JPH0618284Y2 - Grain quality judgment device - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" This invention relates to a grain quality determination device, and in particular, the quality of grain that prevents misjudgment when paddy is mixed in a sample. Regarding a determination device.

"Prior Art" Conventionally, as a quality determination device for grains such as brown rice, there is one disclosed in, for example, JP-A-62-150141. The one disclosed in this publication irradiates each grain of brown rice with light to detect the diffuse transmitted light amount, the diffuse reflected light amount, and the light amount of any two wavelengths in the diffuse reflected light amount, and calculate each light amount ratio to obtain. The ratio of the respective light intensity is compared with the judgment block set by the experimental data in advance, and the quality of the brown rice (for example, sized rice, white-grained rice, milk-white rice, green immature grain, colored grain, blue dead rice, dead white rice) ) Is determined.

"Problems to be solved by the invention" By the way, in this quality judging device, in general, brown rice, which is a measurement sample, is hulled from the state of paddy and supplied to the quality judging device. If it is not performed well and the grain after the hulling is mixed with the grain of the unhulled rice, there is an inconvenience that the quality of the whole sample cannot be measured with high accuracy by misjudging the rice grain as colored particles. It was In order to eliminate this inconvenience, a method in which the operator removes the paddy in the sample after hulling and then supplies it to the quality determination device, but in this method, the working efficiency does not decrease. The purpose is to realize a grain quality determination device capable of preventing erroneous determination when paddy is mixed in a sample.

[Means for Solving the Problem] In order to achieve this object, the present invention provides a transfer device for supplying a sample to each particle and irradiating each sample provided integrally with the transfer device with light. , A diffused transmitted light amount (T) and a diffuse reflected light amount (R), a detection unit for detecting a light amount of two wavelengths (Re, G) of a red light region and a green light region, and a detection value input from this detection unit. Based on the light intensity ratio (T / R, Re /
G), and a determination control unit for individually determining the quality of the sample by comparing this with a determination block preset for each of a plurality of classifications, and the determination control unit, The determination block is provided with a “paddy” block, and the sample determined to be “paddy” is excluded from the measurement target.

[Operation] According to the configuration of the present invention, in the determination block of the determination control unit, the “paddy” block obtained in advance by experiment is set, and when the supplied sample is determined to be the “paddy”,
This sample is not subject to measurement, that is, neither counting as the number of samples nor selection processing is performed, but only counting as paddy is performed. As a result, the quality of the sample can be determined based on brown rice other than paddy.

"Embodiment" Hereinafter, an embodiment of the present invention will be described in detail and specifically with reference to FIGS.

1 and 2 are schematic configuration diagrams showing an embodiment of a grain quality determination device 1 according to the present invention. The quality determination device 1 is composed of a rotating disk 2 and a detection unit 3.

The rotating disc 2 transfers grains as a sample to the detection unit 3 one by one, and has a plurality of sampling holes 4 and timing holes 5 at the outer peripheral edge at equal angles in the circumferential direction, It is rotatably supported in the direction of arrow a by a motor 7 directly connected to the rotary shaft 6. As shown in FIG. 2, the rotating disk 2 is provided with an inclination of an angle θ, and a back surface 9 thereof is provided with a base 9 for preventing the sample 8 which is fitted into the sample collecting hole 4 and is transferred from falling. .

Further, a wall 10 is provided vertically below the base 9 along the outer peripheral edge of the rotating disk 2 along the outer peripheral edge thereof, and a sample is provided between the wall 10 and the lower slope 2-1 of the disk 2. A sample supply unit 11 for storing 8 is provided. The sample 8 stored in the sample supply unit 11 fits into the sample collection hole 4 for each grain as the rotary disc 2 rotates, and is prevented from falling by the base 9 while the arrow a
Is transferred in the direction.

The detection unit 3 includes, for example, a first head 3-1 that detects an amount of transmitted / reflected light and an amount of diffusely reflected light of two wavelengths, and a second head for body split detection that detects an amount of transmitted light in the longitudinal direction of the sample 8. 3-2, and a light beam is radiated for each grain of the transferred sample 8, and the diffuse transmission light amount (T) and the diffuse reflection light amount (R), and the red light region and the green light in the diffuse reflection light amount. The light quantity (Re, G) of the two wavelengths in the area is detected. This detected value is
The sample 8 is input to the determination control unit 12 to be described later,
The data is used to classify into 6 qualities: immature grain, damaged grain, colored grain, dead rice, and paddy.

