SU1446521A1 - Apparatus for automatic control of laboratory sampling of seeds - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agriculture and processing industry. The purpose of the invention is to improve the accuracy of seed sampling and quality control of seed calibration. The device for automatic control of laboratory sampling of seeds includes a control unit 15, a seed weight sensor 1, a sampling shaft position sensor 2 and a seed sensor 14 in the feed line. The device allows you to check every eighth bag, monitor the quality of the packaging and the seeds being packaged. Sampling is carried out in one revolution of the sampler shaft. This process is provided by a control unit 15 having a complex structure, which is performed according to the requirements of the technological process. 1 il. : th

Description

. The invention relates to agriculture and processing agricultural products from industry, in particular, to devices for the selection of laboratory samples of seeds of agricultural crops.

The aim of the invention is to improve the accuracy of seed sampling and quality control of seed calibration.

The drawing shows a block diagram of an automatic control device for the selection of laboratory seed samples.

The device contains a seed weight sensor 1, a sampling shaft position sensor 2, a pulse counter 3, counting through the RS trigger 4 the number of input pulses from the seed weight sensor 1, RS trigger 5, connected to the output of the sensor 2 position the sampler shaft, and the output to the D-input of the D-trigger 6 for recording information, the clock generator 7, the output of which is connected to the synchronization input of the D-trigger 6, 8 coincidence circuit, the inputs connected to the binary outputs of the counter 3 pulses, and - to one of the inputs of the one-shot 9 directly, and another, to increase noise immunity, through an inverter 10, a one-shot 9, an output connected to an installation input to 1 D-flip-flop 6, the output of this trigger is connected to an input of a control key 11 having a relay characteristic and a sampler driving the motor 12 setting the initial parameters, which serves to take the first sample immediately after switching on the control device for taking laboratory samples of seeds for the selection of the next seed fraction, and the sensor 14 for the presence of seeds in the feed pipe. Elements 3-11, 13 are part of the control unit 15 of this device.

The device works as follows.

When the grain fraction arrives from the tank for storing them into the feed pipe, the sensor 14 having seeds, acts on the node 13 of the initial parameters, zeroes the outputs of the counter 3 pulses, and the resolution levels are set at the input of the coincidence 8. 8 matches toggles the one-shot 9 in position

, nd

with

YU

15 20 25 JQ Q. S

35

50

55

This means that the output signal of the latter sets the S-input to the state of the logical unit D-flip-flop 6, prohibiting the D-input to record the incoming information. From the output of this D-flip-flop 6, the enable signal of the logical unit opens the control key 11, connecting the sampler motor 12 to the electric. chesky network. At the same time, the sampling motor 12, through the first chain drive, rotates the auger rotating at a constant speed inside the hollow shaft driven by the second chain gear, which in turn is installed in the body of the sampling unit, through which the grain flow of calibrated seeds moves . The sampler starts sampling.

After the time specified by the time parameters of the single-vibrator RS-circuit 9 (1.5-2.0 s), the signal from the D-flip-flop setting 6 to the state of the logical unit will be removed from the output of the one-shot 9, but at this point in time, the sampling motor 12, being a cnun, rotates the sampler shaft, while the sensor 2 is in position. the shaft switches to the state in which the output of the RS flip-flop 5 will be a logical unit signal and pulses from the clock generator 7 this signal will be recorded at the D-input to the flip-flop 6, maintaining the control key 11 in the open state until the shaft After one rotation of the sampler, the shaft position sensor 2 again switches to the state in which the logical zero level is output at the output of the RS flip-flop 5. Clock pulses from the generator 7. this logical zero is written to the D-flip-flop 6, and from its output the inhibit signal will close the control key 11, stopping: the sampler is in operation. The selection of the first sample is completed. Upon receipt of the seed fraction on the scales, the sensor 1 of the seed weight accumulates the scale mechanism. When seed is packaged with seeds, the balance is released, the seed weight sensor 1 returns to. the initial state, while in the counter of 3 pulses a logical unit is detected. By vivs with the inputs of the circuit 8 matches the combination of input sig3

Inverter through the inverter 10 prohibits the one-shot bot 9 for the counting time of pulses with a counter of 3 pulses, which increases the noise immunity of the device. The resolving combination of levels at the inputs of the scheme 8 matches again in accordance with the packaging of the 8th bag (16th, 24th, 32nd) and so on until the end of the packing of the fraction. In this case, the operation of the device is repeated as described. ; The need to check every eighth bag is caused by the requirement of constant laboratory control during the entire shift after the course of the packaging and the quality of the seeds in the bagging machine. This allows you to quickly make a decision when the impurity content and damaged grains appear in the seeds according to GOST. Moreover, the purity of the seeds for the first class should be 99%, the number of seeds with macrotrauma in the area

pa-

6521

Using the invention will allow laboratory selection. seed samples, such as corn, in strict accordance with the requirements of GOST and uniformly monitor each fraction of seeds for the presence of impurities and damaged grains.

Claims (1)

Invention Formula A device for automatic control of laboratory sampling of seeds, containing an electric motor with a gearbox, a seed sampling unit with a shaft position sensor, a seed presence sensor in the supply line and a control unit, characterized in that, in order to increase seed sampling accuracy and quality control of seed calibration, the device is equipped with a seed mass sensor, and the control unit is made in the form of two RS-triggers, a pulse counter. embryo must be set up for the first 25 data recording trigger, clock This class is not more than 20%, so when taking a sample with the help of this device, the total sample of each fraction is taken to reflect the actual quality of the batch and 5 samples per 1 ton of opened and tacked seeds are optimal. For example, when the capacity of the corn calibration shop is 25 tons of seeds per shift, the seeds are calibrated (for example, take one of the shifts): 1 Fractions Number bags The first Second Third A quarter Pta Sixth 44 360 512 80 34 18 Number of samples 6 46 65 P five 3 From this example, it is obvious that with a total sufficiently large batch of seeds, the number of samples for each fraction of seeds turns out to be small. 0 five 0 five 0 a generator, a coincidence circuit, an inverter, a one-shot with a master circuit time, a control key, and an initial parameters setting node; the seed mass sensor is connected via a first RS flip-flop to a counting input of a pulse counter, whose outputs are connected to the corresponding inputs of a coincidence circuit, the output of the latter is connected directly to the first input of the one-shot one-shot, and to the second. through an inverter, the outputs of the one-shot, clock generator and the second RS flip-flop are connected respectively to the S input, the input blue synchronization and D-input of the information recording trigger, while the inputs of the second RS-trigger are connected to the corresponding outputs of the shaft position sensor, the output of the information recording trigger is connected to the motor terminals via the control key, and the output of the seed sensor in the supply pipe is connected the input node of the installation of the initial parameters, the output of which is connected to the R-input of the meter pulse.