JPH0250417B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rice grain shell crack detection device for detecting split rice grains in rice grains, and in particular, to a rice grain shell crack detection device for supplying raw rice grains to a detection unit. Regarding the grain trough of the device.

[Conventional technology]

Conventionally, in the case of a detection device in which rice grains arranged in a line are rapidly supplied to a detection unit at regular intervals and along a fixed path using a quantitative supply means such as a vibrating supply gutter, an inclined flowing down stream is used. A gutter (flowing grain gutter) is frequently used to detect rice grains falling through a space extending from the lower end of the gutter (see Utility Model Publication No. 56-31887, etc.).

[Problem to be solved by the invention]

By the way, as mentioned above, there is no problem if the detection unit is provided below the downflow gutter and the entire rice grain flowing out from the lower end of the downflow gutter is irradiated at the same time and the amount of light is detected, but when detecting split grains, there is no problem. In order to sequentially (continuously) illuminate some of the grains of rice grains, a slit-like thin window for light transmission is bored in the downflow gutter (Japanese Patent Application Laid-Open No. 1983-1999).
-51788). In this case, the amount of light from the light source is reduced due to dust and broken grains mixed in the rice grains, especially rice bran on the surface in the case of brown rice or white rice, adhering to or getting stuck in the thin translucent window. As a result, the detection accuracy deteriorates, and furthermore, if this light-transmitting thin window becomes clogged, there is a problem that detection becomes impossible at all.

This invention aims to solve this problem,
It is a technical problem to provide a grain flow gutter for a rice grain shell crack detection device in which dust and the like do not get trapped in the light-transmitting thin window.

[Means to solve the problem]

The grain flow gutter of the rice grain shell crack detecting device according to the present invention for solving the above problem will be explained in accordance with an embodiment. 5 is provided with a light transmitting thin window 6 for irradiating light from a fixed position below onto a part of the rice grain particles flowing down along this, and a light source is provided below the light transmitting thin window 6. 7, and the light-receiving parts of light-receiving elements 8A and 8B are faced diagonally forward and backward in the direction of the flow of rice grains flowing down through the upper part of the light-transmitting thin window 6. The grain flow gutter 5 includes a light transmitting material 4a that defines a grain flow groove 4 that serves as a flow path for rice grains, and a light transmitting material 4.
The support member 5a supports the support member 5a.

(b) An opaque material 15 is superimposed and provided on the surface of the light-transmissive material 4a opposite to the surface defining the grain grooves.

(c) The thin light-transmitting window 6 is formed in this non-light-transmitting material 15.

This technical measure was taken.

[Action and effect]

The raw rice grains inputted into the rice grain supply hopper 13 are conveyed one by one to the flow grain gutter 5, and are transferred to the flow grain groove 4.
When the light from the light source 7 provided at a fixed position flows through the thin transparent window 6 formed in a part of the opaque material 4a, After that, parts of the rice grains are sequentially and continuously irradiated. The light-receiving elements 8A and 8B provided on the opposite side of the light source 7 with the thin light-transmitting window 6 in between continuously detect the amount of transmitted light from different parts of the rice grain, and detect the unique transmission due to the internal cracks of the rice grain. If there is a change in light intensity, it is regarded as a cracked grain and counted.

In this way, the non-transparent material 15 is superimposed and provided on the surface of the light-transmitting material 4a that defines the grain-flowing groove 4 of the grain-flowing gutter 5, which is opposite to the surface that defines the grain-flowing groove 4. A thin light-transmitting window 6 is formed in a part of the rice grain groove, and there are no holes or steps in the grain groove 4, so there is no dust adhesion or dust clogging, and the rice grains can always be irradiated with the same amount of light.
Detection accuracy does not decrease.

[Embodiments of the invention]

A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Cabinet 1
A vibrating inclined grain feeding trough 1 is provided with a rice grain supply hopper 13 at the upper part thereof, and is located close to the lower end of the supply hopper 13 and is gently inclined with the grain discharging port 12 on the inclined upper side.
1 is provided, and a vibrating grain feeding gutter 3 is installed horizontally along with this vibrating inclined grain feeding gutter 11. Both the vibrating grain feeding trough 3 and the vibrating inclined grain feeding trough 11 are provided so as to be vibrated by vibrating devices 9, 9, respectively.
Then, the lower end of the rice grain supply hopper 13 faces the inclined lower side of the vibrating inclined grain feeding trough 11, and a guide wall 14 is erected for guiding the rice grains flowing out from the rice grain supply hopper 13 to the grain discharging port 12, The supply port 10 of the grain feeding groove 2 formed in the vibrating grain feeding gutter 3 and the grain discharging port 12 of the vibrating inclined grain feeding gutter 11 are connected.

Furthermore, the gutter starting end of the grain flow gutter 5 is provided connected to the gutter terminal end of the vibrating grain feeding gutter 3. The grain feeding gutter 5 is provided at an angle that allows rice grains to flow down naturally, and the grain feeding groove 4 defined in the grain feeding gutter 5 and the grain feeding groove 2 of the vibrating grain feeding gutter 3 are provided on a straight line. .

