SU1138062A1 - Apparatus for controlling operation of agricultural units - Google Patents

Abstract

1. DEVICE FOR CONTROL OF WORK OF AGRICULTURAL UNITS by author. St. No. 1049001, characterized in that, in order to increase the control efficiency by eliminating the indication of short-term faults, it is equipped with an on-line storage unit and a clock counter connected to its address inputs, while the control inputs of the counter and the random access memory are connected to the output of the control unit, the information input of the operational storage unit is connected to the output of the OR element, and the output of the operational storage unit is connected to one of the inputs of the control unit and the unit ignalizatsii. 2. A device according to claim 1, characterized in that the control inputs of the random access memory are connected to the output of the control unit via a mode switching unit write-read. (L

Description

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The invention relates to agricultural machinery, in particular, to devices for controlling the operation of wide-scale agricultural units. According to the main author. St. No. 1049001 a device is known for monitoring the operation of agricultural units, including its control sensors, a memory unit associated with controlling the input with the output of the sensor, and the outputs through the logical switch with the inputs of the OR element whose output is connected to the inputs the alarm unit and the control unit, and the outputs of the latter are connected to the control, their inputs to the logic switch and the signaling unit. The device also has threshold elements with adjustable trigger thresholds and a trigger threshold adjustment signal conditioner. The input of the latter is connected to the output of the rotation sensor, and the output with the control inputs of the threshold elements, the signal inputs of which are connected to the outputs of the monitoring sensors, and the outputs of the threshold elements are connected to the inputs of the memory unit 1. A disadvantage of the known device is the low efficiency of the controls. As the experience of the use of the seed has shown, during operation, short-term blocking of the openers or these wires is possible, which after a certain period of time self-erect due to vibrations of the openers in the process of moving the unit. However, these clogings are recorded by a known yktpochtom, information is given to the instrument's console, which leads to unnecessary stoppages of the unit and, accordingly, to a decrease in its performance. The purpose of the invention is to increase the efficiency of monitoring by eliminating the indication of short-term failures. This goal is achieved by the fact that the device is equipped with a random access memory unit and a clock counter connected to its address inputs, while the control inputs of the counter and random access memory are connected to the output of the control unit, the information input of the operative storage unit is connected to the output of the OR element, and the output operational storage unit connected to one of the inputs of the control unit and the alarm unit. Moreover, the control inputs of the random access memory are connected to the output of the control unit through the write-read mode switching unit. The drawing shows a block diagram of the proposed device. The device contains sensors 1 controlling the operating parameters of the device, which react to the flow of sown seeds, whose outputs through threshold elements 2, sensitive to the frequency of the input pulses, are connected to the inputs of memory block 3. The control inputs of the threshold elements are connected via the tuning signal generator 4 to the output of the rotation sensor 5 of the shaft of the sowing apparatus, kinematically connected with the wheels of the crop. The output of the memory unit through the logical switch 6, formed by elements 7 and an annular distributor 8 pulses, is connected to the inputs of the element OR 9, the output of which is connected to the input of the signaling unit 10 and the input of the control unit 11, which includes the generator 12, the element AND 13, element OR 14, D-flip-flop 15, one-shot 16 and 17, and button 18 for polling channels. The signaling unit includes counters 19 and 20 pulses, digital indicators 21 and 22, a buzzer 23 and a controlled power amplifier 24. The output of the melting unit 11 is connected to the control input of the counter 25 clock pulses and the mode switching block 26 write-read the control inputs of the on-line storage unit (OZB) 27, the information input of which is connected to the output of the element OR 9 address inputs to the counter 25, and the output unit 27 is connected to one of the inputs of the signaling unit 10 and the control unit II. The device works as follows. When the power is turned on, the trigger 15 is set to state "1, and the pulse distributor 8 is set to state 1 at the first output and state O at the other outputs. In the result of this, the counters 25, 19 and 20 are set to the state "O", which corresponds to the digit "O" on the indicators 21 and 22. The generator 12 generates pulses of positive polarity, which are fed to the input of the counter 25, the inputs of the distributor 8 and the element I 13. Under the action of these pulses, the distributor alternately generates a pulse of positive polarity at each output, shifted relative to the previous clock by one clock, determined by the frequency of the generator 12. At the same time, the counters of the alarm units and the counter 25 count the pulses t of the generator 12. Since the number of pulses arriving at the inputs of the ring distributor 8, the counters of the alarm unit and the counter 25 are the same, each state "1 at the output of the distributor corresponds to the number dialed on the indicators 21 and 22, and the binary code of this number at the outputs counter 25, addressing the memory cell OZB 27. Information accumulated by the counters for one cycle of operation of the distributor is reset to the beginning of the cycle, at the moment of arrival of the pulse from its first output, and the same pulse, having entered the control unit 11, flips the trigger 15. At this point, the generator 12 stops generating pulses and the system goes into a standby state until the next pulse arrives from the rotation sensor 5. The pulse from the rotation sensor is fed to the input of the one-shot 17 and the trigger 15 is set to state "1, and the generator 12 starts generating pulses again and the polling cycle repeats. During a normal monitored process, the frequency of the pulses coming from sensors 1 is higher than the threshold frequency of the elements 2 which is determined by the magnitude of the tuning signal at the outputs of the former 4, which in turn is a function of the frequency of rotation of the shaft of the seeding unit and the speed of movement of the unit. In this case, at the outputs of the elements 2, the voltage of the logic "O" is set, which is fed to the inputs of the memory block 3.

