviolet curable resin containing a main agent composed of at least one of a monomer and an oligomer and a photopolymerization initiator. The cured state measuring device includes a light projecting unit that generates ultraviolet rays for activating the ultraviolet curable resin, a light receiving unit that receives the ultraviolet rays and receives fluorescence emitted from the photopolymerization initiator, a control unit, and a display unit. And an operation unit. The control unit has mode switching means that can select either the setting mode or the inspection mode in accordance with a setting operation from the operation unit, and when the ultraviolet curable resin is irradiated to the ultraviolet curable resin in the setting mode, the light receiving unit receives the light. An initial value display means for displaying the amount of fluorescence to be displayed on the display section as an initial value, a judgment standard setting means for setting a judgment standard according to a setting operation from the operation section during display of the initial value in the setting mode, and an inspection Judging means for judging whether or not a curing reaction has occurred in the ultraviolet curable resin in accordance with the judgment standard based on the amount of fluorescence received by the light receiving unit when the ultraviolet curable resin is irradiated with the ultraviolet ray in the mode; including.

  According to the present invention, before the curing reaction occurs in the ultraviolet curable resin, the ultraviolet curable resin is irradiated in advance with ultraviolet rays to acquire the initial value of the fluorescence amount, and the initial value is displayed on the display unit. Then, during the display of the initial value, a determination criterion is set according to the setting operation from the user. As a result, the user can set the determination standard while referring to the initial value, and therefore can set the determination standard according to the initial value that varies depending on various factors. Therefore, it is possible to easily set an appropriate determination criterion in consideration of factors related to the curing reaction for the ultraviolet curable resin.

  Preferably, the control unit further includes determination criterion candidate calculation means for calculating a determination criterion candidate according to a predetermined arithmetic expression based on the initial value.

  Preferably, the cured state measuring device further includes a storage unit, and the control unit associates the type setting unit for setting the type of the ultraviolet curable resin according to the setting operation from the operation unit, and the type of the ultraviolet curable resin. And a criterion storage means for storing the set criterion in the storage unit.

  Preferably, the control unit further includes teaching means for calculating a determination criterion based on the initial value and the final value that is the amount of fluorescence obtained by irradiating the ultraviolet ray after completion of the curing reaction of the ultraviolet curable resin.

  More preferably, the teaching means is obtained by continuously irradiating the ultraviolet curable resin with ultraviolet rays when the ultraviolet curable resin is continuously irradiated with other ultraviolet rays for promoting the curing reaction of the ultraviolet curable resin. Based on the temporal change in the amount of fluorescence, an initial value and a final value are obtained.

  Preferably, the control unit determines whether the ultraviolet curable resin is good based on the amount of fluorescence obtained by irradiating the ultraviolet curable resin with ultraviolet rays.

Preferably, the determination criterion is a threshold value.
According to another aspect of the present invention, there is provided a cured state measuring method for measuring a cured state of an ultraviolet curable resin containing a main agent composed of at least one of a monomer and an oligomer and a photopolymerization initiator using a cured state measuring device. To do. The cured state measuring device includes a light projecting unit that generates ultraviolet rays, a light receiving unit that receives fluorescence, a display unit, and an operation unit. The cured state measuring method includes a step of selecting one of a setting mode and an inspection mode according to a setting operation from the operation unit, a step of irradiating the ultraviolet curable resin with ultraviolet rays from the light projecting unit in the setting mode, and a setting mode. Receiving in the light receiving unit the fluorescence emitted from the photopolymerization initiator in response to ultraviolet rays, and in the setting mode, displaying the amount of fluorescence received by the light receiving unit as an initial value on the display unit, setting While displaying the initial value in the mode, the step of setting a judgment criterion according to the setting operation from the operation unit, the step of irradiating the ultraviolet curable resin with ultraviolet rays from the light projecting unit in the inspection mode, and the light reception in the inspection mode Determining whether or not a curing reaction in accordance with a criterion is occurring in the ultraviolet curable resin based on the amount of fluorescence received by the unit; Provided.

  According to the present invention, it is possible to easily set an appropriate determination criterion in consideration of factors related to the curing reaction with respect to the ultraviolet curable resin.

  Embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

(Schematic configuration of UV irradiation system)
FIG. 1 is a schematic configuration diagram of an ultraviolet irradiation system 1 including a cured state measuring device according to an embodiment of the present invention.

  With reference to FIG. 1, the ultraviolet irradiation system 1 accelerates the curing reaction of the cured state measuring device 100 (hereinafter also referred to as “measuring device 100”) that measures the cured state of the ultraviolet curable resin 12. And a light source device 200 for irradiating the curing ultraviolet ray 54 for the purpose. And the ultraviolet irradiation system 1 is arrange | positioned as an example in the manufacturing line which arrange | positions the to-be-adhered body 8 on the base material 6, and adhere | attaches both using the ultraviolet curing resin 12. FIG. In the following, the base material 6, the adherend 8, and the ultraviolet curable resin 12 are also collectively referred to as “work”. The ultraviolet curable resin 12 includes a main agent composed of at least one of a monomer and an oligomer and a photopolymerization initiator, and undergoes a curing reaction upon receiving ultraviolet rays.

  The light source device 200 includes an irradiation head unit 204 that generates the curing ultraviolet ray 54 and a light source unit 202 for controlling the irradiation head unit 204.

  The irradiation head unit 204 includes an ultraviolet light source that generates curing ultraviolet light 54, and the ultraviolet light source typically includes an ultraviolet LED (Light Emitting Diode), an ultraviolet lamp, and the like. Moreover, the irradiation head part 204 is arrange | positioned, for example in the perpendicular | vertical upper part of a workpiece | work so that the generated ultraviolet-ray 54 for hardening may be irradiated to the ultraviolet curing resin 12. FIG.

  The light source unit 202 is electrically connected to the irradiation head unit 204 and controls generation of the curing ultraviolet ray 54 in the irradiation head unit 204 in response to an external command from a user or an external device. Specifically, the light source unit 202 starts generation of the curing ultraviolet ray 54 in response to an irradiation command (not shown) of the curing ultraviolet ray 54 and ends the irradiation of the curing ultraviolet ray 54 from the measuring device 100 or the like. In response to the instruction, generation of the curing ultraviolet ray 54 is stopped.

  Further, in order to synchronize the irradiation operation of the measuring apparatus 100 with the irradiation state of the curing ultraviolet ray 54, the light source unit 202 sends an irradiation state signal of the curing ultraviolet ray 54, for example, an irradiation start signal and an irradiation end signal to the measuring apparatus 100. .