The grain flow gutter 5 includes a light transmitting material 4a having a U-shaped or V-shaped cross section that defines the grain flow groove 4 that serves as a flow path for rice grains, a back side of the light transmitting material 4a, That is, a non-transparent material 15 is provided by overlapping on the surface opposite to the surface defining the grain groove 4, and a light-transparent material 15 that holds the light-transmissive material 4a and the non-transparent material 15, and the grain gutter 5. The opaque material 15 is provided with a slit-shaped transparent portion to form a thin light-transmitting window 6 (see FIG. 3). As is conventionally known, the light-transmitting thin window 6 has a width of 0.5 to 1 mm in the flowing direction of the rice grains, and a width of about 3 mm, which is larger than the width of the rice grains in the direction perpendicular to the flowing direction, that continuously extends a part of the rice grains. Suitable for direct irradiation.

A light source 7 is arranged at a predetermined position below the light-transmitting thin window 6 via an optical system, and above the light-transmitting narrow window 6, a pair of light receiving elements 8A and 8B are connected via the optical system. will be established. That is, the light-receiving parts at the tips of the pair of optical fibers connected to both light-receiving elements 8A and 8B are used to detect the amount of light at both ends in the long axis direction of the rice grains passing through the light-transmitting thin window 6. It is shifted in the direction of the groove 4, that is, in the direction of the flow of rice grains, and is opposed to the light-transmitting thin window 6 from diagonally from the front and rear. Further, the light receiving elements 8A and 8B are connected to a counter circuit (not shown) for the total number of rice grains and the number of split rice grains through various amplifiers, comparators, etc.

Next, specific operations in the above embodiment will be explained. Approximately 1000 rice grains in the form of paddy or brown rice fed into the rice grain supply hopper 13 flow out from the lower end of the supply hopper 13 due to the vibration of the vibrating inclined grain feeding trough 11, and are guided to the guide wall 14 from the lower side of the slope. Gradually, the grains are fed upward to the higher side of the slope and transferred one by one from the grain discharging port 12 into the grain feeding groove 2 of the vibrating grain feeding trough 3. The rice grains that are conveyed in the grain feeding groove 2 in a single row in the longitudinal direction are sequentially transported from the gutter end to
The grain flows out into the grain feeding groove 4 of the grain flow gutter 5, and the long axis is moved at a constant interval through the grain flow groove 4 of the grain flow gutter 5, which has a higher conveying speed than the vibrating grain feeding gutter 3. glide in the direction

The rice grains flowing in the grain groove 4 pass through the narrow window 6 for light transmission.
When reaching the upper part, the light receiving element 8A receives light from the light source 7 that passes through the light-transmitting thin window 6, and the light receiving element 8A receives the amount of light on the front side in the traveling direction of the rice grain through one optical fiber. 8B receives the amount of light from the rear side of the rice grain through the other optical fiber. If the amount of light received by both light-receiving elements 8A and 8B is almost the same, it is considered to be a normal grain, and if the difference is greater than a certain amount (threshold value), it is counted as a grain with a shell crack, and the grain with a shell crack compared to the total number of grains. Display the ratio on the display.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a rice grain shell crack detection apparatus according to the present invention, FIG. 2 is a partial plan view of FIG. 1, and FIG. 3 is a sectional view taken along line A--A in FIG. 1. 1... Cabinet, 2... Grain feeding groove, 3...
... Vibrating grain feeding gutter, 4... Grain flow groove, 4a... Light transmitting material, 5... Grain flow gutter, 5a... Supporting member, 6...
Translucent thin window, 7... Light source, 8A, 8B... Light receiving element, 9... Vibration device, 10... Supply port, 11...
Vibrating inclined grain feeding trough, 12... Grain removal port, 13... Rice grain supply hopper, 14... Guide wall, 15... Non-transparent material.

Claims (1)

[Scope of Claims] 1. A grain flow gutter 5 is installed at an angle on the downstream side of the rice grain supply hopper 13, and a part of the rice grain particles flowing down along the grain flow gutter 5 is irradiated with light from a fixed position below. At the same time, a light source 7 is provided below the thin window 6 for light transmission, and above the thin window 6 for light transmission, a light source 7 is provided. This is a rice grain body cracking detection device in which the light receiving parts of the light receiving elements 8A and 8B face forward and backward, and the grain flow gutter 5 is a light transmitting groove that defines the grain flow groove 4 that serves as a flow path for rice grains. It is composed of a light-transmitting material 4a and a support member 5a that supports the light-transmitting material 4a, and an opaque material 15 is superimposed and provided on the surface of the light-transmitting material 4a opposite to the surface that defines the grain grooves 4. In addition, a grain flow gutter for a rice grain shell crack detection device characterized in that the light-transmitting thin window 6 is formed in the non-light-transmitting material 15.