FIG. 3 is an explanatory diagram showing a connection relationship between the first head 3-1 and the second head 3-2 of the detection unit 3 and the determination control unit 12. This will be described below.

The first head 3-1 irradiates the sample 8 with a light beam by the light emission source 13, the infrared cut filter 14, and the condenser lens 15. The diffuse transmitted light amount (T) and the diffuse reflected light amount (R) of the irradiated light are converted into electric signals by the transmitted light receiving element 16 and the reflected light receiving element 17 which are photodiodes or the like, and the signals are subjected to determination control. It is output to the unit 12.

Further, a part of the diffusely reflected light is condensed by the condensing lens 18, divided by the half mirror 19 in two directions, and then two arbitrary wavelengths are extracted. One of the split lights passes through the red light by the 660 nm band pass filter 20 and the infrared cut filter 21, the red light receiving element 22 converts the light amount into an electric signal, and the electric signal is output to the determination control unit 12.
The other light passes through the 550 nm bandpass filter 23 and the infrared cut filter 24 as green light, and the green light receiving element 25 converts the amount of light into an electric signal.
It is output to the determination control unit 12. These light emitting sources 13
~ The green light receiving element 25 constitutes the first head 3-1.

The second head 3-2 irradiates the sample 8 with a light beam by the light emitting element 26 such as an LED and the illuminating optical fiber 27. The front transmitted light and the rear transmitted light in the long axis direction of the sample 8 of the light beam irradiated on the sample 8 transferred in the direction of the arrow a are
The front transmitted light receiving element 30 is provided by the front transmitted light optical fiber 28 and the rear transmitted light optical fiber 29, respectively.
And is guided to the rear transmitted light receiving element 31. As a result, the front transmitted light amount and the rear transmitted light amount of the irradiated light beam are detected by the front transmitted light receiving element 30 and the rear transmitted light receiving element 31, respectively, and converted into an electric signal, and the determination controller 12 Is output.

Further, the second head 3-2 is provided with a light emitting element 32 which irradiates a light beam toward the timing hole 5 of the rotary disc 2, and detects the light beam when the fixed hole 33 and the timing hole 5 coincide with each other. A light receiving element 34 is provided. This light receiving element 3
The light beam detected by the reference numeral 4 is converted into an electric signal to be waveform-shaped, and then the judgment control section 1 is used as a detection signal of the timing hole 5.
2 is output. These light emitting element 26 to light receiving element 34
The second head 3-2 is thus configured.

The signals from the first head 3-1 and the second head 3-2, that is, the transmitted light receiving element 16, the reflected light receiving element 17,
The light amount signals from the respective elements of the red light receiving element 22, the green light receiving element 25, the front transmitted light receiving element 30, and the rear transmitted light receiving element 31 are sent to the A / D converter 35 constituting the judgment control section 12. After input and A / D conversion, CP
Input to U36.

The CPU 36 performs the following arithmetic processing based on this input data. That is, the signal of each light quantity input is stored in the memory (R
AM), the transmitted reflectance (T / R) is calculated from the stored diffuse transmitted light amount (T) and diffuse reflected light amount (R), and the wavelength 660n in the diffuse reflected light amount (R) is calculated.
m red diffused reflection light amount (Re) and wavelength 550 nm
The spectral ratio (Re / G) is calculated from the amount (G) of the diffused reflected light (G) of green and stored in the RAM as determination data. Further, the front-to-back transmission ratio (FT / BT) is calculated from the front transmitted light amount (FT) and the rear transmitted light amount (BT) in the long axis direction of each grain of each sample 8.
Is calculated and stored in RAM as judgment data, and the quality of each sample 8 is judged by collating the judgment data stored in these RAMs with six preset judgment blocks.

The detection signal of the timing hole 5 input from the light receiving element 34 of the second head 3-2 is also input to the CPU 36,
36 controls the A / D converter 35 and the like based on this signal. Reference numeral 37 in FIG. 3 is a printer for printing the determination result and the like.

