JPH04115143A - Detecting device for coating condition of coating agent - Google Patents

Abstract

PURPOSE:To eliminate labor for judging reflected light received with a photo detecting section by an image processing by a method wherein the reflected light from a surface coated with a coating agent of a projection light is received with the photo detecting section and the reflected light is checked to see whether it exceeds a fixed value or not to judge the propriety thereof. CONSTITUTION:A coating agent 13 is applied on a coating surface 11 by a coating nozzle 12 with a reflectivity thereof differing from the coating surface 11. A range below a fixed beam diameter is determined and a beam light 26 so set that an error range of a distance between a projecting section 22 and the coating surface in detection is held within the range determined is projected onto the coating agent 13 applied. The reflected light of the projection light from the surface 11 coated with the coating agent is received with a photo detecting section 31 and a judging section 41 determines whether the reflected light received with the photo detecting section 31 exceeds a fixed value or not. This allows the saving of labor for judging the reflected light received with the photo detecting section 31 by an image processing while enabling correct judgment as far as any error is held below the fixed beam diameter even if generated in the distance between the coating surface to be measured and the projecting section depending on an object to be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a coating state detection device for detecting the state of adhesive or other coating applications.

The coating agent may need to be applied continuously or in a fixed width, and in that case, it is necessary to detect whether or not the coating agent is applied within a predetermined error range. In general, there is no problem with the coating state if the width is greater than a predetermined value, but an error occurs if the width is less than the predetermined value or if the coating is interrupted. The coating agent coating state detection device according to the present invention is a detection device suitable for these detections.

(Prior Art) When detecting the suitability of the coating width of a coating agent, a method can be considered in which the coating width is detected and calculated to determine whether the width is within an error range. For example, a COD camera receives the reflected light from the light emitting part on the coating surface, obtains an image of the coating surface by image processing, and calculates the coating width of the coating agent from the image.
This method determines whether the coating width is within the error range.

(Problems to be Solved by the Invention) However, this method requires an expensive device such as a COD camera in addition to the light emitting unit, and also has problems in guaranteeing accuracy.

(Means for Solving the Problem) Therefore, the inventor has provided a coating nozzle that applies a coating agent having a reflectance different from that of the coating surface onto a coating surface, a light projecting section that projects light onto the coated coating agent, It is characterized by comprising a light receiving section that receives the reflected light from the surface coated with the coating agent of the emitted light, and a judgment section that judges suitability by distinguishing whether the reflected light received by the light receiving section exceeds a certain amount. We have proposed a coating state detection device for coating agents. Furthermore, in this coating state detection device, a range is set for the emitted beam light within a certain beam diameter, and the error range of the distance between the light emitting part and the coating surface at the time of detection is within that range. Provided is an apparatus for detecting the coating state of a coating material according to claim 1, which is set to fall within a range. Furthermore, in this coating state detection device, a range is set for the emitted beam light within a certain beam diameter, and the error range of the distance between the light emitting part and the coating surface at the time of detection is within that range. Claim 2, wherein the setting that falls within the range is a setting by a condensing lens fixed to the light projecting section.
The present invention provides a coating state detection device for a coating agent as described in 1. Furthermore, a coating material with a reflectance different from that of the coated surface is applied onto the coated surface, and a range of beam diameter below a certain level is established, and the error range of the distance between the light emitter and the coated surface during detection is within that range. A beam of light that is set so as to fall within the range of Provided is a method for detecting a coating state of a coating agent, characterized in that a determining unit distinguishes whether the amount is above a certain level.

(Function) A coating nozzle that applies a coating agent with a different reflectance from the coating surface onto the coating surface, a light projector that emits light onto the applied coating agent, and a reflection of the emitted light from the coating agent application surface. In the case of a coating agent application state detection device comprising a light receiving section that receives light and a judgment section that determines suitability by distinguishing whether or not the reflected light received by the light receiving section is a certain amount or more, and A coating material that has a reflectance different from that of the coated surface is applied to the surface, and a range is established within which the beam diameter is less than a certain value, and a range within which the error range of the distance between the light emitting part and the coated surface during detection falls within that range. A beam of light set so that In the case of a method for detecting the coating state of a coating agent, which is characterized by distinguishing whether or not the coating agent is applied by a determining unit, a coating agent having a reflectance different from that of the coating surface is applied to the coating surface by a coating nozzle. do.

Next, the light projecting section projects light onto the applied coating agent. Next, the light receiving section receives the reflected light that is reflected from the coated surface. The determining section determines whether the reflected light received by the light receiving section is equal to or greater than a certain amount, and if the reflected light is equal to or greater than a certain amount, it is determined to be appropriate or not. Therefore, there is no need to perform image processing to determine the reflected light received by the light receiving section.

