SU1237115A1 - Arrangement for controlling working member of grain combine harvester - Google Patents

Description

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FIELD OF THE INVENTION The invention relates to agricultural machinery, namely, devices for controlling the working bodies of a combine harvester.

The purpose of the invention is to increase the reliability, accuracy and reliability of control over overloads or faults of the working bodies of the combine harvester.

The drawing shows a block diagram of the device.

The rotational speed sensor 1 is installed at the drive ball of the controlled working body (not shown in the drawing) and is connected to the shaping amplifier 2 of the information processing unit 3. The output of the amplifier-formatter 2 is connected to the first input of a skid 4 of the high code. The first input of the code analyzer 5 is connected to the output of the code generation stage 4, and the second input is connected to the output of the threshold setter 6. The first input of the trigger 7 is connected to the output of the analyzer 5 code, and the second through the shaper 8 of the reset signal to the output of the amplifier shaper 2. The first input of memory element 9 is connected to the output of the trigger 7 and the second input to the output of the amplifier shaper 2. The output of the memory element 9 is connected to the input of the selector 10. The output of the selector 10 through the output stage 11 is connected to the corresponding alarm element 12.

The generator 13 of the information processing unit 3 is connected to the second input of the cascade 4 to generate the code of all channels and through differential (the relativizer 14 to the third input of the memory element 9 of all channels. The blocking circuit 15 is connected to the output of the first channel selector 10 and to the fourth input of the element 9 memory remaining channels.

The writing of information processing unit 3 is carried out from the on-board network of the combine through the secondary power supply 16.

The number of channels may be n - according to the number of controlled working bodies (for a Don-1500 combine, for example, the number of channels is eight).

The device works a trace in a great way.

Amplifier driver 2 amplifies the signal from the rotational speed sensor 1 and generates pulses suitable for encoding.

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A cascade 4 of generation of a code evaluates the frequency coming from the sensor 1 of the rotational speed and the exemplary frequency coming from the generator 13 and ejects the corresponding code.

Threshold adjuster 6 allows you to set a threshold frequency code for each channel, which makes it possible to monitor the operation of the combine in different modes.

The code analyzer 5 compares the code of the input signal frequency and the code set by the threshold setter 6.

If the frequency of the input signal is higher than the threshold, then there is no pulse code at the output of the analyzer 5, the alarm element 11 does not light up, which indicates normal operation of the harvester working body controlled by this control channel.

If the frequency of the input signal is lower than the threshold, which causes slowing down or termination of the rotation of the drive shaft of the working element, then at the output of the code analyzer 5 a pulse is formed that sets the trigger 7 into one state.

The fact of the presence of this state is recorded in the memory element 9, which is clocked by the pulses of the amplifier —former 2 and retains the information on the ratio of the frequency codes until the end of the next comparison cycle.

This information, through the selector 10 and the output stage 11, is fed to the alarm element 12, whose ignition indicates that the frequency received from the rotational speed sensor 1 is a trigger of a predetermined threshold. The first channel of the unit controls the frequency of rotation of the motor shaft. If the frequency of rotation of the engine shaft is below the threshold, this automatically causes a decrease in the frequencies of other working bodies and the possible ignition of the control panel of the signal lamps.

To prevent this, the first channel is dominant, and if the input signal frequency is below the threshold one, the output from the selector 10 of the first channel through the blocking circuit 15 receives a signal to the inputs of the memory elements 9 and the rest 3

channels and blocks their receipt of new information.

This ensures the accuracy and reliability of the control. The reliability of the control is also ensured by the reliability of the device itself, assembled on elements that are highly reliable to mechanical

IMC is very small.

(1.5 W) power consumption.

The impulses from the throw, needed to bring the trigger 7 to the zero state, are outputted by the shaper 8 of the reset signal according to the signals of the amplifier-shaper 2.

The invention allows for an order of magnitude increase in the accuracy of the control being conducted and signals a decrease in frequency by 0.1-0.2% below the threshold to be set.

From oscillator 13, differentiated signals differentiated by 14 are fed to the outputs of memory elements 9 of all channels for signaling in case of an unexpected signal loss, which also ensures the reliability of control.

The source 16 of the secondary power supply of the device is connected to the onboard

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the power supply network of the combine and feeds the information processing unit with a stabilized voltage, which ensures the normal operation of the unit, which does not depend on voltage variations of the onboard network. At the input of the secondary power supply 16, a diode (not shown in the drawing) protects the unit from inadvertently applying reverse-polarity voltage. The onboard power supply of the combine is protected from alternating voltage of the converter by a filter.

Timely detection by the combiner of changes in the operating mode of the working bodies prevents their clogging with the grain mass and in some cases serious breakdowns.

Thus, the proposed device will improve the performance of the combine due to reliable, accurate and reliable control of the working bodies, as well as expand the ability to control the operation of the combine in different modes due to the set trigger threshold. As a result, the time needed for harvesting is reduced, as well as the loss of grain due to shattering.

VNISHI Order 3213/2

Random polygons pr-tie, Uzhgorod, st. Project, 4

Circulation 679

Subscription

Claims (2)

1. DEVICE FOR CONTROL OF THE WORKING BODIES OF THE GRAIN HARVESTER, containing speed sensors of the drive shafts of the working bodies, alarm elements and an information processing unit with i-channels of control, where η is the number of controlled working bodies, each of which contains an amplifier-shaper, characterized in that that, in order to increase the reliability and reliability of monitoring overloads or malfunctions of the working bodies, the cascade of code generation connected to the amplifier framing device, code analyzer, trigger, memory element * selector and output stage connected to the alarm element, as well as a threshold adjuster connected to the code analyzer, while the driver amplifier is connected to the memory element and, via the reset signal conditioner, to the trigger, in addition , the information processing unit contains a secondary power source, a generator connected to cascades of code generation of all channels and by means of a differentiator with memory elements of all channels, and the selector of the first channel through The lock chain is associated with the memory elements of the remaining channels. 2. The device according to claim 1, characterized in that the secondary power source contains a voltage to AC converter, a rectifier with a filter, current and voltage stabilizers. SU ,,, 1237115