JPH0319934B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a grain feeding amount control device for a grain yield/grain number measuring machine. A grain yield/grain number measuring machine is capable of ensuring that grains flowing down an inclined flow grain channel connected to a photoelectric detection device pass through the photoelectric detection device while reliably maintaining a predetermined velocity and particle spacing. , which is extremely important to improve measurement accuracy. In addition, since the grain size and friction coefficient of grains vary depending on the variety, processing conditions, etc., it is necessary to adjust the discharge amount of the supply hopper and the conveyance force of the vibrating conveyance gutter appropriately according to changes in conditions. There is. In view of the above-mentioned points, the present invention provides a grain density detection sensor in the vibrating grain feeding trough, a particle detection sensor in the inclined flow grain trough, and connects each of the detection sensors and the light receiving element to the grain feeding amount control section. By electrically connecting the variable vibration device provided in the vibrating grain feeder and the variable rotation device of the rotary valve provided in the supply hopper, the amplitude of the vibratory grain feeder can be adjusted according to the grain size of various grains. The amount of grain fed is controlled by adjusting the rotation speed of the rotary valve,
The purpose of the present invention is to develop and provide a high-performance device that allows grains flowing down an inclined flow grain trough to maintain a predetermined speed and particle spacing to carry out high-precision yield and grain number measurements. . The present invention will be explained with reference to embodiment figures. Reference numeral 1 denotes a box-shaped machine frame, and inside the machine frame 1 is installed an inclined flow grain trough 3 provided with a plurality of rows of grain grooves 2A, 2B, ... 2E, 2F. A vibrating grain feeding gutter 5 provided with multiple rows of grain feeding grooves 4A, 4B, ... 4E, 4F is connected to the supply side of the grain feeding gutter 5, and a supply hopper 6 is mounted on the feeding side of the grain feeding gutter 5, Said grain groove 4
Photoelectric detection devices 9 consisting of a light source 7 and a light receiving element 8 are provided at the upper and lower positions of the falling trajectory P of the rice grains flowing down from A, 4B, ... 4E, 4F, and each detection device 9 is connected via a control circuit 10. A flow path switching valve 12 connected to the grain count meter 11 and for blocking or opening the rice grain flow path Q is provided between the gutter end of the inclined flow grain gutter 3 and the photoelectric detection device 9, and the flow path Q of the rice grains is A grain weight scale 13 is placed at the position where the rice grains flow down.
A grain discharging tube 14 is also provided at the position where the rice grains that are cut off by the switching valve 12 fall, and the weighing scale 13 is connected to a yield meter 16 via an arithmetic circuit 15. A vibration device for the grain trough 5, 18 a weighing container of a weight scale, 19 a load cell connected to the container 18, 20 an automatic opening/closing valve for the weighing container,
21 is a grain number setting device provided in the grain number meter. Next, the grain feeding amount control device provides a grain density detection sensor 22 in the vibrating grain feeding trough 5, and a grain length detection sensor 23 consisting of a plurality of sensors in the inclined flow grain trough 3. sensor 22,
23 and the light receiving element 8 are provided in the vibrating grain feeding trough 5 via the grain feeding amount control section 24.
5 is electrically connected to a variable rotation device 27 of a rotary valve 26 provided in the supply hopper 6, and the amplitude of the vibrating grain feeding trough 5 and the rotation speed of the rotary valve 26 are controlled according to the grain size of various grains. It is configured to be adjusted to control the amount of grain fed. FIG. 3 is a block diagram of the grain feeding amount control section 24, in which the light receiving element 8 and each of the detection sensors 22, 23 are connected to the input side of the grain feeding amount control section 24, and the grain feeding amount control section A variable vibration device 25 provided in the vibrating grain feeding trough 5 and a variable rotation device 27 of the rotary valve 26 are connected to the output side of the rotary valve 24,
In addition, the grain feeding amount control unit 24 includes a reference grain interval setting device 28 that sets a reference problem for each grain flowing down the inclined flow grain trough 3, and a reference grain interval setting device 28 for setting a reference problem for each grain flowing down the inclined flow grain trough 3; A reference grain density setting device 29 for setting the density, a grain length correction coefficient setting device 30 for estimating the grain size based on a change in the grain length of the grain, and correcting the rotation speed based on the size change in the grain size, and a light receiving device. A particle spacing detection device 31 that detects the particle spacing according to the output from the light receiving element 8, a particle spacing detection device 31, and a reference particle spacing setting device 28, Interval setting device 2
The amplitude correction calculation device 32 calculates the vibration value to be corrected according to the output from the amplitude correction calculation device 32, and changes the supply voltage of the variable amplitude device 25 according to the output from the amplitude correction calculation device 32. an amplitude control device 33 that controls the amplitude of the vibrating grain feed trough 5; and a grain density detection device 34 that communicates with the grain density detection sensor 22 and detects grain density per unit area according to the output from the grain density detection sensor 22. , a grain length detection device 3 that communicates with the grain length detection sensor 23 and detects the grain length of the grain according to the output from the grain length detection sensor 23.