If you set a range for the emitted beam light that is less than a certain beam diameter and set it so that the error range of the distance between the light emitting part and the coating surface at the time of detection falls within that range, the measurement Even if an error occurs in the distance between the coating surface and the light projecting unit depending on the object to be measured, as long as the error is within a certain beam diameter, appropriate judgment can be made.

The light emitting part should be set so that the emitted beam light has a range of a certain beam diameter or less, and the distance between the light emitting part and the coating surface at the time of detection is within the error range or within that range. When the setting is made using a condensing lens fixed to , it is easy to provide the projected light beam with a range of a certain beam diameter or less.

(Embodiment) An embodiment will be described in accordance with FIG. 1 which shows a front view of the present invention in use, FIG. 2 which shows a schematic diagram of the operating state, and FIG. 3 which shows a partially enlarged projection beam. explain.

(11) is the coated surface. In this embodiment, the coating surface (IJ) is made of an unpainted roof of an automobile body, but it may also be made of a copper plate or a steel plate treated with anti-corrosion treatment or coated with paint.

(12) C. Application nozzle. The applicator nozzle (12) is fixed to the Rohot arm (not shown), and as shown in Figure 1, from the tip, a one-component epoxy resin adhesive consisting of a black paste, which is the applicator (13), is applied. The adhesive is set to be discharged in the desired amount. Adhesob consists of synthetic resin adhesives in liquid, solid, and paste forms. These adhesives are selected so that the reflectance and brightness of the projected light are different from those of the coated surface (11), that is, there is a difference in brightness. In this example, since it is black, it is an adhesive with a lower reflectance than the metallic color of the coating surface (11).

(21) is a sensor. The sensor (21) is for detecting whether or not the coating agent (13) has been applied to the coating surface (11), and is located behind the coating nozzle (12) in the direction of movement as shown in FIG. It is attached via a metal fitting (14) so that the tip faces above the applied coating agent (13). The sensor (21) is provided with a light projecting section (22) and a light receiving section (31) as shown in FIG. On the light projecting unit (22) side, a light projecting circuit (23) and a light projecting circuit (23
) A light emitting diode (24) that emits light according to a signal from
, by fixing the light emitting diode (24) to the light emitting end of the light emitting diode (24), the light emitted from the light emitting diode (24) is converted into a projection beam (26).
) for projecting light in the direction of the operating area A (25)
will be established. On the light receiving part (31) side of the sensor (21),
The received light beam (38) is reflected light from the operating area (27).
), a light-receiving lens (32) that receives light
It has a light-receiving element (33) that receives the reflected light collected by the light receiving element (33). The light receiving elements (33) are made of phototransistors and the like, and are used in series in this embodiment. Light receiving element (3
3) is further connected to a light receiving circuit (34) to convert the optical signal into an electrical signal and receive it. The light receiving circuit (34) is further provided with a sensitivity adjustment (35) and an operation display (36) for displaying whether the operating state of the light receiving element (33) is appropriate. (37) is a circuit adjustment knob for the light emitting lens (25) and the light receiving lens (3).
2) Adjust the mutual angle with

(41) is a determination unit. The determination unit (41) is connected to the light receiving circuit (34). (42) is a display section, which is connected to the judgment section (41).

As shown in FIG. 3, the projected light beam (26) has an effective detection distance range that is less than or equal to a certain beam diameter a. In this embodiment, the light emitting part (22) and the light receiving part (31)
) is a so-called mark sensor. However, when a so-called mark sensor is used as a light emitting unit, the lens that prevents the spread of the emitted light beam in the mark sensor has the effect of preventing the deterioration of sensing ability due to changes in the detection distance, but it is only possible to detect at a fixed position. Since the aim is to narrow down the search results by allowing for errors within a certain distance, it is impossible.

The range is the effective distance for detection, and since the coated surface (11), which is the object to be detected, is within this range, it is possible to detect the coating state of the coating material (13) applied to the coated surface (11). Yes, and constitutes operating area A. The range that is the effective detection distance is adjusted by a projection lens that is a fixed focus lens in this embodiment.

Therefore, the operating region A is set by rotating the circuit adjustment knob (37) or by installing the sensor (21) at a predetermined position. In this example, the setting is the application surface (]1)
If the coating agent (13) is properly applied, the coating agent (13) is The distance and angle are set so that the projected light beam (26) does not extend beyond the uncoated surface (11).

Next, a coating agent (13) having a reflectance different from that of the coating surface (11) is applied to a predetermined coating location on the coating surface (11) according to the operation of the robot. Next, apply the coating surface (11
) A projection beam (26) is projected from above.

The projection beam (26) has a range within a certain beam diameter a, and the displacement range of the distance between the projection lens (25) and the coating surface (11) at the time of detection is within that range. It is set to fall within the range.