  On the other hand, measuring apparatus 100 according to the embodiment of the present invention includes fluorescence measurement head unit 104 and control unit 102 for controlling fluorescence measurement head unit 104.

  The fluorescence measurement head unit 104 generates an excitation ultraviolet ray 50 for activating the target ultraviolet curable resin 12 in accordance with a control command received from the control unit 102 and irradiates the ultraviolet curable resin 12 with the excitation ultraviolet ray. 50, receives the fluorescence 52 emitted from the ultraviolet curable resin 12, and outputs a signal indicating the amount of the fluorescence to the control unit 102. That is, the fluorescence measurement head unit 104 includes a light projecting unit such as an ultraviolet LED that generates the excitation ultraviolet ray 50 and a light receiving unit that receives the fluorescence 52 emitted from the excitation ultraviolet ray 50.

  On the other hand, the control unit 102 is electrically connected to the fluorescence measurement head unit 104 and controls the generation of the excitation ultraviolet ray 50 in the fluorescence measurement head unit 104 according to the irradiation state of the light source device 200, and from the fluorescence measurement head unit 104. A signal indicating the amount of fluorescence to be output is acquired. Further, the control unit 102 is configured to be able to select either “setting mode” or “inspection mode” in accordance with a setting operation from the operation unit 44 (FIG. 2). The “setting mode” is a mode for typically setting a judgment criterion such as a threshold value before the curing ultraviolet ray 54 is irradiated to the ultraviolet curing resin. The “inspection mode” is a mode in which the ultraviolet curing resin 54 is irradiated with the curing ultraviolet ray 54 to accelerate the curing reaction, and at the same time, it is determined whether the ultraviolet curing resin has undergone a curing reaction according to a predetermined criterion. is there.

  Then, the control unit 102 sets the fluorescence amount output from the fluorescence measurement head unit 104 when the excitation ultraviolet ray 50 is irradiated to the ultraviolet curable resin 12 in the setting mode as an initial value (hereinafter also referred to as “initial fluorescence amount”). ) On the display unit 42 (FIG. 2). During the display of the initial fluorescence amount, the user refers to the initial fluorescence amount and sets a determination criterion. Here, as will be described later, the initial fluorescence amount is a value depending on various factors such as the type and state of the ultraviolet curable resin, the ultraviolet irradiation condition, and the workpiece material. Therefore, by setting a determination criterion based on this initial fluorescence amount, a determination criterion suitable for the target work can be set appropriately.

  After the determination criteria are set in this way, the user selects the inspection mode and starts the irradiation of the curing ultraviolet ray 54 from the irradiation head unit 204. During the irradiation of the curing ultraviolet ray 54, the excitation ultraviolet ray 50 is continuously emitted from the fluorescence measuring head unit 104, and the cured state of the ultraviolet curable resin 12 is continuously measured. Based on the amount of fluorescence detected by the fluorescence measurement head unit 104, the control unit 102 determines whether or not a curing reaction is occurring in accordance with a predetermined criterion set with the ultraviolet curable resin. Further, when the control unit 102 determines that the curing reaction in the ultraviolet curable resin 12 is completed, the control unit 102 gives an irradiation end instruction to the light source unit 202 and stops the generation of the excitation ultraviolet ray 50 to measure the cured state of the ultraviolet curable resin 12. Exit.

(UV curable resin)
First, ultraviolet curable resin 12 used in ultraviolet irradiation system 1 according to the present embodiment will be described. The ultraviolet curable resin 12 is mainly liquid before irradiation with ultraviolet rays, but changes (cures) into a solid after irradiation with ultraviolet rays. In this specification, “ultraviolet curable resin” is used in a generic sense regardless of its state (liquid state before ultraviolet irradiation or solid state after ultraviolet irradiation).

  The ultraviolet curable resin before ultraviolet irradiation (before curing) includes at least one of a monomer and an oligomer, a photopolymerization initiator, and various additives. Monomers and oligomers are main agents, and undergo a polymerization reaction (main chain reaction, cross-linking reaction, etc.) by radicals and cations generated by a photopolymerization initiator upon receiving ultraviolet rays. In accordance with this polymerization reaction, the monomer and oligomer are changed to a polymer, the molecular weight becomes extremely large, and the melting point is lowered. As a result, the ultraviolet curable resin changes from a liquid to a solid.

  As an example, the monomer and oligomer are made of polyester acrylate, urethane acrylate, polybutadiene acrylate, silicon acrylate, epoxy acrylate, or the like. The monomer is also called a monomer, and is a state that becomes a raw material when a polymer is synthesized by a polymerization reaction. On the other hand, the oligomer is also called a low polymer, and is in a relatively low degree of polymerization with a degree of polymerization of about 2-20.

  Photopolymerization initiators are broadly classified into radical polymerization initiators that generate radicals upon receiving ultraviolet rays and cationic polymerization initiators that generate cations upon receiving ultraviolet rays. The radical polymerization initiator is used for acrylic monomers and oligomers, and the cationic polymerization initiator is used for epoxy monomers and vinyl ether monomers and oligomers. Furthermore, you may use the photoinitiator which consists of a mixture of a radical polymerization initiator and a cationic polymerization initiator.

  The radical polymerization initiator is roughly classified into a hydrogen abstraction type and an intramolecular cleavage type depending on the radical generation process. The hydrogen abstraction type is composed of, for example, benzophenone and orthobenzoyl methylbenzoate. On the other hand, the intramolecular cleavage type includes, for example, benzoin ether, benzyldimethyl ketal, α-hydroxyalkylphenone, α-aminoalkylphenone, methyl oxobenzoylbenzoate (OBM), 4-benzoyl-4′-methyldiphenyl sulfide. (BMS), isopropylthioxanthone (IPTX), diethylthioxanthone (DETX), ethyl 4- (diethylamino) benzoate (DAB), 2-hydroxy-2-methyl-1-phenyl-propan-one, benzyldimethyl ketal (BDK), It consists of 1,2α hydroxyalkylphenone.

Moreover, a cationic polymerization initiator consists of diphenyl iodonium salt etc. as an example.
In the present specification, the “photopolymerization initiator” is not limited to those having the ability to initiate the photopolymerization reaction, but changes depending on the contribution of the initial photopolymerization initiator to the photopolymerization reaction. It is also used in the sense of including substances that no longer contribute to the initiation of the photopolymerization reaction due to the absence of monomers or oligomers that are subject to the photopolymerization reaction. Here, the photopolymerization initiator after contributing to the photopolymerization initiation reaction often retains almost the original molecular size or is divided into two or more molecules, Bonded to the end of the polymer.