The information rewritten to the outputs of the memory block 3 by pulses arriving at the synchronization input from the rotation sensor 5 is fed to the inputs of the elements 7. And the outputs of the elements 7 and the element OR 9 are set to the voltage "O, which corresponds to the inhibit signal input to the element And 13, the trigger does not change its state.

When the speed of movement of the crop changes, the value of the tuning signal at the output of the generator 4 changes, which ensures the automatic adjustment of the response threshold of the elements 2 synchronously with the change in the speed of movement of the unit. So, for example, if an increase in the speed of the unit occurred, then the threshold frequency of the elements 2 increases, and in this case the voltage of the logic "O at the outputs of the elements 2 is maintained only when the sensors 1 are affected by a greater number of seeds per unit time, corresponds to the normal course of the seeding process at a high speed of the unit.

The monitoring process continues until the pulse arrives from the first output of the distributor and the cycle ends there.

At the time of the violation of the controlled process, the pulses from the respective sensors to the inputs of the elements 2 either do not arrive at all, which corresponds to the blockage of the openings, or arrive at a frequency below the threshold frequency of the elements 2. In this case, the outputs of the corresponding threshold elements "1 that is being rewritten to block

memory upon receipt of the next pulse from the rotation sensor 5. Information about the violation of the monitored process from the output of memory block 3 passes through the corresponding elements AND 7 to the output of the element OR 9 when pulses from the distributor 8 arrive at the second inputs of the elements AND 7.

Logical "1 from the output of the element OR 9 is fed to the input of the element AND 13, to the controlled amplifier 24 and the recording input of the OZB 27. At the same time, the pulse of the 12 noctynaeT generator to the input of the mode switching block 26 is read, which translates the OZB 27 into the" Read and the output of OZB 27 is the information recorded in the previous test cycle. Information from the output of the PSA enters element I 13 and in the case of a repetition of the failure signal from one joint in two or more cycles at the output of the element I, an impulse is generated on the falling edge of the pulse from the generator 12 causing the trigger 15 to tilt and stop the generator 12.

Since the number of pulses arriving at the input of the ring distributor, the counters of the alarm unit and the registration counter 25 are the same, the number of the channel in which the monitored process violated, recorded twice, is displayed on the indicators 21 and 22. In this case, the light and sound signaling is switched on via controlled amplifier 24 at the moment of repeated violation of the monitored process.

If the process violation is once, then at one of the inputs of the element And 13 there is a logical "O, either from the output of the element And 9, if the violation occurs in the previous cycle, or from the output of the PSA, if the signal failed for the first time. In this case, in the pause between two pulses from the generator 12, the switching unit 26 generates a signal "Record on the control inputs of the PSA and is recorded in its corresponding cell. Failure indications do not occur and the monitoring cycle continues.

In order to identify all the sensor numbers that have detected a violation of the technological process, a manual interrogation button 18 is provided in the control unit 11, which allows displaying the number of failed seeding channels on a digital indicator. When the button 18 is pressed, the one-shot 16 is started and the trigger 15 is set to state "1, and the troubleshooting process proceeds as described.

The use of the invention will improve the performance of the unit by increasing the effective control by eliminating the indication of short-term failures.

Claims (2)

1. DEVICE FOR MONITORING THE WORK OF AGRICULTURAL UNITS by ed. St. No. 1049001, characterized in that, in order to increase the monitoring efficiency by eliminating the indication of short-term failures, it is equipped with a random-access memory and a clock counter connected to its address inputs, while the control inputs of the counter and random-access memory are connected to the output of the control unit, information the input of random access memory is connected to the output of the OR element, and the output of random access memory is connected to one of the inputs of the control unit and the signal block tion. 2. The device according to π. 1, characterized in that the control inputs of random access memory are connected to the output of the control unit through the write-read mode switching unit.