JPS6293605A - System for non-contact detection of transparent plate - Google Patents

Abstract

PURPOSE:To make it possible to certainly detect the presence of a transparent plate, by using an optical fiber transmission type photoelectric switch and setting a pair of optical fibers at a position where the incident angle of an optical axis to the transparent plate comes to an incident angle generating total reflection or more. CONSTITUTION:An optical fiber transmission type photoelectric sensor main body 3 is mounted to a base 1 through a direct-acting actuator 2. Two first and second pipes 4, 5 are led out from the photoelectric sensor main body 3 and first and second optical fibers 6, 7 are respectively passed to the light emitting and receiving sides of the photoelectric sensor main body 3. These optical fibers 6, 7 are arranged so that the leading end parts thereof are opposed so as to hold a transparent plate 8 therebetween and the incident angle of an optical axis 9 comes to an incident angle generating total reflection or more. By this method, it can be certainly detected whether the transparent plate 8 having a refractive index different from that of air is present at a predetermined position.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transparent plate non-contact detection type, in particular, a section in which transparent plates having a different refractive index from air are lined up at intervals equal to or larger than the diameter of an optical 7-eyeper, A transparent plate valve fI that non-contact detects whether each transparent plate exists at a predetermined location. Regarding touch detection method.

[Conventional technology]

The conventional transparent plate non-contact detection force type includes a base, a linear actuator with one end attached to the base, and a linear actuator attached to the other end of the linear actuator, and the detection surface is attached to the transparent plate to be detected. and a reflective photoelectric sensor directed toward the end surface.

A method in which the distance between the reflective photoelectric sensor and the transparent plate to be detected is set within the detection range, and the reflected light from the end face of the transparent plate among the light emitted from the reflective photoelectric sensor is received by the reflective photoelectric sensor. It is.

? : The conventional transparent plate non-aside detection method for KVC will be explained in detail with reference to the drawings.

FIG. 3 is a perspective view showing an example of a conventional transparent plate non-contact detection force type.

In the transparent plate non-contact detection force type shown in FIG. 3, the presence or absence of the transparent plate 8 is confirmed by bringing the reflective photoelectric sensor lO close to the end face of the transparent plate 8 using the linear actuator 2 and detecting the end face. .

[Problem that the invention seeks to solve]

The conventional transparent plate non-contact detection device described above uses a reflective photoelectric center t10 as shown in FIG. 2 to detect the hot water level of the transparent plate 8. If the angle between the 4rki of the plate 8 and the other surface is different for each transparent plate 81, the light emitted from the reflective photoelectric sensor 10 will not return to the reflective photoelectric sensor 10, resulting in poor detection rate. There was a drawback.

[Means for Solving the Problems] The transparent plate non-contact detection method of the present invention includes a base, a linear actuator having one end attached to the base, and an 81
1. An optical fiber bulge type photoelectric sensor length body attached to the other end of the linear motion aguchiuator, and one end of the optical fiber bulge type photoelectric sensor body attached to the other end of the linear motion aguchiuator and the same length of the other end. is perpendicular to the linear actuator, and the first pipe has one end connected to the optical fiber transmission type photoelectric sensor body and the other end oriented perpendicular to the linear actuator. and a second pipe facing the tip of.

A first optical fiber passes through the first pipe and is connected to the light emitting side Km of the original fiber type transmission type photoelectric sensor main body, and an optical fiber type diode is connected to the light emitting side Km of the original fiber type transmission type photoelectric sensor body, and the optical fiber type di
Connected to the light receiving side of the suitable source power sensor body, its tip and the tip of the first source fiber? It is composed of a second optical fiber whose incident angle of the connecting optical axis is equal to or greater than the incident angle at which total reflection occurs to the transparent plate to be detected.

〔Example〕

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
It is an enlarged view of the transparent plate detection part shown in the figure.

The transparent plate non-contact detection method shown in FIG. a centimeter main body 3, a first pipe 4 whose one bubble is connected to the optical fiber transmission type photoelectric sensor main body 3 and whose other end is perpendicular to the linear actuator 2, and an optical fiber transmission type photoelectric sensor main body. 3, and the other end is perpendicular to the linear actuator 2. A second pipe 5 faces the tip of the first pipe 4, and an optical fiber is connected to the inside of the first pipe 4. The first optical fiber 6 is connected to the light emitting side of the transmission type photoelectric sensor body 30, and the light 7 passes through the second pipe 5 and is connected to the light receiving side of the Aiper type transmission type photoelectric sensor body 3. The second optical fiber 7 is configured such that the angle of incidence of the original axis 9 connecting the tips of the first original fiber 6 is greater than the angle of incidence at which total reflection occurs on the transparent plate 8 to be detected.

Next, the operation will be explained.0 When the linear actuator 2 is extended, the first original fiber 6 and the second optical fiber 7 following the optical fiber transmission type charging switch main body 3 detect the transparent plate, respectively. 8
The angle of incidence of the optical axis 9 connecting the optical fiber 6 of $1 and the second optical fiber 7 with respect to the a plate 8 to be detected is set to be greater than the angle of incidence for total reflection. When extended, as shown in FIG.
The angle of incidence of the original axis 9 on the transparent plate 8 is greater than the angle of incidence at which total reflection occurs.

Therefore, light exiting the first optical fiber 6 enters the second optical fiber 7 when the transparent plate 8 is not present.

When the transparent plate 8 is present, the light emitted from the first optical fiber 6 is reflected by the transparent plate 80 due to the difference in refractive index between the transparent plate 8 and air.
It is reflected by the surface and does not enter the second original fiber 7.

That is, when the light emitted from the first original fiber enters the second optical fiber 7, the transparent plate 8 is not present.

When no light enters, the transparent plate 8 is present. [Effects of the Invention] The transparent plate non-contact detection device of the present invention uses a 7-eye μ-type transmission type photoelectric switch, By setting the first optical fiber and the second original fiber at a position where the incident angle of the shaft is greater than or equal to the incident angle of total reflection, there is an effect that the presence or absence of a transparent plate can be reliably detected.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
FIG. 3 is an enlarged view of the transparent plate detection section shown in the figure, and FIG. 3 is a perspective view showing one conventional embodiment. l...Base, 2...Linear actuator, 3...Optical 7-eye μ type transmission type photoelectric sensor body, 4...1st Pipe, 5...Second pipe, 6...First original fiber, 7...
...Second optical fiber, 8...Transparent plate, 9...
...Optical axis, 10...Reflection type photoelectric centimeter, 1
Technique: Reflected light.

Claims (1)

[Claims] a base, a linear actuator with one end attached to the base, an optical fiber transmission photoelectric sensor body attached to the other end of the linear actuator, and one end connected to the optical fiber transmission photoelectric sensor body. and the other end thereof is perpendicular to the linear actuator.
a second pipe, one end of which is connected to the optical fiber transmission type photoelectric sensor body, the other end of which is perpendicular to the linear actuator, and which faces the tip of the first pipe; a first optical fiber that passes through the first pipe and is connected to the light emitting side of the optical fiber type transmission type photoelectric sensor body; A second optical fiber connected to the light receiving side and having an incident angle of an optical axis connecting its tip and the tip of the first optical fiber is greater than the incident angle at which total reflection occurs on the transparent plate to be detected.
An optical fiber.