JPH07104208B2 - Particle sorter by color - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color particle sorter that sorts grains such as grains by color difference.

2. Description of the Related Art Conventionally, a particle sorter using this type of color causes different-color mixed particles to flow down from a downflow gutter, and a reference color plate, an injection nozzle device, and a light source are provided near the downflow path, and along the downflow path. The light receiving element detects the amount of reflected light obtained by irradiating the flowing particles from the light source and the amount of light from the reference color plate.The detection circuit is processed by the control circuit, and when a predetermined change in the amount of light is detected, the injection nozzle It is provided with a configuration for operating the device and selecting particles of different colors.

A device for selecting particles with such a color is known.

By the way, in order to match the reference color plate to the color of the particles based on the raw material particles to be color-selected, the reference color plate that is divided into several dozen types is replaced each time, or the reference color plate is used as a transmissive body and its rear surface is used. It is necessary to adjust the reference color by the reference color plate by providing a lamp on the substrate and increasing or decreasing the light amount of the lamp.

However, it is troublesome to replace the standard color plate for each different raw material particle, and it takes time to select the standard color plate, and its storage is troublesome. In addition, in the case of adjusting the light intensity of the reference light from the reference color plate by increasing or decreasing the light intensity of the lamp, there are some that cannot be adjusted to the required reference color depending on the raw material particles, so that the sorting performance of all granular materials is perfect. There are aspects that cannot be satisfied.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention can easily select a reference color for almost any granular material in a short time, and adjustment for that is easy, and particles with different colors having high detection accuracy of different-color particles The task is to provide a sorting machine.

Means for Solving the Problem The present invention relates to a color particle sorter having a different-color particle detection device and a different-color particle removal device.

In the different-color particle detection device, the reference color device and the light receiving device are arranged to face each other across the sub-particle locus of the particle, and the particles are generated by passing through the front of the reference color plate provided in the reference color device while being irradiated from the light source. A change in the light received from the reference color plate is detected by the light receiving device to detect particles of different colors.

The reference color device includes a spectroscopic light emitting unit that emits two types of light rays classified by wavelength and is combined with the reference color plate, and a light amount adjusting unit that adjusts the light amount of each of the light beams.

The light receiving device includes a spectroscopic light receiving unit that separates the two types of light beams, and a detection unit that detects changes in each of the separated light beams.

It is preferable to have the following specific configuration.

The spectroscopic projection means includes a dichroic mirror, and the passing light and the reflected light from the light source by the mirror are made into two kinds of light rays divided by the above wavelength.

With respect to the dichroic mirror, light sources for reference colors that generate the passing light rays and the reflected light rays are separately arranged, and each light source is provided with a light amount adjusting means.

A short-wavelength or long-wavelength range filter matching the characteristics of the passing light and the characteristics of the reflected light of the dichroic mirror must be attached to the light source for the reference color on the side to be the passing light and the light source for the reference color on the side to be the reflected light. .

The spectral light receiving means includes a filter and a dichroic mirror, and the dichroic mirror splits the received light into a passing light ray and a reflected light ray, and passes them through a filter to obtain two kinds of light rays that have been split.

The different-color particle detection device detects different-color particles that do not match the reference color from the particles that fall down the flow path.

The different-color particle removing device removes different-color particles that do not match the reference color from the particles that fall down the sub-particle locus.

The reference color device provides a reference color, which is a reference for selecting particles by color, as a background color of particles that fall down a downward trajectory.

The light receiving device receives as a received light a reference color including reflected light from a particle which is irradiated from a light source and moves on a downward trajectory, and detects the amount of the light.

The spectroscopic light emitting means forms a reference color by combining two kinds of light rays classified by wavelength with a reference color plate.

The light amount adjusting means adjusts / determines the color of the reference color.

The spectral light receiving means splits the received light into two types of light rays and directs them to the respective detecting means.

The detection means receives the split received light and detects the light amount.

Example FIG. 1 is a color grain sorter, which is an example of implementing the present invention.

In FIG. 1, a downflow gutter 2 is inserted into a machine barrel 1,
A different-colored particle detecting device 3 and a different-colored particle removing device including an injection nozzle 16 are arranged in the lower half of the machine barrel 1, and grain-feeding devices 4 are arranged at the upper ends, respectively, and the whole is integrated as a sorting machine. Is configured.

In the grain feeder 4, the upper half of the box frame 5 is formed in the supply hopper 6, and a vibrating grain trough 8 having a vibrating unit 7 is provided below the feeding hopper 6.

The different-color particle detection device 3 includes a light source 9, a reference color device 14, and a light-receiving device 15 arranged around the flow path A of the grain bundle flowing out of the flow gutter 2, and includes a control circuit 19 described later.