  As described above, the inventors of the present application can observe that the photopolymerization initiator itself contained in the ultraviolet curable resin 12 correlates with the state of the ultraviolet curable resin 12 (for example, the degree of curing) in response to ultraviolet irradiation. It was found to emit fluorescence.

  More specifically, the inventors of the present application analyzed a spectrum analyzer for the wavelength of light emitted when each of the typical ultraviolet curable resins (total 22 types) was irradiated with excitation ultraviolet light 50 having a wavelength of 365 nm. It investigated using. As a result, it was confirmed that light (fluorescence) having a wavelength longer than the wavelength of the excitation ultraviolet ray 50 was emitted from any ultraviolet curable resin.

Here, the photopolymerization initiator contained in the ultraviolet curable resin has the following properties.
(1) The ability (quantum yield, molar extinction coefficient) to generate active species (radicals, acids, etc.) for initiating the polymerization reaction is high.

(2) Generate highly reactive active species.
(3) The spectrum region of the excitation energy for exhibiting the ability to generate active species is the ultraviolet region.

  That is, a photopolymerization initiator having a molecular structure that easily absorbs ultraviolet rays is adopted, and energy (electrons) due to the absorption of ultraviolet rays is easily given to other molecules.

  On the other hand, monomers and oligomers, which are the main components of ultraviolet curable resins, are considered to hardly emit fluorescence because they have a structure in which carriers (electrons) do not move smoothly in the molecule.

  Therefore, the inventors of the present application have concluded that the photopolymerization initiator is essentially a substance having a property of emitting fluorescence upon receiving ultraviolet rays. The ultraviolet irradiation system according to the present embodiment measures the fluorescence emitted from this photopolymerization initiator, and measures the cured state of the ultraviolet curable resin 12 from the measurement result.

(Configuration of measuring device)
FIG. 2 is a schematic configuration diagram of measuring apparatus 100 according to the embodiment of the present invention.

  With reference to FIG. 2, the control unit 102 includes a CPU (Central Processing Unit) 40, a panel unit 38, a storage unit 46, and an interface unit (I / F) 48. The panel unit 38 includes a display unit 42 and an operation unit 44 arranged on the same plane.

  The CPU 40 is a control device that controls the entire processing of the measuring apparatus 100, and implements the following processing by reading and executing a program stored in advance in a ROM or the like. Specifically, the CPU 40 irradiates the ultraviolet curable resin 12 with the excitation ultraviolet ray 50 in accordance with a command given from the user or the like via the operation unit 44, and calculates the amount of the fluorescence 52 obtained by the irradiation of the excitation ultraviolet ray 50. It is displayed on the display unit 42 as an initial value. The measurement of the initial fluorescence amount is executed before the ultraviolet curable resin 12 is irradiated with the curing ultraviolet ray 54.

  With reference to the initial fluorescence amount displayed on the display unit 42, the user operates the operation unit 44 to set a determination criterion for the target ultraviolet curable resin 12. The CPU 40 stores the determination criterion from the user in the storage unit 46. Then, after starting the irradiation of the curing ultraviolet ray 54 to the ultraviolet curable resin 12, the CPU 40 causes a curing reaction in the ultraviolet curable resin 12 in accordance with a predetermined criterion based on the detected amount (intensity) of the fluorescence 52. Judge whether or not. Then, the CPU 40 causes the display unit 42 to display the determination result and the amount of fluorescence 52 acquired.

  The CPU 40 irradiates the curing ultraviolet ray 54 (irradiation ON / OFF) based on an irradiation state signal (irradiation start signal and irradiation end signal) given from the light source unit 202 (FIG. 1) via the interface unit 48. Judging.

  The display unit 42 is a display device for displaying information related to the curing reaction to the user. As an example, the display unit 42 includes a display such as an LCD (Liquid Crystal Display) or a CRT (Cathode-Ray Tube). .

  The operation unit 44 is a command input device that receives an operation command from a user, and includes, for example, a switch, a touch panel, a mouse, or the like, and outputs an operation command according to the user operation to the CPU 40.

  The storage unit 46 is a device that can store a program executed by the CPU 40 and past temporal behavior in a nonvolatile manner, and includes a hard disk, a flash memory, and the like as an example.

  The interface unit 48 is a device for mediating communication between the external device and the CPU 40. As an example, the interface unit 48 includes a digital-analog conversion unit (DAC), USB (Universal Serial Bus), Ethernet (registered trademark), or the like. The

  On the other hand, the fluorescence measurement head unit 104 includes a light projecting drive circuit 20, a light projecting element 22, a half mirror 24, an optical filter 26, a light receiving element 28, a high pass filter circuit (HPF: High Pass Filter) 30, The amplifier circuit 32, a sample and hold circuit (S / H: Sample and Hold) 34, and an analog-to-digital converter (ADC) 36 are included.

  The light projecting drive circuit 20 supplies drive power for generating the excitation ultraviolet light 50 in the light projecting element 22 in accordance with a control command from the CPU 40. It is desirable that the intensity of the excitation ultraviolet ray 50 periodically changes so that the amount of fluorescence emitted from the photopolymerization initiator can be measured more accurately. Therefore, the light projecting drive circuit 20 supplies the light projecting element 22 with drive power that changes in a predetermined cycle during a period in which a control command instructing irradiation is given from the CPU 40.

  The light projecting element 22 is an ultraviolet light source that generates excitation ultraviolet light 50, and typically includes an ultraviolet LED. The main emission peak of the excitation ultraviolet ray 50 generated in the light projecting element 22 is preferably 365 nm.

  The excitation ultraviolet ray 50 generated by the light projecting element 22 in response to the driving power supplied from the light projecting drive circuit 20 passes through the half mirror 24 and converges to a predetermined irradiation position. In response to the excitation ultraviolet ray 50, the ultraviolet curable resin 12 (FIG. 1) generates fluorescence 52 corresponding to the cured state. A part of the generated fluorescence 52 propagates in a propagation path substantially the same as the propagation path of the excitation ultraviolet ray 50 in the opposite direction to the excitation ultraviolet ray 50 and enters the half mirror 24.

  The half mirror 24 changes the propagation direction of the fluorescence 52 downward in the drawing. Then, the fluorescence 52 passes through the optical filter 26 and enters the light receiving element 28. That is, the half mirror 24 separates the excitation ultraviolet ray 50 from the light projecting element 22 and the fluorescence 52 emitted from the ultraviolet curable resin 12. As described above, the half mirror 24 separates the excitation ultraviolet ray 50 and the fluorescence 52 propagating on the same optical path, so that the fluorescence 52 having a weak intensity can be reliably detected by the light receiving element 28.