5. Contact the grain density detection device 34, grain length detection device 35, and grain length correction coefficient setting device 30, and according to the output from the grain density detection device 34, grain length detection device 35, and grain length correction coefficient setting device 30. A rotation speed correction calculation device 36 that calculates the rotation speed to be corrected is connected to the rotation speed correction calculation device 36, and the rotation speed correction calculation device 3
The rotation speed control device 37 changes the rotation speed of the variable rotation device 27 according to the output from the rotary valve 6 to control the discharge amount of the rotary valve 26. Since the above-mentioned configuration is adopted, an arbitrary predetermined number of grains (for example, 10,000 grains) is set in the grain number setting device 21 of the grain number meter 11, and the flow path is opened by operating the flow path switching valve 12. When brown rice is put into the supply hopper 6 and the device is started, the brown rice flowing down from the supply hopper 6 flows down to the supply side of the vibrating grain feeding gutter 5 and flows into the grain feeding grooves 4A, 4B, ... 4E, 4F. The brown rice flowing into the grooves 4A, 4B, .
A, 2B, . . . 2E, 2F and flow out from the end of the gutter in a flight shape along each of the flow trajectories P. The brown rice passing through each of these flowing trajectories P is irradiated by the light source 7 of each photoelectric detection device 9, and each of the transmitted light beams is received by the light receiving element 8, and the detection signal is transmitted via the control circuit 10. The number of brown rice grains detected is displayed by inputting it into the grain count meter 11. When the detected number of grains of brown rice reaches the number of grains set by the grain number setting device 21, the flow path switching valve 12 is switched by a signal from the control circuit 10 to shut off the flow path and drain the following brown rice. It flows down into the cylinder 14 and is removed, and the measuring container 18
A weighing scale 13 measures the weight of brown rice accumulated in the container,
The measurement signal is sent to the yield meter 16 via the arithmetic circuit 15.
is entered and its weight value is displayed. Next, white rice obtained by milling the brown rice is collected, the switching valve 12 is switched to open each flow path, and the white rice is put into the supply hopper 6 and the device is started.
The weight of a predetermined number of grains of white rice is measured using a weighing scale 13 through a flow detection process similar to that for the brown rice, and the measurement signal is input to an arithmetic circuit 15 to compare and calculate the weight of the brown rice and calculate the weight of the brown rice. Calculate the retention rate and use the yield meter 16
will be displayed. The grain feeding amount control device of the present invention controls the grain feeding amount in accordance with the grain size of each type of grain in the step before measuring the number of grains of brown rice and white rice described above. First, inclined flow grain trough 3
At the same time, set the standard grain interval (for example, 40 mm) of grains flowing down in the standard grain interval setting device 28, and set the grain density per unit area of the vibrating grain feeder 5 (for example, 5 grains/cm ² ). The reference grain density setting device 29 is set, and the grain length correction coefficient shown below is set in the grain length correction coefficient setting device 30. The above-mentioned grain length correction coefficient is obtained by determining the relationship ratio between grain length and grain size of various grains in advance, and calculating a correction coefficient (correcting the rotation speed of the rotary valve) depending on the size of the grain size. Some of the correction coefficients determined based on experimental values are shown below.

[Table] Next, the grains to be measured are fed to the hopper 6.