The above-mentioned different color particle removing device is installed at the lower end of the machine nozzle 1 and the injection nozzle 16 arranged in the machine cylinder 1 below the light receiving device 15, the grain collecting cylinder 17 fixed on the extension line of the downward trajectory A, and the machine cylinder 1. It is provided with a different-colored grain discharge port 18 and includes a control circuit 19 described later.

The injection nozzle 16 is located below the light receiving device 15, and after the light receiving device 15 detects the different color particles to be removed, the injection nozzle 16
The 16s are placed at a distance (experimentally obtained) that takes into consideration the time lag until the 16 actually operates and the falling speed of the grain.

A machine casing 20 is attached to the side of the machine casing 1, and inside the machine casing 20 is a selection reference value (setting value) for different color particles and lamps 12A, 12B.
A control circuit 19 having a circuit for controlling the amount of light (light amount adjusting means) is arranged.

Reference numeral 21 is a column.

The reference color device 14 (FIG. 2) is provided with a reference color plate 11 made of a plate that transmits light inside one end of the T-shaped housing 22.
In addition, the light source for the reference color is provided at the other end of the housing 22 at two positions
As 12, a red lamp 12A and a green lamp 12B are fitted and inserted.

A long wavelength filter 23 is provided in all of the red lamps 12A,
A filter 24 in the short wavelength range is attached to the front of the green lamp 12B. These filters 23, 24 are selected in accordance with the transmitted light ray characteristic and the reflected light ray characteristic of the dichroic mirror 13A.

The lamp 12 (A, B) as the light source for the reference color and the reference color plate 1
The dichroic mirror 13A is disposed between the dichroic mirror 13 and the dichroic mirror 1, and light (spectral light) from the lamp 12 (A, B) is emitted to the reference color plate 11 together.

A light receiving device 15 is provided on the opposite side of the reference color device 14 that faces the downflow locus A of the particles that flow down from the downflow gutter 2. In the light-receiving device 15, a condenser lens 26 is inserted into one end of a T-shaped light-receiving housing 25, and a long-wavelength filter 27 and a slit ring 28 are provided on one end of the other side of the housing 26. Is mounted on the front surface, and the other end of the same end is equipped with a short wavelength band filter 29 and a light receiving element 10B with a slit ring 30 arranged on the front surface.

Then, the dichroic mirror 13B is arranged between the condenser lens 26 and the light receiving element 10, and the light rays incident from the condenser lens 26 are dispersed and received by the respective light receiving elements 10 (A, B). ing.

The light sources 9 and 9 are halogen lamps and have a light amount sufficient to irradiate the grains falling on the downward trajectory A.

Light intensity adjusting dials 31, 32 are provided corresponding to the respective standard color lamps 12 (A, B). These include a control circuit 19 to constitute a light amount adjusting means, and by turning a dial, the light amounts of the reference color lamps 12 (A, B) can be individually adjusted.

The operation will be described below.

Particles of different color mixed with the raw material (for example, brown rice) flowing down from the supply hopper 6 to the vibrating grain trough 8 flow down to the lower flowing down gutter 2 by vibrating action of the vibrating device 7. Then, the mixed particles flow down the gutter surface and flow down in the different-color particle detecting device 3 along the locus A.
Run down along. In the different-color grain detecting device 3, the grains falling on the trail A are illuminated by the light sources 9, 9.

At the same time, in the reference color device 14, the light beam from the red lamp 12A passes through the dichroic mirror 13A and passes through the reference color plate 1.
1, and the light beam from the green lamp 12B is reflected by the dichroic mirror 13A and emitted to the reference color plate 11.

These two types of light rays emitted and divided by wavelength are combined on the surface of the reference color plate 11 to form a reference color surface having a uniform color and light amount.

The color and light intensity of the standard color surface are adjusted by increasing or decreasing the light intensity (spectral light intensity) of the lamp 12 (A, B) as the light source for the standard color by adjusting the dials 31, 32 to adjust to the standard grain color of brown rice. To be done.

In the above description, the lamp 12 (A, B), the filters 23, 24, and the dichroic mirror 13A constitute a spectral projection means for combining two kinds of light rays, which are divided according to wavelength, with the reference color plate 11.

In this embodiment, the light rays of the lamp 12 (A, B) as the light source for the reference color are erased by the filters 23 and 24, respectively. The dichroic mirror 13A has a characteristic of transmitting a long wavelength region of 590 nm or more and reflecting a short wavelength region of less than this wavelength.

Reflected light from particles falling while being illuminated by the light sources 9 and 9 on the downward trajectory A and reference color light from the reference color plate 11 are detected by the light receiving element 10 as received light. In this case, the condenser lens
Rays incident through 26 are dichroic mirror 13
It is split into light rays in the long wavelength range (passing rays) and light rays in the short wavelength range (reflected rays) by B. Then, after the unnecessary wavelength light is eliminated by the long wavelength filter 27, it is received by the light receiving element 10A, and the short wavelength light is received after the unnecessary wavelength light is eliminated by the filter 29. The light is received by the element 10B. That is, the dichroic mirror 13B and the filters 27 and 29 are spectral light receiving means.