  The optical filter 26 is arranged to suppress the excitation ultraviolet ray 50 radiated from the light projecting element 22 from directly entering the light receiving element 28, and attenuates the light in the ultraviolet region while being visible. It is configured to transmit the light. As an example, the optical filter 26 includes a dielectric multilayer filter that transmits light having a wavelength of 410 nm or more.

  The light receiving element 28 is formed of a photodiode as an example, and generates an electric signal corresponding to the intensity of fluorescence incident through the half mirror 24 and the optical filter 26.

  In the ultraviolet irradiation system 1 according to the present embodiment, as shown in FIG. 1, the curing ultraviolet ray 54 may be simultaneously emitted from the light source device 200 to the ultraviolet curable resin 12. Therefore, it is considered that the fluorescence generated by the photopolymerization initiator contained in the ultraviolet curable resin 12 includes fluorescence generated by receiving the excitation ultraviolet ray 50 and fluorescence generated by receiving the curing ultraviolet ray 54. Therefore, in the present embodiment, each ultraviolet ray is separated on the frequency domain. That is, the ultraviolet ray for curing 54 mainly having a direct current (DC) component intensity and the excitation ultraviolet ray 50 including an alternating current component (as an example, a pulse-like change) in its intensity are irradiated, and the amount of fluorescence measured by this irradiation is determined. Among the signals shown, a periodic component corresponding to the intensity change period of the excitation ultraviolet ray 50 is extracted and measured as the amount of fluorescence generated by the excitation ultraviolet ray 50.

  The high-pass filter circuit 30 is a filter for extracting a periodic component (component derived from the excitation ultraviolet ray 50) from the fluorescence amount detected by the light receiving element 28, and the periodic component corresponding to the intensity change period of the excitation ultraviolet ray 50. Pass higher frequency components.

  The amplifier circuit 32 amplifies the output signal from the HPF 30 with a predetermined amplification factor (current-voltage conversion rate) and outputs the amplified signal to the sample hold circuit 34. The sample hold circuit 34 samples the output signal from the HPF 30 in synchronization with the pulse period of the excitation ultraviolet ray 50 emitted from the light projecting element 22 and holds the sampled signal value until the next sampling. As a result, a value corresponding to the maximum amplitude value of each pulse is output from the sample hold circuit 34. A signal (analog voltage signal) output from the sample hold circuit 34 is converted into a digital value by the analog-to-digital converter 36 and output to the CPU 40 as a measured value of the fluorescence amount.

  1 and 2 and the present invention, the light projecting element 22 corresponds to the “light projecting unit”, the light receiving element 28 corresponds to the “light receiving unit”, and the CPU 40 serves as the “control unit”. The display unit 42 corresponds to the “display unit”, the operation unit 44 corresponds to the “operation unit”, the storage unit 46 corresponds to the “storage unit”, and the curing ultraviolet ray 54 corresponds to “ultraviolet ray”. The excitation ultraviolet ray 50 corresponds to “other ultraviolet rays”.

(Initial fluorescence)
As described above, the initial fluorescence amount of the fluorescence 52 emitted from the ultraviolet curable resin 12 in response to the excitation ultraviolet ray 50 depends on the type of the ultraviolet curable resin 12, its deterioration state (quality), the ultraviolet irradiation condition, and the workpiece material. Etc. may vary depending on various factors.

  FIG. 3 is a diagram showing a measurement example of the amount of fluorescence generated from the ultraviolet curable resin before the ultraviolet irradiation. FIG. 3 shows the measurement of the amount of fluorescence emitted from 10 types of ultraviolet curable resins manufactured by Three Bond Co., Ltd., under the same irradiation conditions of the excitation ultraviolet ray 50. Among the ultraviolet curable resins to be measured, six types are mainly made of acrylic, and four types are mainly made of epoxy.

  Referring to FIG. 3, it can be seen that the amount of fluorescence varies depending on the material of the ultraviolet curable resin. Overall, the amount of fluorescence generated from the ultraviolet curable resin mainly composed of epoxy is larger than that of the ultraviolet curable resin mainly composed of acrylic, but some ultraviolet curable resins (for example, , “3164”).

  Thus, the amount of fluorescence emitted from the ultraviolet curable resin varies greatly depending on the type.

  In general, the amount of fluorescence generated by an ultraviolet curable resin also changes due to deterioration. In general, the ultraviolet curable resin is an anaerobic adhesive, and when left in the atmosphere for a long time (for example, several weeks), the oxygen in the atmosphere and the photopolymerization initiator are combined to cause deterioration. This deterioration reaction is a kind of curing reaction, and as the curing proceeds to the ultraviolet curable resin, the amount of generated fluorescence becomes relatively large.

  Further, fluorescence may be generated from a work that is an irradiation target of the excitation ultraviolet ray 50. Therefore, there may be a difference between the amount of fluorescence generated from the single unit of the ultraviolet curable resin 12 and the amount of fluorescence generated from the ultraviolet curable resin 12 applied to the substrate 6 or the adherend 8.

FIG. 4 is a diagram schematically showing the state of fluorescence generated by irradiation with the excitation ultraviolet ray 50.
Referring to FIG. 4, the state in which the ultraviolet curable resin 12 is applied on the substrate 6 or the adherend 8 is simply modeled. In this model, the fluorescence measurement head unit 104 is disposed vertically above the ultraviolet curable resin 12, and the excitation ultraviolet ray 50 is irradiated from the fluorescence measurement head unit 104. A part of the irradiated excitation ultraviolet ray 50 is absorbed by the ultraviolet curable resin 12, and fluorescence 52 is generated by the energy. On the other hand, the excitation ultraviolet rays 50 a that have not been absorbed by the ultraviolet curable resin 12 reach the substrate 6 or the adherend 8. Here, depending on the material of the substrate 6 or the adherend 8, there is a material that emits fluorescence upon receiving the excitation ultraviolet ray 50 a, and the fluorescence 52 a generated from the substrate 6 or the adherend 8 also enters the fluorescence measurement head unit 104. To do.

