KR100241296B1 - Search device of play machine bead - Google Patents

Abstract

[purpose]

It is difficult to be affected by noise and improves the adaptability of the organic beads to the path shape.

[Configuration]

In the cover 10 made of transparent acrylic, grooves 11 through which organic beads can pass are formed, and on the substrate 20 covered by the cover 10, the light emitting diodes 21 facing each other with the grooves 11 interposed therebetween. ) And a photo transistor 22 are disposed. The light emitting diode 21 and the photo transistor 22 are connected to a detection circuit on the substrate 20. When the organic beads block both, the waveform shaping circuit 26 according to the change in the output signal of the photo transistor 22. ), A rectangular output signal is obtained.

Description

Organic Bead Detection Device

1 is a perspective view of an organic bead detecting device according to Embodiment 1 of the present invention.

2 is a schematic cross-sectional view of an organic bead detecting device.

3 is a circuit diagram of an electronic circuit including a detection circuit.

4 is a diagram showing an input signal of a waveform shaping circuit.

5 is a diagram showing an output signal of a monostable multivibrator.

6 is a schematic view showing a modification of the organic bead passage.

7 is a schematic view showing a modification of the organic bead passage.

* Explanation of symbols for main parts of the drawings

10: cover 11: groove

12: screw hole 20: substrate

21 light emitting diode (light emitting element) 21a, 22a: lead wire

22: phototransistor (light receiving element) 23a, 23b: power input terminal

24, 25, 27: resistance 26: waveform shaping circuit

28: output terminal

The present invention relates to an organic bead detecting device for detecting the presence or absence of organic beads passing through a predetermined passage in an organic zone.

BACKGROUND ART Conventionally, an organic bead detecting device of this kind has a photo interrupter having a light emitting element and a light receiving element facing each other, and a mold formed in a “c” shape, and connected to the photo interrupter to emit a light emitting element, It is known to have a detection circuit for inputting an output signal of and detecting a light incident state and a light shielding state for a light receiving element based on the output signal.

In such a configuration, the hole of the photo interrupter is arranged in the passage of the organic beads, and connected to the detection circuit arranged at another place by a signal line. When there is no organic bead, the outgoing light of the light emitting element is incident on the light receiving element, and the detection circuit determines that there is no organic bead based on the output signal outputted by the light receiving element when it is received. However, if the organic beads pass through the “c” shaped hole in the photo interrupter while passing through the passage, the organic beads block the outgoing light of the light emitting element, so that the detection circuit does not enter the light receiving element. It is determined that organic beads exist based on the output signal outputted by the light receiving element at the time of light shielding.

In the above-described conventional organic bead detection device, since the photo interrupter and the detection circuit are separately arranged, there is a problem that noise may be detected in the signal line connecting both.

In addition, the passage of the organic beads has a bent portion, and there is a problem that it is difficult to arrange the photo interrupter depending on the shape of the passage.

This invention is made | formed in view of the said subject, Comprising: It aims at providing the organic bead detection apparatus which is hard to be influenced by noise, and can improve the adaptability to the path shape of organic beads.

In order to achieve the above object, the invention of the present application, a cover for forming a predetermined passage by forming a groove that can pass through the organic beads with the light shielding on both side walls, a substrate covered with the cover, and the groove between A light emitting element and a light receiving element disposed on the substrate so as to face each other, and a detection circuit which emits the light emitting element and detects organic beads passing through the groove based on an output signal of the light receiving element. to be.

In the invention of the present application configured as described above, the cover is provided with a groove through which organic beads can be passed, and the organic bead detection device is placed in the organic zone with the groove aligned with the passage of the organic beads in the organic zone. Then, the organic beads rolling off the passageway pass through the grooves of the cover. Since the light emitting element and the light receiving element are disposed on the substrate covered with the cover so as to face each other with the groove interposed therebetween, the organic beads block the light emitting element and the light receiving element when passing through the groove.

The detection circuit on the substrate emits the light emitting element and inputs the output signal of the light receiving element, and the presence or absence of organic beads on the basis of the change of the output signal of the light receiving element when the organic beads block the outgoing light of the light emitting element. Detect.

As described above, in the present invention, since the light emitting element and the light receiving element are connected to the detection circuit on the same substrate, it is difficult to be influenced by noise, and the cover is formed so as to form the passage of the organic beads. It is possible to provide an organic bead detecting device which can form a cover in accordance with a passage and can be easily disposed.

EXAMPLE

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

1 is a perspective view of an organic bead detecting device according to Embodiment 1 of the present invention.

In this figure, the cover 10 is made of transparent acrylic, and the upper surface is formed with a straight groove 11 through which organic beads can pass. The lower surface of this cover 10 is open, and covers the upper surface of the board | substrate 20 so that screw fixing is possible in the screw hole 12 of four corners.