When the device is started, the photoelectric detection device 9
The light reception signal of the light receiving element 8 provided in the grain feeding amount control section 2
The amplitude correction calculation device 32 inputs the detection signal and the setting signal of the reference grain spacing setting device 28 to determine the amplitude value to be corrected. The amplitude control device 33 which calculates and inputs this corrected amplitude value issues a control signal to change the supply voltage of the variable amplitude device 25 to control the amplitude of the vibrating grain feeding trough 5, thereby controlling the slope grain feeding trough 3.
The particle spacing of grains flowing down is corrected to the standard spacing. Further, a grain density detection device 34 detects the grain density per unit area by inputting the detection signal of the grain density detection sensor 22 provided on the side of the vibrating grain feeding trough 5;
Each detection signal of the grain length detection device 35, which detects the length of grains flowing down by inputting the detection signals of the grain length detection sensor 23 provided on the side of the inclined flow grain trough 3, is inputted to the rotation speed correction calculation device 36. At the same time, the correction calculation device 36 inputs each setting signal of the reference grain density setting device 29 and grain length correction coefficient setting device 30 to control the rotary valve 26 of the supply hopper 6 according to the grain whose grain length has been measured. Calculate the rotation speed. That is, the corrected rotational speed is calculated by proportionally measuring the measured grain density and the reference particle density, and then a grain length correction coefficient is selected based on the measured grain length, and the corrected rotational speed is multiplied by the correction coefficient to calculate the corrected rotational speed. The number of rotations will be calculated. The rotation speed control device 37 into which this control rotation speed is input issues a control signal and changes the operation of the variable rotation device 27 to control the rotation of the rotary valve 26. Therefore, the rotary valve 26 of the supply hopper 6 responds to changes in particle size. The vibrating grain trough 5 vibrates and transports the grains at an appropriate grain density according to the change in grain size and discharges the grains from the end of the trough. The various grains flowing down 3 maintain arbitrary predetermined speeds and particle spacing to achieve high-precision yields and grains.
This has the effect that particle number measurement can be carried out reliably at all times.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of the apparatus, FIG. 2 is a plan view of the inclined flow grain trough, and FIG. 3 is a block diagram of the grain feed rate control section. 1...Box-shaped machine frame, 2A, 2B,...2E, 2F...Flow grain groove, 3...Slope flow grain trough, 4A, 4B,...4
E, 4F... Grain feeding groove, 5... Vibrating grain feeding trough, 6... Supply hopper, 7... Light source, 8... Light receiving element, 9... Photoelectric detection device, 10... Control circuit, 11... Grain number meter, 12
...Flow path switching valve, 13...Grain weighing scale, 14...Grain discharging tube, 15...Arithmetic circuit, 16...Yield meter, 17...Vibration device, 18...Measuring container, 19...Load cell, 2
0... Automatic opening/closing valve, 21... Grain number setting device, 22... Grain density detection sensor, 23... Grain length detection sensor, 24
...Grain feeding amount control unit, 25...Variable vibration device, 26...Rotary valve, 27...Variable rotation device, 28...Reference grain interval setting device, 29...Reference grain density setting device,
30... Grain length correction coefficient setting device, 31... Particle spacing detection device, 32... Amplitude correction computing device, 33... Amplitude control device, 34... Grain density detection device, 35... Grain length detection device, 36... Rotation speed correction computing device , 37... Rotation speed control device.

Claims (1)

[Claims] 1. A vibrating grain feeding gutter is connected to the inclined flow grain gutter through which the grains flow down, and a supply hopper is connected to the supply side of the grain feeding gutter, and a light source is attached to the trajectory of the grains flowing down from the inclined flow grain gutter. In a measuring machine equipped with a photoelectric detection device consisting of a light receiving element and a grain flow path switching valve, a grain density detection sensor is provided in the vibrating grain feeder, and
A grain length detection sensor is provided in the inclined flow grain trough, a variable vibration device is provided in the vibrating grain feeding trough, and a rotary valve is provided in the supply hopper. The grain feeder is electrically connected to a variable rotation device of the grain feeder, and the amount of grain fed is controlled by adjusting the amplitude of the vibrating grain feeding trough and the rotation speed of the rotary valve according to the grain size of each grain. Grain feed rate control device for yield/grain number measuring machine.