In this action, if the amount of light received by the light receiving element 10 (A, B) is different from the reference value (set value) predetermined for the light receiving element 10A and the light receiving element 10B in the control circuit 19, the ejection nozzle 16 will The particles of different colors are operated and separated from the downward trajectory A by the action of the air blow of the nozzle. The separated different-color particles are discharged from the different-color particle discharge port 18 to the outside of the machine.

The filters 23, 24, 27 and 29 are appropriately selected according to the color of the particles to be selected. The same applies when light of a specific wavelength is emitted as the light source for the reference color.

However, if a dichroic mirror is used for the spectral light emitting means and the spectral light receiving means, there is an advantage that the light beam splitting or the spectral mechanism can be simply configured.

When the number of light sources for the reference color is two, the amount of light can be adjusted for each, so that the adjustment of the reference color can be performed easily and widely.

If filters are used for the reference color device 14 and the light receiving device 15, there is an advantage that the adjustment of the reference color and the spectrum of the received light can be sharply performed, and thereby the sorting accuracy is improved.

EFFECTS OF THE INVENTION The reference color provided by the reference color plate can be adjusted appropriately according to the raw material particles to be selected, and can be adjusted by a simple operation such as operating a dial.

It is possible to delicately adjust the intensity of one of the two types of light rays divided by the wavelength by the spectral emission means, or to arbitrarily select the wavelengths of the two types of light rays according to the color of the particles to be selected. By the spectral light receiving means that uses the two types of wavelength bands as the received light, it is possible to accurately detect the change in the light amount caused by the different color particles, thereby stabilizing the selection efficiency of the different color particles,
Moreover, the sorting accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a color particle sorter. FIG. 2 is an enlarged cross-sectional view of the different color particle detection device. FIG. 3 is a graph showing the wavelength characteristic of the dichroic mirror. FIG. 4 is a graph showing wavelength characteristics of light after passing through the filter. 1 ... Machine barrel, 2 ... Downflow gutter, 3 ... Different color particle detector, 4
…… Grain feeder, 5 …… Box frame, 6 …… Supply hopper, 7…
… Vibration device, 8 …… Vibration grainer, 9 …… Light source, 10 …… Light receiving element, 11 …… Reference color plate, 12 (A, B) …… Lamp, 13
(A, B) …… dichroic mirror, 14 …… standard color device, 15 …… light receiving device, 16 …… injection nozzle device, 17 …… grain collecting cylinder, 18 …… different color particle discharge port, 19 …… control circuit , 20 …… Machine frame, 21 …… Support, 22 …… T-shaped housing, 23, 24 ……
Filter, 25 …… Receiving housing, 26 …… Condenser lens, 27,29 …… Filter, 28,30 …… Slit ring,
31,32 …… Dial.

Claims (5)

[Claims] 1. A reference color device and a light receiving device are arranged opposite to each other with a particle flow path interposed therebetween, and the particle and the reference color are obtained by passing the particle in front of a reference color plate provided in the reference color device while being irradiated from a light source. It has a different-color particle detecting device and a different-color particle removing device for detecting a different-color particle by detecting a change in the light received from the plate with a light-receiving device, and the reference color device emits two kinds of light rays classified by wavelengths to be a reference. A spectroscopic light emitting means combined with the color plate and a light quantity adjusting means for adjusting the quantity of light of each of the spectrums are provided, and the light receiving device separates the two kinds of light rays into a spectral light receiving means and a detecting means to detect respective changes of the separated light rays A color particle sorter characterized by having and. 2. The spectroscopic light emitting means comprises a dichroic mirror, wherein the passing light and the reflected light from the light source are two kinds of light rays divided by the wavelength. A particle sorter according to the item 1. 3. A dichroic mirror, characterized in that light sources for reference colors for generating the passing light rays and the reflected light rays are separately arranged, and a light amount adjusting means is provided for each light source. A particle sorter according to the second aspect of the present invention. 4. A light source for a reference color on the side to be a passing light ray and a light source for a reference color on the side to be a reflected light ray of a short wavelength range or a long wavelength range according to the characteristics of a passing light ray and a reflected light ray of a dichroic mirror. The color particle sorter according to claim 3, further comprising a filter. 5. The spectral light receiving means comprises a filter and a dichroic mirror, and the dichroic mirror splits the received light into a passing light ray and a reflected light ray, and passes these light rays through respective filters to obtain two types of light rays that are split into light rays. A particle color sorter according to any one of claims 1 to 4, characterized in that: