JPH0310060B2 - - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to an improvement in a particle size measuring device.

Frequent occurrence of broken rice due to milling not only reduces the taste but also reduces the milling yield. Therefore, it is necessary to constantly check the generation of crushed grains and adjust the rice milling machine to keep the amount of crushed grains as small as possible.

Conventionally, the ratio of crushed grains during rice milling was calculated by randomly extracting 20 kg from the outlet of the rice milling machine, taking out rice grains whose length was 2/3 to 1/4 of a full grain, and calculating the ratio of crushed grains. The quality of the rice was controlled by adjusting the rice milling machine according to the ratio. For example, the conventional artificial method of weighing 20 kg of sample milled rice, sorting the length of the rice grains, weighing only the crushed grains, calculating the weight ratio, recording the ratio, and post-processing the crushed grains is difficult to manage during milling. The disadvantage was that it could not be completed quickly, and it could not be used effectively for quality control during polishing.

The present invention solves the above-mentioned drawbacks, and is a high-performance automated device that automatically measures crushed grains optically from a sample of polished rice, and also displays the total number of measured rice grains and their crushed grain ratio in a short time. We aim to develop and provide this service.

The present invention will be explained with reference to embodiment figures. In FIGS. 1 and 2, a vibrating grain feeding trough 3 provided with grain feeding grooves 2 for laterally transferring rice grains is installed inside a box-shaped machine frame 1 in the form of a horizontal structure, and on the discharge side thereof. A slanted grain trough 5 provided with grain grooves 4 through which rice grains flow down in vertical rows is provided in series, and an slanted grain feeding trough 6 is installed on the side of the grain trough 5.
are laid horizontally in parallel, and the discharge port 7 of the grain feeding gutter 6 is connected to the grain feeding gutter 3 to the supply port 8, and a supply hopper 9 is provided above the lower receiving part of the grain feeding gutter 6, 10
is a vibration device for the inclined grain feeding trough 6.

Next, the grain flow gutter 6 is provided with a grain detection transparent part 11 in the grain flow groove 4, and a light source 12 and a light receiving element 13 are arranged above and below the transparent part 11 in a substantially opposing manner. A light receiving element 13 that receives the transmitted light beam of the rice grains passing through the transparent part 11 is electrically connected to a display 15 via a grain measuring part 14. In addition, a transparent window 1 for flow velocity measurement is provided at an arbitrary predetermined distance A in the upstream direction of the transparent part 11 provided in the grain flow gutter 6.
6 is provided, and a position detection sensor 17 and a light source 18 are arranged above and below the transparent window 16 in a substantially opposing manner,
The detection sensor 17 is connected to the particle crushing measuring section 14 by a conductive wire, and 19 is a setting device for setting a reference particle length for particle size regulation.

FIG. 4 is a block diagram of the crushed grain measuring section 14, in which a light receiving element 13 for measuring the grain length of grains and a position detection sensor 17 for measuring the flow velocity of grains are installed on the input side of the crushed grain measuring section 14, respectively. At the same time, a display 15 is connected to the output side of the crushed grain measuring section 14 for displaying the crushed grain ratio, the total number of grains measured, etc. Further, inside the grain crushing measuring section 14, there is a total grain number detection device connected to the light receiving element 13, which detects the total number of rice grains to be measured according to the output from the light receiving element 13, and transmits the signal to the display 15. 20, a reference grain length setting device 21 connected to a setting device 19 for setting a standard grain length for grain size adjustment, a grain length connected to a light receiving element 13 and measuring the grain length of grains according to the output from the light receiving element 13; The rice grains are connected to the measuring device 22, the position detection sensor 17, and the light receiving element 13, and the falling velocity of the grains is detected according to the output from the position detection sensor 17 and the light receiving element 13, and the velocity change is measured. Grain speed correction device 2 for correcting the grain length of
3. A crushed particle number totaling device 24 that connects to the particle length measuring device 22 and totals the measured crushed particle number, and a crushed particle number integrating device 24 that connects to the total particle number detection device 20 and the crushed particle number totaling device 24 to calculate the crushed particle ratio and display the signal and display. It is equipped with a crushing ratio calculation device 25 that transmits data to the container 15, and a display device 15.
The crushed grain ratio, total number of grains measured, etc. are displayed respectively.

Next, FIG. 3 shows the transmitted light rays (light and dark shadows) on each grain surface of various rice grains (sized grains, brown rice, grained paddy, broken grains, split grains, immature grains, and dead rice) that pass through the transparent part 11. FIG. 3 is an explanatory diagram in which the grain surface is scanned in a count pattern and the changes in brightness and darkness in each part of the grain surface are represented by solid lines.
Therefore, crushing and grading can be easily determined by comparing the lengths of bright and dark shadows caused by the transmitted light (in the case of light reception signals, the length of their duration).

In addition, the friction coefficient of the grain surface of the rice grain changes depending on the accuracy of pounding, etc., and the length of the light and dark shadows of the rice grain differs depending on the change in the flow rate.
The grain speed correction device 23 provided in the crushed grain measurement unit 14 of the present invention measures the passing time of an arbitrary predetermined distance A provided on the 5 surface of the downflow gutter using the position detection sensor 17 and the light receiving element 13. At the same time, the lengths of the bright and dark shadows are each corrected based on the measurement signal, so it is possible to always measure the grain length of the crushed flow with high precision. 3 to 1/4) can be calculated and displayed separately.

With the above configuration, the sample polished rice is put into the supply hopper 9, and the standard grain length for grading (reception signal duration of transmitted light for standard grading) is set in the setting device 19.
When the setting value of the setting device 19 is set and the device is started, the setting value of the setting device 19 is changed to the reference particle length setting device 21 of the crushed particle measuring section 14.
and the rice grains in the supply hopper 9 are
The rice grains are fed upward by the inclined grain feeding trough 6 and flow into the grain feeding groove 2 of the vibrating grain feeding trough 3, and the rice grains slide through the grain feeding groove 4 of the flowing grain trough 5 to measure the flow velocity. transparent window 1
6 and the grain detection transparent section 11, respectively. The rice grains passing through the transparent window 16 at the upper position are irradiated by the light source 18, and the transmitted light is received by the position detection sensor 17, and the rice grains passing through the grain detection transparent part 11 at the lower position are The light receiving element 13 receives the transmitted light emitted by the light source 12, and each signal received by the detection sensor 17 and the light receiving element 13 is inputted to the particle size measurement section 14, respectively. Then, the grain speed correction device 23 inside the crushed grain measurement unit 14 measures the grain flowing speed (passing time for a predetermined distance A) based on each input signal, as explained in FIG. With,
The measurement signal is input to the grain length measuring device 22 to correct the light reception signal from the light receiving element 13 (the length of the light and dark shadow of the light beam transmitted through the rice grain), and the corrected signal is inputted from the reference grain length setting device 21. The grain length of the grain is measured by comparing it with a set signal, and the measurement signal that detects crushed grains is input to the crushed grain number integrating device 24, where the number of crushed grains is integrated. Further, the branch signal from the light receiving element 13 is input to the total grain number detection device 20 to detect the measured number of grains and display the total number of grains on the display 15, and the crushing ratio calculation device 25 Crushed particle number integration device 24
and each signal of the total grain number detection device 20 are input, the ratio between the total number of grains and the number of crushed grains is calculated, and the crushed grain ratio is displayed on the display 15. Therefore, the ratio of crushed grains to a given total number of grains can be easily recognized, and the load adjustment of the rice milling machine can be carried out accurately.

In this way, the particle crushing measuring device of the present invention has a light source and a light receiving element arranged above and below a transparent part for detecting grains provided in a gutter through which rice grains flow down, in a substantially opposing manner. A light-receiving element that receives transmitted light is connected to a display via a particle size measurement section, and the particle size measurement section has a reference particle length setting device and a total particle number detection device, and a particle size measurement device that is connected to the light reception device. Since it is equipped with a device and a crushing ratio calculation device, it is possible to optically measure crushed grains from sample rice grains and achieve automation of highly accurate crushed grain measurement, simplifying the work of measuring crushed grains and increasing the total number of grains measured and crushed grains. The ratio can be displayed in a short time, and the load adjustment of the rice milling machine can be carried out as early as possible, so that high-quality polished rice can always be ensured.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. Figure 1 is a side sectional view of this device, Figure 2 is a plan view of its grain trough, Figure 3 is an illustration of the brightness and shade of the transmitted light beam through rice grains, and Figure 4 is a block diagram of its grain crushing measuring section. be. 1... Box-shaped machine frame, 2... Grain feed groove, 3... Vibrating grain feed gutter, 4... Grain flow groove, 5... Grain flow gutter, 6
... Inclined grain feeding trough, 7 ... Discharge port, 8 ... Supply port,
9... Supply hopper, 10... Vibration device, 11...
... Transparent part for grain detection, 12 ... Light source, 13 ... Light receiving element, 14 ... Grain measurement section, 15 ... Display device,
16... Transparent window for flow velocity measurement, 17... Sensor for position detection, 18... Light source, 19... Setting device, 20
. . . Total grain number detection device, 21 .

Claims (1)

[Scope of Claims] 1. A light source and a light-receiving element are arranged above and below a transparent part for detecting grains provided in a gutter through which rice grains flow down, so as to substantially face each other, and receive the transmitted light of the rice grains passing through the transparent part. A light-receiving element is connected to a display via a crushing measuring section, and the crushing measuring section has a reference grain length setting device and a total grain number detecting device, and also has a grain length measuring device and a crushing ratio connected to the light-receiving element. A particle crushing measuring device characterized by having a calculation device. 2. The crushed grain measuring device according to claim 1, wherein the crushed grain measuring section includes a grain speed correction device that corrects the measured grain length based on a grain flow velocity.