  Therefore, the amount of fluorescence received by the fluorescence measurement head unit 104 is the sum of the fluorescence generated from the ultraviolet curable resin 12 and the fluorescence generated from the substrate 6 or the adherend 8. Therefore, the initial fluorescence amount also changes depending on the intensity of the excitation ultraviolet ray 50, the amount (thickness) of the ultraviolet curable resin 12, the deterioration state (quality) of the ultraviolet curable resin 12, the irradiation condition of ultraviolet rays, and the like.

  FIG. 5 is a diagram illustrating an example of the initial fluorescence amount measured for each workpiece. FIG. 5 shows the measurement of the amount of fluorescence received when a predetermined amount of ultraviolet curable resin is applied when an electronic substrate (material: glass epoxy) or an iron plate is used as the base material. The reference point (zero point) shown in FIG. 5 is a value corresponding to the amount of fluorescence measured when the substrate is not coated with an ultraviolet curable resin and irradiated with excitation ultraviolet rays. The values shown in FIG. The value is relative to the reference point.

  Referring to FIG. 5, depending on the combination of the base material and the ultraviolet curable resin, when the ultraviolet curable resin is applied, the generated fluorescence increases, decreases, or hardly changes. You can see that This is considered to depend on the relative relationship between the amount of fluorescence emitted from the substrate itself and the amount of fluorescence emitted from the ultraviolet curable resin.

  As described above, the amount of initial fluorescence generated from the ultraviolet curable resin applied on the substrate varies depending on various factors. Therefore, in the present invention, the initial fluorescence amount having such a large change is acquired in advance, and a determination criterion based on the initial fluorescence amount can be set.

(Processing procedure)
FIG. 6 is a flowchart showing a processing procedure in cured state measuring apparatus 100 according to the embodiment of the present invention.

  Referring to FIG. 6, first, the user sets a work at a predetermined position. On the other hand, the CPU 40 of the control unit 102 in the power-on state determines the mode being selected (step S100). Here, the user operates the operation unit 44 to select “setting mode”.

  FIG. 7 is a diagram showing a display example in the “setting mode” of panel portion 38 of cured state measuring apparatus 100 according to the embodiment of the present invention. FIG. 8 is a diagram showing a display example in the “inspection mode” of panel unit 38 of cured state measuring apparatus 100 according to the embodiment of the present invention.

  The panel unit 38 is typically composed of a display to which a touch panel is added. As shown in FIG. 7, in the “setting mode”, display areas 421, 422, and 423 that function as display units and operation areas 441, 442, 443, 444, and 445 that function as operation units are arranged on the display. Is done. In the present invention, the display unit and the operation unit may be arranged on the same surface. Or a segment display etc. may be used as a display part, and a button etc. may be used as an operation part. As shown in FIG. 8, in the “inspection mode”, display areas 422 and 450 that function as a display unit and an operation area 445 that functions as an operation unit are arranged on the display.

  As shown in FIGS. 7 and 8, in either mode, the user can switch to the other mode by operating the operation area 445 of the panel unit 38.

  Referring to FIG. 6 again, when “setting mode” is selected (“setting mode” in step S100), CPU 40 determines whether or not an instruction to measure the initial fluorescence amount has been given (step S102). . Here, when the user selects the “initial fluorescence measurement” button (operation area 441), the CPU 40 gives a control command to the light projecting drive circuit 20 (FIG. 2), and the excitation ultraviolet ray 50 is applied for a relatively short time. Irradiate (step S104). The CPU 40 obtains the fluorescence amount generated from the ultraviolet curable resin 12 upon receiving the excitation ultraviolet ray 50 from the analog-digital conversion unit 36 (step S106), and displays the value on the display unit 42 as the initial fluorescence amount (step S106). Step S108). More specifically, as shown in FIG. 7, the initial fluorescence amount is displayed in the display area 421 of the panel unit 38.

  While the display area 421 of the panel unit 38 is being displayed, the user operates a set value change button (operation areas 443 and 444) to set a threshold value that is an example of a determination criterion. This threshold value is a reference value for determining whether an appropriate curing reaction has occurred in the ultraviolet curable resin 12 or whether a sufficient curing reaction has been completed in the ultraviolet curable resin 12.

  FIG. 9 is an example showing changes in the amount of fluorescence generated from the ultraviolet curable resin before and after curing. FIG. 9 shows the change in the amount of fluorescence generated from the ultraviolet curable resin for each substrate when the model “3042” manufactured by ThreeBond Co., Ltd. is used as the ultraviolet curable resin.

  Referring to FIG. 9, when an electronic substrate made of glass epoxy is used as a base material, the amount of initial fluorescence is reduced by applying an ultraviolet curable resin, and further, the curing ultraviolet ray 54 is irradiated to cause a curing reaction. When completed, it can be seen that the amount of fluorescence generated further decreases. That is, the amount of fluorescence generated upon completion of the curing reaction is reduced compared to the initial amount of fluorescence.

  On the other hand, when an iron plate is used as a base material, the amount of initial fluorescence increases by applying an ultraviolet curable resin, and when the curing reaction is completed by irradiating the curing ultraviolet ray 54, the amount of generated fluorescence further increases. I understand that That is, the amount of fluorescence generated upon completion of the curing reaction is increased compared to the initial amount of fluorescence.

  Therefore, as shown in FIG. 7, the user operates the setting value change buttons (operation areas 443 and 444) to set a threshold value as a relative value with respect to the initial fluorescence amount. This threshold value can be set in either the positive direction (+) or the negative direction (−) according to the workpiece characteristics as described above.

  Prior to setting the threshold value of the user, the CPU 40 calculates a threshold value candidate using a predetermined arithmetic expression, and displays the calculated value in the display area 422 (step S110). As this arithmetic expression, an arithmetic expression that multiplies the initial fluorescence amount by a predetermined ratio or an arithmetic expression that adds or subtracts a predetermined value to the initial fluorescence amount can be used.

  Along with the setting of the threshold value, the user sets the type of the ultraviolet curable resin. Specifically, the user operates the cursor (operation area 445) on the list of UV curable resin candidates displayed in the display area 423, and selects the type of the target UV curable resin.

  When the setting of the threshold value and type is completed and the user selects the confirm button (operation area 442), the CPU 40 sets the threshold value displayed in the display area 422 at this time (step S112). Then, the set threshold value and the type of the ultraviolet curable resin are associated with each other and stored in the storage unit 46 (step S114). The threshold value stored in the storage unit 46 can be read by designating the type of the ultraviolet curable resin.

This completes the setting of the threshold value, which is the determination criterion, and the process returns to step S100.
Subsequently, the user operates the operation area 445 of the panel unit 38 to select “inspection mode”. Then, the display on the panel unit 38 is switched to the display mode shown in FIG. Thereafter, based on the irradiation start signal from the light source device 200, the CPU 40 determines whether or not the irradiation of the curing ultraviolet ray 56 has been started on the workpiece (step S116). If irradiation of curing ultraviolet ray 56 has not been started (NO in step S116), CPU 40 waits until irradiation of curing ultraviolet ray 56 is started.

  When irradiation of curing ultraviolet ray 56 is started (YES in step S116), CPU 40 gives a control command to light projecting drive circuit 20 (FIG. 2) to start continuous irradiation of excitation ultraviolet ray 50 (step S118). ). The CPU 40 continuously acquires the fluorescence amount generated from the ultraviolet curable resin 12 upon receiving the excitation ultraviolet ray 50 from the analog-to-digital conversion unit 36 (step S120), and the acquired fluorescence amount is set as a threshold. It is determined whether or not the value has been reached (step S122). Note that reaching the threshold value means that the acquired fluorescence amount matches or exceeds the threshold value for a positive threshold value, and is acquired for a negative threshold value. This means that the amount of fluorescence emitted matches or falls below the threshold value.

  In the process of acquiring the fluorescence amount, the panel unit 38 displays a time waveform 451 of the acquired fluorescence amount as shown in FIG. The time waveform 451 of the fluorescence amount is updated as time passes. Further, in this display area 450, a display area 422 indicating a threshold value, which is a representative example of the determination criteria set in the setting mode, and a threshold line 452 are displayed at a position corresponding to this threshold value.

  If the acquired fluorescence amount has reached the set threshold value (YES in step S122), CPU 40 determines that the curing reaction in ultraviolet curable resin 12 is appropriate (step S124), and notifies that effect. The data is output to an external device via the display unit 42 or the interface unit 48.

  On the other hand, if the acquired fluorescence amount has not reached the set threshold value (NO in step S122), the CPU 40 determines the curing ultraviolet ray 56 based on the irradiation end signal from the light source device 200. It is determined whether the irradiation has ended (step S126). If the irradiation of the curing ultraviolet ray 56 has not been completed (NO in step S126), the CPU 40 determines whether or not a predetermined time has elapsed since the irradiation start of the curing ultraviolet ray 56 (step S128). If the predetermined time has not elapsed since the start of irradiation of curing ultraviolet ray 56 (NO in step S128), CPU 40 executes the processing in step S122 and subsequent steps again.

  On the other hand, if irradiation of curing ultraviolet ray 56 has been completed (YES in step S126), or if a predetermined time has elapsed from the start of irradiation of curing ultraviolet ray 56 (YES in step S128), CPU 40 performs ultraviolet curing. It is determined that the curing reaction in the resin 12 is inappropriate (step S130), and that effect is output to the external device via the display unit 42 or the interface unit 48. Then, the process ends.

  According to the embodiment of the present invention, before the curing reaction occurs in the ultraviolet curable resin, that is, before the irradiation of the curing ultraviolet ray, the ultraviolet ray curable resin is irradiated with the excitation ultraviolet ray in advance to obtain the initial fluorescence amount, and the initial fluorescence is obtained. The amount is displayed on the display. During the display of the initial fluorescence amount, a threshold value, which is an example of a determination criterion, is set according to a setting operation from the user. As a result, the user can set the threshold value while referring to the initial fluorescence amount, so that it is possible to set a determination criterion according to the initial fluorescence amount that varies depending on various factors. Therefore, it is possible to easily set an appropriate determination criterion in consideration of factors related to the curing reaction for the ultraviolet curable resin.

  Further, according to the embodiment of the present invention, the threshold value candidate is calculated by a predetermined arithmetic expression based on the initial fluorescence amount, so that the user can check the threshold value in advance while checking the threshold value. Can be set. Thereby, the threshold value can be set more quickly.

(First modification)
In the flowchart shown in FIG. 6, the configuration for determining the suitability of the curing reaction of the ultraviolet curable resin is illustrated, but the degradation of the ultraviolet curable resin itself can also be determined using the same technique. Specifically, the initial fluorescence amount of a normal ultraviolet curable resin is measured in advance, and the initial fluorescence amount is compared with the initial fluorescence amount of the target ultraviolet curable resin, or the fluorescence amount immediately after irradiation of the curing ultraviolet ray 54. The deterioration state of the target ultraviolet curable resin can also be determined based on the change characteristics.

  In other words, the UV curing is performed by comparing the determination standard set based on the initial fluorescence amount with the measured fluorescence amount in a relatively short period before the start of the irradiation of the curing ultraviolet ray 54 or immediately after the start of the irradiation. It can be determined whether the resin itself is a good product or a defective product.

  According to the first modification of the embodiment of the present invention, the deterioration state (so-called pot life) of the ultraviolet curable resin that is an anaerobic adhesive can be more appropriately managed.

(Second modification)
In the flowchart shown in FIG. 6, the configuration for determining the suitability of the curing reaction of the ultraviolet curable resin based on the threshold value is illustrated. However, the time behavior indicating the optimum curing reaction state is acquired in advance, and this time The suitability of the irradiation conditions for the ultraviolet curable resin may be determined on the basis of the behavior.

  Generally, the curing speed and finish of the ultraviolet curable resin are affected by the magnitude of the irradiation intensity of the curing ultraviolet ray in the curing reaction of the ultraviolet curable resin. Specifically, if the irradiation intensity of the curing ultraviolet ray is lower than an appropriate value, the time until the curing is completed becomes longer and the surface thereof may be tacked (sticky). On the other hand, if the irradiation intensity of the curing ultraviolet ray is higher than an appropriate value, the time until the curing is completed may be shortened and burnt (deteriorated) may remain on the surface.

  FIG. 10 is a diagram illustrating an example of temporal behavior of the curing reaction state of the ultraviolet curable resin. FIG. 10 shows the temporal behavior of the fluorescence amount when the irradiation intensity of the curing ultraviolet ray to be irradiated is changed to five types (including the optimum value) around the optimum value for the same ultraviolet curable resin. It is a thing.

  Referring to FIG. 10, by relatively increasing the irradiation intensity of the curing ultraviolet ray, the rise of the fluorescence amount (temporal change amount) immediately after the start of the irradiation of the curing ultraviolet ray becomes relatively large. Therefore, by comparing the temporal behavior of the fluorescence amount immediately after the start of the irradiation with the curing ultraviolet ray with the optimum temporal behavior shown in FIG. 10, it is possible to determine the suitability of the irradiation conditions for the ultraviolet curable resin.

