JPS5945344B2 - Damaged seaweed detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection device for damaged seaweed, in which a seaweed detection circuit consisting of a light emitting element and a light receiving element arranged in parallel on a seaweed transport path is installed at a position corresponding to both ends of the seaweed to be inspected. By making it possible to independently open and close the seaweed detection circuit made up of a light-emitting element and a light-receiving element, the seaweed can be inspected in accordance with the width of the seaweed to be inspected.

Dried seaweed produced by a dry seaweed manufacturing machine contains a considerable amount of defective seaweed with damages such as tears and holes, and it is necessary to separate defective seaweed from normal seaweed.

For this reason, various seaweed inspection devices have been proposed that are equipped with a seaweed detection circuit consisting of a light-emitting element and a light-receiving element, but conventional devices of this type can only inspect a predetermined width of seaweed.

In other words, this type of device 11 consists of a detection circuit consisting of a large number of light-emitting elements and light-receiving elements arranged in a direction intersecting the seaweed transport conveyor, and detects whether or not the light-receiving element is blocked by the seaweed, and detects whether or not the light-receiving element is blocked by the seaweed. However, in the case of small-width seaweed, even if the seaweed to be inspected is normal seaweed with no tears or holes, the light-receiving elements at both ends will receive light, so the seaweed may be torn. It had the disadvantage that it was judged to be defective seaweed because it had holes in it.

Therefore, the present invention was made for the purpose of providing a damaged seaweed detection device that eliminates the drawbacks of such conventional devices,
A seaweed detection circuit consisting of a light emitting element and a light receiving element disposed at positions corresponding to both ends of the seaweed to be inspected on the seaweed transport conveyor is provided with an independent switch device, and thus Therefore, the seaweed detection circuits at both ends can be opened and closed depending on the size of the seaweed.

Hereinafter, the present invention will be explained in detail along with the drawings.

1 and 2 are a front view and a side view of the damaged seaweed detection device, in which 1 is a conveyor for transporting seaweed, and substrates 21 and 2□ are provided above and below the conveyor.

Lower board 2. There are 36 infrared light-emitting diodes on the upper substrate 2, and phototransistors facing each light-emitting diode are arranged in parallel in the direction intersecting the seaweed conveyor 1. It is designed to detect the seaweed to be inspected.

a and a' are infrared light emitting diodes, b and b' are phototransistors facing each light emitting diode a and a', and when the first phototransistor b detects the seaweed m, it detects a hole in the seaweed. The detection is started and ends when the second phototransistor b' detects the seaweed m.

FIG. 3 shows a seaweed detection circuit consisting of the above-mentioned phototransistors and light emitting diodes, in which P1 to PSA are the above-mentioned phototransistors, and each of the phototransistors P1 to
P36 are connected to operational amplifiers A1 to A36, respectively.

For convenience of drawing, phototransistor PIO""'-P2
□ and the operational amplifier A 1 o"" connected to these
'-A27 is omitted.

These phototransistors P1 to P36 detect the vicinity of the edge of seaweed (hereinafter referred to as A block).
P6 and P31-P36. :! :, those that detect the vicinity of the center of seaweed (hereinafter referred to as B block) P7 to pao
The phototransistor P of the A block is divided into
The detection signals of 1 to P6 and P31 to psa are transmitted from operational amplifiers A1 to A6 and A31 to A36, respectively, to NOT circuit C1 via NAND circuits B1 to B6 and B31 to B35, and are inverted so as to reach rotary switch R8. It has become.

In addition, the phototransistors P7-P3° of the B block are connected to the operational amplifiers A7-A3o1, NAND circuits B7-B3o, NAND circuits B7-B3o,
OROR circuits -1 to D24 are connected to rotary switch R8 via OT circuits 02 to C26.

Note that the NANR circuit BIO""-B27, NOROR circuit-4 to D21, and OT circuits C6 to C23 are also omitted for convenience of drawing.

Sl and B2 are phototransistors P1 and p3 arranged at positions corresponding to both ends of the seaweed m to be inspected on the conveyor 1.
A switch device is provided independently in the seaweed detection circuit consisting of a, and when the seaweed width is large, the switch S1.
B2 is turned on to close the detection circuit, and when the seaweed width is small, it is turned off and each phototransistor P1. The seaweed detection circuit consisting of P36 is opened.

