SU1251970A1 - Optical sorting device - Google Patents

Description

2. The device according to claim 1, about tl and the fact that, in order to increase the efficiency of the use of light energy, mirrors are fixed diametrically opposite to the slits on the inner surface of the modulator to concentrate on the slit of the light flux.

3. The device according to any one of the following: In order to improve operating reliability, the modulator is equipped with cooling means. The invention relates to the technique of optical sorting of materials and can be used in the woodworking and pulp and paper industry for chip cleaning. from bark, rot and particles of ungrafted wood.

The purpose of the invention is to improve the quality of sorting and reduce energy consumption for the process due to the effective use of the energy of the light flux.

The drawing shows an optical sorting device, a common

view,

The sorting device consists of a conveyor 1, made of parallel-arranged in the horizontal plane ribbons 2, covering the shafts 3, a source 4 of light located inside the modulator 5, having the shape of a cylinder with slots 6 on the side surface, by means of which the source 4 of light st zan with lighting fibers 7, the input ends of which 8 are placed outside the modulator 5, and the output ends 9 are located on both sides of the conveyor 1. At the output ends 9 of the light guides 7, photoreceivers 10 are mounted in pairs on opposite sides in the direction of movement of the conveyor 1, the photodetectors IO and the output ends 9 of the lighting fibers 7 being mounted between the belts 2 of the conveyor 1 perpendicular to its surface.

nor its internal cavity, made in the form of blades mounted on the end of the cylinder.

4. The device according to claim 1, characterized in that the output ends of the light guides and photodetectors located under the conveyor belts are provided with air cleaning soats directed in the direction opposite to the conveyor movement.

The photodetectors 10 are connected via an electronic unit 11 to the actuator 12 with nozzles 13. In the internal cavity of the modulator 5, mirrors 14 are diametrically opposed to 6 to concentrate the light flux from the light source 4 on the slot 6. Blades are mounted on the cylinder end face of the modulator 5 15 for cooling the internal cavity of the modulator 5. The output ends of the optical fibers 7 and the photodetectors 10 located under the leites 2 of the conveyor 1 are equipped with air cleaning nozzles 16 directed in the direction opposite to the moving th conveyor. The modulator is provided with a drive 17 for its rotation.

The device works as follows.

The luminous flux emitted by the light source 4 is concentrated by mirrors 14 on the slot 6 of the modulator 5, which is rotated by the drive 17, and illuminates successively located input ends 8 of the lighting light guides 7. Light rays from the output ends 9 of the lighting light guides 7 located between the strips 2 Transporter I, below and above, illuminate the controlled area with beams normally directed to a horizontal plane, illuminating the control object 18. The light reflected from the object 18 of the control falls on the corresponding photodetectors 10, which convert light signals into electrical and

3

send them to the electronic unit, and where the received signals, depending on their characteristics, are converted into a current pulse, directed to the actuator 12, operating in accordance with the received pulse.

When passing through a controlled area of particles of chips, the reflectivity of which at least on one side does not correspond to the established sample, the electronic unit II sends a corresponding current pulse to the executive fur

base 12

 when it is triggered, non-conforming particles are removed from the conveyor 1 by air jets, exhausted from nozzles 13 located between the belts 2 of conveyor 1. The power of the air jets flowing from nozzles 13 ensures the removal of all particles, regardless of their size and position controlled area. The maintenance of the thermal mode in the internal cavity of the modulator 5 is ensured by forcing the blades 16 of cooling air into it.

Claims (3)

1. OPTICAL SORTING DEVICE, including a conveyor, a light source, illuminating optical fibers optically connected to it by means of a modulator, output ends of which are placed on both sides of the conveyor, photodetectors and an actuator connected to them via an electronic unit, characterized in that, with In order to improve the quality of sorting and reduce energy consumption, the conveyor is made of parallel tapes located in a horizontal plane, the modulator has the shape of a cylinder with slots on the side surface, inside in the morning of which the light source is located, and the input ends of the light guides are placed outside, photodetectors are mounted in pairs at the output ends of the light guides on the sides opposite in the direction of the conveyor movement, the photodetectors and the output ends of the light guides installed between the conveyor belts perpendicular to its surface. g 125) 970 of its internal cavity, made in the form of blades mounted on the end of the cylinder. 4. The device according to π.1, characterized in that the output ends of the optical fibers and photodetectors located under the conveyor belts are equipped with air cleaning nozzles directed in the direction opposite to the movement of the conveyor. 2. The device according to claim 1, characterized in that, in order to increase the efficiency of use of light energy, mirrors are mounted diametrically opposite the slots on the inner surface of the modulator for concentrating on the slots of the light flux. 3. The device according to claim 1, wherein the, in order to increase the reliability in operation, the modulator is equipped with a means for cooling