  Here, as described above, since the initial fluorescence amount changes depending on various factors, the initial fluorescence amount is reflected as an “offset” in the reference temporal behavior obtained in advance, and then based on the temporal behavior. Therefore, it is preferable to determine the suitability of the irradiation conditions for the ultraviolet curable resin.

  FIG. 11 is a diagram for explaining processing in the case of determining the suitability of the irradiation conditions for the ultraviolet curable resin.

  Referring to FIG. 11, the initial fluorescence amount acquired before the irradiation of the curing ultraviolet ray is reflected as an offset to the temporal behavior corresponding to the optimal curing reaction state acquired in advance. That is, as shown in FIG. 11, the temporal behavior of the reference fluorescence amount is set by shifting the temporal change characteristic of the reference fluorescence amount by a value corresponding to the initial fluorescence amount. Is done. The suitability of the irradiation conditions for the ultraviolet curable resin is determined by comparing the reference temporal behavior set for each of the target ultraviolet curable resins with the actually measured fluorescence amount.

  According to the second modification of the embodiment of the present invention, it is possible to appropriately determine the normality of the irradiation conditions for the ultraviolet curable resin after reflecting the initial fluorescence amount.

(Third Modification)
In the above-described embodiment, the case where the user sets the threshold value or the case where the threshold value candidate is calculated by a predetermined arithmetic expression based on the initial fluorescence amount is exemplified. The threshold value may be calculated based on the characteristics. That is, the threshold value may be calculated by performing a teaching process. This teaching process is executed by the control unit 102.

FIG. 12 is a diagram for explaining teaching processing for calculating a threshold value.
Referring to FIG. 12, the CPU 40 of the control unit 102 continuously irradiates the target ultraviolet curable resin with the excitation ultraviolet ray 50 during the irradiation of the curing ultraviolet ray, and continuously applies the fluorescence amount measured by the irradiation. To get to. Then, the CPU 40 sequentially stores the temporal change (time profile) of the fluorescence amount in the storage unit 46. Then, the CPU 40 calculates the difference between the initial fluorescence amount INT of the target ultraviolet curable resin and the final fluorescence amount END after completion of the curing reaction as a threshold Th. The CPU 40 stores the calculated threshold value Th in the storage unit 46 together with the type of the ultraviolet curable resin selected in advance by the user. This stored threshold value Th is read in accordance with the selection of the type of ultraviolet curable resin selected by the user in the subsequent processing. In addition, it is performed after confirming that the ultraviolet curable resin which is the target of this teaching process is a normal one without deterioration.

  According to the third modification of the embodiment of the present invention, the threshold value can be set in consideration of actual irradiation conditions and the like by calculating the threshold value by teaching processing.

(Fourth modification)
In general, the amount of fluorescence generated from an ultraviolet curable resin has temperature dependence. Therefore, it is preferable to correct the initial fluorescence amount in consideration of the temperature at the time of acquisition.

FIG. 13 is a diagram illustrating an example of the temperature dependence of the amount of fluorescence generated from the ultraviolet curable resin.
Referring to FIG. 13, each ultraviolet curable resin has a negative temperature dependency (characteristic that the amount of light emission decreases as the temperature increases). Therefore, when the initial fluorescence amount is measured, if the temperature of the target UV curable resin is low and not sufficiently excited, the measured initial fluorescence amount is a relatively small value. Therefore, it is necessary to correct the initial fluorescence amount measured in such a state.

  FIG. 14 is a schematic configuration diagram of a measuring apparatus 100A according to a fourth modification of the embodiment of the present invention.

  Referring to FIG. 14, measuring apparatus 100 </ b> A is obtained by adding temperature detecting unit 60 for measuring the temperature of the target ultraviolet curable resin or the ambient temperature to measuring apparatus 100 shown in FIG. 2. The temperature detection unit 60 detects the target ultraviolet curable resin and the surrounding temperature, and outputs the detection result to the CPU 40. The CPU 40 corrects the initial fluorescence amount measured by the same procedure as described above based on the detected temperature, and stores the corrected initial fluorescence amount in the storage unit 46.

  Note that this temperature correction is performed by the CPU 40 selecting a temperature according to the user's type selection from the temperature dependence acquired in advance for each type of ultraviolet curable resin as shown in FIG. Is done according to

  According to the fourth modification of the embodiment of the present invention, it is possible to suppress the influence of disturbance due to the temperature factor after the measurement of the initial fluorescence amount.

(5th modification)
In the above-described embodiment, an ultraviolet irradiation system in which a cured state measuring device for measuring the cured state of the ultraviolet curable resin and a light source device for irradiating curing ultraviolet rays for promoting the curing reaction of the ultraviolet curable resin are separately provided. However, a single light source may be used to exert the effects of excitation ultraviolet light and curing ultraviolet light. That is, you may make it incorporate the function of a light source device in a hardening condition measuring apparatus.

  FIG. 15 is a schematic configuration diagram of a measuring apparatus 100B according to a fifth modification of the embodiment of the present invention.

  Referring to FIG. 15, measuring apparatus 100 </ b> B irradiates ultraviolet rays having irradiation intensity corresponding to excitation ultraviolet ray 50 and curing ultraviolet ray 54. According to this configuration, since the intensity of the ultraviolet light irradiated from the measuring apparatus 100B is relatively large, there is a possibility that a curing reaction is caused to the ultraviolet curable resin when the ultraviolet light for measuring the initial fluorescence amount is irradiated. is there. Therefore, there is a possibility that the irradiation condition may be different from the original irradiation condition of ultraviolet rays.

  Therefore, it is necessary to suppress the ultraviolet rays irradiated at the time of measuring the initial fluorescence amount to such an extent that no curing reaction occurs in the ultraviolet curable resin. As a configuration for suppressing the irradiation intensity in this way, it is preferable to irradiate ultraviolet rays intermittently at a predetermined cycle as an example.

  FIG. 16 is a diagram illustrating an irradiation pattern of ultraviolet rays at the time of measuring the initial fluorescence amount in measurement apparatus 100B according to the fifth modification of the embodiment of the present invention.

  Referring to FIG. 16, when measuring the initial fluorescence amount of the target ultraviolet curable resin, the CPU 40 (FIG. 15) is configured to intermittently irradiate ultraviolet rays at a predetermined duty (Δt / T). A control command is output to the light projecting drive circuit 20. By such intermittent irradiation, the irradiation intensity irradiated to the ultraviolet curable resin is substantially suppressed to (Δt / T) times the maximum irradiation intensity.