FIG. 4 is a diagram showing a determination block created based on experimental data when a sample after hulling was measured.
In this figure, the horizontal axis is the transmission / reflection ratio T / R and the vertical axis is the spectral ratio Re / G. A is a block of good quality grains, B is a block of immature grains, C is a block of damaged grains, and D is a colored grain. Block, E is dead rice block, and F is paddy block.
The range of values of the horizontal and vertical axes of each of the six blocks A to F is set in the CPU 36 in advance.

Next, the operation of this invention will be described with reference to the flowchart of FIG.

When the sample 8 after hulling is put into the sample supply unit 11, the number n of samples to be measured is set, and when the measurement is started (50), it is judged whether or not it is the measurement timing (51). If it is the measurement timing, , YES in this judgment (51), and the CPU
Re / and T / obtained by the above-described arithmetic processing of 36
The sample is classified (52) according to the value of R. This classification is performed by comparing the measured Re / G and T / R values of the sample 8 with the previously set six determination blocks.

Then, when the sample is classified, it is judged (53) whether or not the classification is “paddy”, and in the case of NO in this judgment (53), that is, when the classification is other than “paddy”, the number of samples is n. Normal processing such as sorting based on the count and the judgment result of the sample 8 (5
4) is performed. When the determination (53) is YES, that is, when the classification is “hull”, the number of samples n is not counted and the samples 8 are not sorted (55), and 1 is added to the number of hulls n0 (56). 1 for every n0 of this paddy
The addition of means that only paddy is counted, and this “paddy” is not sorted and falls as a residual grain into a residual grain case (not shown).

Next, it is judged whether or not the measurement of the predetermined number of samples n is completed (57). If NO, the process returns to the step (51), and the steps (51) to (56) are judged (Y) in the judgment (57).
Repeat until S is reached, and if the determination (57) is YES, the printer 37 prints the measurement result,
The measurement is ended (59). The printing in the step (58) is performed by, for example, the number of measured samples n, the ratio of each of the above 6 categories (expressed as a percentage), the ratio of cracked rice, the number of holes, and the number n of paddy.
0, a quality rank (for example, three grades of A to C), a hulling rank, etc. are appropriately printed. The printing method is not limited to printing by a printer, and the measurement result may be displayed on a display, for example.

In addition, in the above-mentioned embodiment, the case where six determination blocks are provided is set, but the number may be increased or decreased as appropriate.

“Effect of Device” As described in detail above, according to this device, the judgment block of the judgment control unit is provided with the classification of “hull”, and the sample is
If it is determined that the sample is not the measurement target, even if the sample contains paddy, it is automatically determined and excluded from the measurement target, so there is no erroneous determination that the paddy is a colored particle. The quality of the sample can be measured with high accuracy.

There is no need to remove paddy from the sample before measurement, and work efficiency is not reduced.

It is possible to know the mixing ratio of the paddy in the sample from the number determined as the paddy, and it is possible to give guidance on the working of the paddy.

And so on.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a grain quality determination device embodying the present invention, FIG. 2 is a right side view of the same, FIG. 3 is a circuit diagram showing a relationship between a detection unit and a determination control unit, and FIG. Shows a decision block, and FIG. 5 is a flow chart showing an example of the operation of the present invention. 1 ... Quality determination device, 2 ... Rotating disk, 3 ... Detection unit, 4 ... Sampling hole, 5 ... Timing hole, 8 ... Sample, 11 ... Sample supply unit, 12 ... Judgment control Section, 35 ... A / D converter, 36 ... CPU, 37 ... Printer.

Claims (1)

[Scope of utility model registration request] 1. A transfer device for supplying a sample to each particle and each sample provided integrally with the transfer device are irradiated with light to diffuse and transmit a diffused light amount (T) and a diffuse reflected light amount (R). In the amount of reflected light, the amount of light of two wavelengths in the red light region and the green light region (Re,
G) and a light quantity ratio (T / R, Re / G) are calculated based on the detection value input from this detector, and this and a determination block preset for each of a plurality of classifications. In a grain quality determination device having a determination control unit for individually determining the quality of a sample for comparison, the determination control unit provides a “paddy” block in the determination block, and determines this “paddy”. An apparatus for determining the quality of grains, characterized in that the prepared sample is excluded from measurement targets.