Rotary switch R8 has three movable contacts a.

There are terminals b and c, which are selectively connected to terminals 10, 21, 31 and 1□, 2□, 32 and 13, 23, 33, respectively, so that output signals are outputted from output terminal 4 as appropriate.

Note that the terminals 31, 12, and 2□ are open terminals as shown in the figure, and the movable contacts a and b of the rotary switch R8
Even if they touch, no current will flow.

This device is configured as described above, and its operation will be explained next.

First, operate rotary switch R8 to connect contacts a, b,
Align c with each terminal 10, 1□, 13.

In this case, the inspection level is the highest, and if any one of the phototransistors P1 to PSA receives light, the terminal 4
A detection signal is emitted from the

That is, if the seaweed m has a hole or the like and the phototransistor P7 receives light, the light reception signal reaches the operational amplifier A7, the NOT circuit C2, and the rotary switch R8, and a detection signal is generated from the terminal 4.

Next, operate rotary switch R8 to close each contact a ””
-c to each terminal 2□s 22 t 23.

In this case, in A block, if any one phototransistor receives light, a detection signal is emitted from terminal 4, but B
In the block, a detection signal is emitted from the terminal 4 only when at least two adjacent phototransistors receive light.

That is, in the A block, for example, when the L-transistor P2 receives light, the received light signal is sent to the operational amplifier A2, NO
It reaches T circuit C1 and rotary switch R8, and a detection signal is emitted from terminal 4, but in block B, even if only one transistor receives light, the detection signal is not emitted from output terminal 4. There is.

However, if two phototransistors adjacent to each other receive light, a detection signal is emitted from the terminal 4.

That is, for example, when phototransistors P8 and P9 both receive light, the light reception signal passes through operational amplifier A8*Ag and reaches NAND circuit B8, and the output signal of NAND circuit B8 further passes through rotary switch R8 and a detection signal is issued from terminal 4.

In this way, the detection level of the B block is lower than that of the A block, and even if there is a minute hole in the A block where only one phototransistor receives light, the detection signal is not transmitted from the terminal 4. However, in the B block, when only one phototransistor receives light, a detection signal is not emitted, and only when the hole is large enough that at least two adjacent phototransistors receive light, a detection signal is emitted from terminal 4. No detection signal is emitted.

This is because even if the holes are the same, the holes in block A are more noticeable than those in block B, so the detection novelty of block A is higher.

Next, each contact atbtC of the rotary switch R8 is switched to the terminals 31, 3□, and 33.

In this case, the detection level is the lowest, and in block A, a detection signal is emitted from terminal 4 only when at least two phototransistors adjacent to each other receive light, and in block B, at least three phototransistors adjacent to each other receive a detection signal. A detection signal is generated from the terminal 4 only when the phototransistors receive light.

By the way, if the width of the seaweed to be inspected m is small, the phototransistors P36 at both ends of the phototransistors P1 to P36 will always receive light, and the seaweed will be normal seaweed without tears or holes. Nori seaweed is also judged to be defective.

Therefore, when inspecting seaweed with a small width, the switch device S1. If S2 is turned off and the seaweed detection circuits at both ends are opened, the light receiving element P1. Even if P2 receives light, the seaweed detection circuit is not driven.

Note that each switch device S1. If S2 is an interlocking type, it is only necessary to turn one side on and off, making handling easier.

As explained above, the apparatus according to the present invention includes an independent switch device in the seaweed detection circuit consisting of a light emitting element and a light receiving element disposed at positions corresponding to both ends of the seaweed to be inspected on the seaweed transport conveyor. Therefore, damaged seaweed can be detected without any problem depending on the width of the seaweed to be inspected.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a detection circuit diagram. 1... Seaweed transport conveyor, m... Seaweed to be inspected, P1 to P36... Phototransistor,
SL, S2...Switch device.

Claims (1)

[Claims] 1 Above and below the seaweed conveyor, a large number of light-emitting elements and light-receiving elements constituting the seaweed detection circuit are arranged in parallel in the direction intersecting the seaweed conveyor, facing each other, By providing an independent switch device in the seaweed detection circuit consisting of a light emitting element and a light receiving element arranged at positions corresponding to both ends of the seaweed to be inspected, these seaweed can be detected according to the width of the seaweed to be inspected. Damaged seaweed detection device that can open and close the circuit.