  According to the fifth modification of the embodiment of the present invention, it is possible to appropriately measure the initial fluorescence amount even in a simplified ultraviolet irradiation system using a common ultraviolet source.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic block diagram of an ultraviolet irradiation system provided with the hardening condition measuring apparatus according to embodiment of this invention. It is a schematic block diagram of the measuring apparatus according to embodiment of this invention. It is a figure which shows the example of a measurement of the fluorescence generation amount from the ultraviolet curable resin before ultraviolet irradiation. It is a figure which shows roughly the generation | occurrence | production state of the fluorescence by irradiation of the excitation ultraviolet rays 50. FIG. It is a figure which shows the example of the initial stage fluorescence amount measured according to the workpiece | work. It is a flowchart which shows the process sequence in the hardening state measuring apparatus according to embodiment of this invention. It is a figure which shows the example of a display in the "setting mode" of the panel part of the hardening state measuring apparatus according to embodiment of this invention. It is a figure which shows the example of a display in the "inspection mode" of the panel part of the hardening state measuring apparatus according to embodiment of this invention. It is an example which shows the change of the fluorescence amount generate | occur | produced from the ultraviolet curable resin before and behind hardening. It is a figure which shows an example of the time behavior of the hardening reaction state of ultraviolet curable resin. It is a figure for demonstrating the process in the case of determining the suitability about the irradiation conditions with respect to ultraviolet curable resin. It is a figure for demonstrating the teaching process for calculating a threshold value. It is a figure which shows an example of the temperature dependence of the fluorescence amount which generate | occur | produces from ultraviolet curable resin. It is a schematic block diagram of the measuring apparatus according to the 4th modification of embodiment of this invention. It is a schematic block diagram of the measuring apparatus according to the 5th modification of embodiment of this invention. It is a figure explaining the irradiation pattern of the ultraviolet-ray at the time of the measurement of the initial amount of fluorescence in the measuring apparatus according to the 5th modification of embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Ultraviolet irradiation system, 6 base material, 8 adherend, 12 ultraviolet curable resin, 20 light projection drive circuit, 22 light projection element, 24 half mirror, 26 light filter, 28 light receiving element, 30 high-pass filter circuit, 32 amplifier circuit , 34 Sample hold circuit, 36 Analog / digital conversion unit, 38 Panel unit, 42 Display unit, 44 Operation unit, 46 Storage unit, 48 Interface unit, 50, 50a Excitation ultraviolet ray, 52, 52a Fluorescence, 54 Curing ultraviolet ray, 60 Temperature Detection unit, 100, 100A, 100B Curing state measurement device (measurement device), 102 control unit, 104 fluorescence measurement head unit, 200 light source device, 202 light source unit, 204 irradiation head unit, 421, 422, 423 display area, 441 442, 443, 444, 445 Operation area.

Claims (8)

A cured state measuring device for measuring a cured state of an ultraviolet curable resin containing a main agent composed of at least one of a monomer and an oligomer and a photopolymerization initiator,
A light projecting unit for generating ultraviolet rays for activating the ultraviolet curable resin;
A light receiving unit that receives the ultraviolet light and receives fluorescence emitted from the photopolymerization initiator;
A control unit;
A display unit;
With an operation unit,
The controller is
Mode switching means capable of selecting either a setting mode or an inspection mode in accordance with a setting operation from the operation unit;
Initial value display means for displaying the amount of fluorescence received by the light receiving unit as an initial value on the display unit when the ultraviolet curable resin is irradiated on the ultraviolet curable resin in the setting mode;
A determination criterion setting means for setting a determination criterion according to a setting operation from the operation unit during the display of the initial value in the setting mode;
In the inspection mode, when the ultraviolet curable resin is irradiated to the ultraviolet curable resin, based on the amount of fluorescence received by the light receiving unit, whether the ultraviolet curable resin has undergone a curing reaction according to the determination criterion. A curing state measuring device, comprising: a determination means for determining whether or not.   The cured state measuring device according to claim 1, wherein the control unit further includes a determination criterion candidate calculation unit that calculates the determination criterion candidate according to a predetermined arithmetic expression based on the initial value. The cured state measuring device further includes a storage unit,
The controller is
Type setting means for setting the type of the ultraviolet curable resin according to the setting operation from the operation unit,
The cured state measuring device according to claim 1, further comprising: a determination criterion storage unit that stores the set determination criterion in the storage unit in association with the type of the ultraviolet curable resin.   The control unit includes a teaching means for calculating the determination criterion based on the initial value and a final value that is the amount of the fluorescence obtained by irradiating the ultraviolet light after completion of the curing reaction of the ultraviolet curable resin. Furthermore, the hardening state measuring apparatus of any one of Claims 1-3 included.   The teaching means is obtained by continuously irradiating the ultraviolet curable resin with the ultraviolet rays when the ultraviolet curable resin is continuously irradiated with other ultraviolet rays for accelerating the curing reaction of the ultraviolet curable resin. The curing state measuring apparatus according to claim 4, wherein the initial value and the final value are acquired based on a temporal change in the amount of fluorescence to be obtained.   The said control part judges the quality of the said ultraviolet curable resin based on the quantity of the said fluorescence obtained by irradiating the said ultraviolet curable resin to the said ultraviolet curable resin, The hardening of any one of Claims 1-5. Condition measuring device.   The cured state measuring apparatus according to claim 1, wherein the determination criterion is a threshold value. A cured state measuring method for measuring a cured state of an ultraviolet curable resin containing a main agent composed of at least one of a monomer and an oligomer and a photopolymerization initiator using a cured state measuring device,
The cured state measuring device is
A light emitting unit that generates ultraviolet rays;
A light receiving portion for receiving fluorescence;
A display unit;
With an operation unit,
The cured state measuring method is:
Selecting one of a setting mode and an inspection mode according to a setting operation from the operation unit;
Irradiating the ultraviolet curable resin with the ultraviolet rays from the light projecting unit in the setting mode;
In the setting mode, receiving the fluorescence emitted from the photopolymerization initiator in response to the ultraviolet light by the light receiving unit,
In the setting mode, displaying the amount of the fluorescence received by the light receiving unit on the display unit as an initial value;
Setting a determination criterion according to a setting operation from the operation unit during the display of the initial value in the setting mode;
Irradiating the ultraviolet curable resin with the ultraviolet rays from the light projecting unit in the inspection mode;
Determining in the inspection mode whether or not a curing reaction in accordance with the criterion is occurring in the ultraviolet curable resin based on the amount of fluorescence received by the light receiving unit. .

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