Then, the light is projected onto the applied coating agent (13), and the light receiving section (31) receives the reflected light from the coating agent coated surface (1'') of the projected light beam (26). If a certain amount or more of the liniment (13) has been applied, that is, if the adhinop is not interrupted or too thin, and it is spread sufficiently wide than the normal amount, apply the liniment (]3). The light receiving element (33) receives the reflected light from the uncoated surface (11).
The reflected light remains low as no light is received. However, the application of the coating agent (13) is not sufficiently applied, that is, the application of the coating agent (13) is interrupted, and the coating surface (11) is exposed, or the coating width is too narrow. is exposed, the projected beam (26) is reflected by the coating surface (11) that is not covered with the coating agent (13), and the coating surface (11) that is not covered with the coating agent (13) reflects.
) as reflected light that is stronger than the reflected light from the light receiving element (33
) is received.

These differences in the amount of received light are received by the determination unit (41) as electrical signals through the light receiving circuit (34). Then, the current when the reflected light is received in a normal application state stored in advance is compared with the current received at the time of detection, and it is determined whether the reflected light received by the light receiving part (31) is more than a certain amount. The determination unit (4]) makes the distinction. When it is determined to be normal, that fact is displayed on the display section (42), and when it is determined that it is abnormal, it is also displayed to that effect.

If the reflectance of the coating agent (13) and the coating surface (11) are opposite, it is determined that the reflected light is normal when there is a lot of reflected light, and it is determined that it is abnormal when there is a small amount of reflected light.

(Effects of the Invention) Therefore, there is provided a coating nozzle that applies a coating agent having a reflectance different from that of the coating surface onto a coating surface, a light projecting section that projects light onto the applied coating agent, and a coating agent application surface of the light projection. In the case of a coating state detection device comprising a light receiving section that receives reflected light from the light receiving section, and a judgment section that determines suitability by distinguishing whether or not the reflected light received by the light receiving section is above a certain amount, Then, apply a coating agent having a reflectance different from that of the coated surface to seven areas on the coated surface, provide a range below a certain beam diameter, and make sure that the displacement range of the distance between the light emitting part and the coated surface at the time of detection is within that range. A beam of light that is set to fall within the range of In the case of a method for detecting the coating state of a coating agent, which is characterized by a determination section that distinguishes whether or not the amount is above a certain amount, there is no need to perform image processing on the reflected light received by the light receiving section to make a determination. .

Furthermore, if a range is set for the emitted beam light that is less than a certain beam diameter, and the displacement range of the distance between the light emitting part and the coating surface at the time of detection is set within that range, Even if an error occurs in the distance between the coating surface to be measured and the light projecting unit depending on the object to be measured, an appropriate judgment can be made as long as the error is within a certain beam diameter.

Either set a range for the emitted beam light that is less than a certain beam diameter, and set it so that the displacement range of the distance between the light emitting part and the coating surface at the time of detection falls within that range. When the setting is made using a condensing lens fixed to , it is easy to provide the projected beam with a range of a certain beam diameter or less.

[Brief explanation of the drawing]

FIG. 1 is a front view of a state of use according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the same operating pair, and FIG. 3 is a partially enlarged view of the same projection beam. (11)・Applying surface, (12)・Applying nozzle, (13)
... Coating agent, (22) ... Light emitting part, (31) - Light receiving part, (41) ... Judgment Department Patent applicant Central Jidosha Co., Ltd. Representative patent attorney Tadashi Yasuhara 2 Masayoshi Yasuhara

Claims (4)

[Claims] (1) A coating nozzle that applies a coating agent with a different reflectance from the coating surface onto the coating surface, a light projector that projects light onto the applied coating agent, and reflected light from the coating agent application surface of the projected light. What is claimed is: 1. A coating state detection device for a coating material, comprising: a light-receiving section that receives reflected light; and a determining section that determines suitability by distinguishing whether reflected light received by the light-receiving section is equal to or greater than a certain amount. (2) A patent that provides a range within a certain beam diameter for the projected light beam, and sets the error range of the distance between the light projecting part and the coated surface at the time of detection to be within that range. A coating state detection device for a coating agent according to claim 1. (3) Setting a range within a certain beam diameter for the projected beam light, and setting the error range of the distance between the light projecting part and the coating surface at the time of detection to fall within that range. 3. The coating agent coating state detection device according to claim 2, which is set by a condensing lens fixed to the light projecting section. (4) A coating material with a reflectance different from that of the coated surface is applied on the coated surface, and a range with a certain beam diameter or less is provided, and the error range of the distance between the light emitter and the coated surface during detection is within that range. A beam of light that is set to fall within the range of A method for detecting a coating state of a coating agent, characterized in that a determining unit determines whether the amount is above a certain amount.