On the substrate 20, a light emitting diode 21 and a photo transistor 22 facing each other with the groove 11 of the cover 10 interposed therebetween are provided. As shown in FIG. 2, both are soldered and held upright on the substrate 20 with the lead wires 21a and 22a long, respectively, and the light emitting surface of the light emitting diode 21 and the photo transistor 22 on the tip side. ), The light receiving surface is bent to face.

On the substrate 20, as shown in FIG. 3, an electronic circuit including these light emitting diodes 21 and photo transistors 22 is formed. The electronic circuit is provided with power input terminals 23a and 23b, and is connected to a power supply source (not shown).

On the other hand, the photo transistor 22 is connected in parallel with the resistor 24, the resistor 25 is connected in series with this parallel circuit, and the light emitting diode 21 is connected in parallel with the series circuit. . The connection point between the resistor 24 and the resistor 25 is connected to the waveform shaping circuit 26, and the output end of the waveform shaping circuit 26 is the output terminal 28 of the organic bead detecting device. . Here, the waveform shaping circuit 26 outputs a rectangular pulse signal that forms a change in the input signal and continues for a predetermined length of time.

Further, parallel circuits such as the light emitting diode 21 and the photo transistor 22 are connected between the power supply input terminals 23a and 23b. The waveform shaping circuit 26 is also connected to the power input terminals 23a and 23b via a power supply line (not shown). In addition, a resistor 27 is connected to the light emitting diode 21 in series.

Next, the operation of the present embodiment having the above configuration will be described.

The organic bead detecting device is arranged in a portion of the rear side of the organic band that serves as an organic bead passage.

In this case, the standard size makes it easy to remove and attach as one unit. As this passage, for example, passage paths of granular beads correspond. When the organic beads enter the granular hole and roll off in the path, they pass through the grooves 11 formed in the cover 10 of the organic bead detecting device.

By the way, when power is supplied to the light emitting diode 21 through the power input terminals 23a and 23b, the light emitting diode 21 emits light. When this light is incident on the light receiving surface of the phototransistor 22, the resistance value between the collector and the emitter decreases, and the potential of the connection point between the emitter and the resistor 25 of the phototransistor 22 increases. On the other hand, if a light shielding material exists between the light emitting diodes 21 and the photo transistors 22, the outgoing light of the light emitting diodes 21 does not enter the photo transistors 22, and the collector-emitter The resistance increases. For this reason, the potential of the connection point of the emitter of the photo transistor 22 and the resistor 25 falls.

Normally, since no light shielding material exists between the light emitting diodes 21 and the photo transistors 22, the input voltage of the waveform shaping circuit 26 is high, as shown in FIG. However, when the organic beads pass through the grooves 11 and pass between the light emitting diodes 21 and the photo transistors 22 formed on both sides of the grooves 11, the light emitting diodes 21 have a short time. Since the output light is blocked, the amount of light input to the photo transistor 22 decreases, and the input voltage of the waveform shaping circuit 26 decreases as shown in FIG. The waveform shaping circuit 26 outputs to the output terminal 28 a signal of a constant voltage that lasts for a predetermined time as shown in FIG. 5 in accordance with the change of the input voltage.

In this way, since the output signal of the photo transistor 22 is judged as it is by the electronic circuit on a board | substrate, it does not misdetect by a noise. On the other hand, the signal output from the output terminal 28 is a stable signal shaped through the waveform shaping circuit 26, and thus is resistant to noise. Therefore, even if it is wired to the back side of an organic stand, it will not detect incorrectly.

In addition, since the cover 10 is formed transparent, the light emitted from the light emitting diode 21 can sufficiently enter the phototransistor 22 even if the side surface of the groove 11 is somewhat dirty.

In the above-described embodiment, the groove 11 forms a simple straight passage, but as shown in Figs. 6 and 7, a curved passage and a curved passage are formed depending on the organic band. The shape of the passage can be changed freely. On the other hand, standardizing the shape of the cover 10 is convenient in the case of repair or reuse.

In both figures, the light emitting diodes are indicated by white circles, and the photo transistors are indicated by black circles.

In the above-described embodiment, the light emitting diodes and the photo transistors are used, but other light emitting elements and light receiving elements may be used. In this case, the use of infrared light can reduce false detection more.

Claims (1)

A cover 10 for forming a predetermined passage by forming a groove 11 through which organic beads with both side walls are transmissive, a substrate 20 covered with the cover 10, and the groove 11 The light emitting element 21 and the light receiving element 22 disposed on the substrate 20 so as to face each other, and the light emitting element 21 emits light and based on an output signal of the light receiving element 22. And a detection circuit for detecting the organic beads passing through the grooves (11).