SU363856A1 - DEVICE FOR MEASURING THE DEPTH OF SOIL TREATMENT - Google Patents

Description

one

The invention relates to devices for determining the quality of tillage by soil tillage implements.

Devices for measuring the depth of tillage are known, including a depth sensor, a trigger pulse generator, a transducer that converts a voltage proportional to the depth of a tillage to the number of pulses proportional to the depth, a count of trigger pulses.

The plowing depth sensor continuously supplies a voltage proportional to the depth of the furrow to the comparator device of the transducer. The triggering pulse from the generator of triggering pulses is fed to the input of the converter trigger “on the counter of triggering pulses. The converter converts the voltage proportional to the depth of the tillage and coming from the depth sensor to the number of pulses proportional to the depth. These pulses are fed to a summing counter. The average depth of processing will be equal to the indication of the totalizer divided by the counter of trigger pulses.

However, the known devices do not allow directly determining in the field on which part of the cultivated area the depth of plowing does not satisfy the agrotechnical requirements, i.e. it does not allow assessing the quality of the outburst, one of the important indicators of which is compliance with the specified depth. In order to improve the measurement accuracy in the proposed device, the output of the trigger pulse generator is connected to two selectors, one input of which is directly connected to the depth sensor, and the output through a variable resistance and amplifier is connected to the counter of the number of measurements at which the depth of the boost is greater than the specified one, the input of the other is connected to the depth sensor via an inverter and a variable resistance, and the output through the amplifier is connected to the counter of the number of measurements at which the plowing depth is less than the specified .

The drawing shows a block diagram of the proposed device.

A device for measuring the depth of tillage by an arable unit consists of a depth sensor 1, a generator of 2 trigger pulses, a counter of 3 trigger pulses, a converter 4, a summing counter 5, an inverter 6, selectors 7 and 8, amplifiers 9 and W, a counter 11 of the number of measurements, the depth of plowing is less than the predetermined, counter 12, the number of measurements at which the depth of plowing is greater than the predetermined, variable resistances Ri "Rz. After switching on the device, the plow depth sensor continuously supplies a voltage proportional to the depth pa The notes on the comparator transducer to the selector 8 and through variable resistor Ri, the inverter.

A variable resistance Ri is set to the level of operation of the inverter, and this level is set equal to the lower limit of the tolerance on the measured depth. If the voltage proportional to the tillage input to the inverter input is greater than the inverter trigger level, then the output of the last signal does not appear, if the voltage at the inverter input is less than the inverter trigger level, then a signal appears at the inverter output.

Variable resistance 2 sets the response level of amplifier 10, corresponding to the upper tolerance limit on the measured depth. If the voltage proportional to the plowing depth, which is fed to the input of this amplifier, is higher than the response level, then the counter 12 is triggered.

When a trigger pulse is applied from generator 2 to the converter trigger, the latter issues to the summing counter 5 a number of pulses proportional to the measured depth. In addition, the trigger pulse goes to the selectors “opens them. As soon as the selectors are opened, a signal from the inverter arrives at the input of amplifier 9, and the input of amplifier 10 through the resistance Rz receives a signal from the depth sensor.

If the plowing depth satisfies the agrotechnical requirements, then a voltage higher than the inverter response level arrives at the inverter input, so the output of the inverter does not have a signal and the amplifier 9 does not work, the counter 11 does not work, which counts the number of measurements at which the plowing depth less given.

Since the input of the amplifier 10 also receives a voltage lower than the level of its operation, the amplifier does not work; the counter 12 does not work either, counting the number of measurements at which the depth of the flash is greater than the specified one.

If the plowing depth is less than the depth corresponding to the lower tolerance limit, a voltage lower than that of the inverter arrives at the inverter input, and a signal appears at the inverter output. When a triggering pulse arrives at the selectors, the selector 7 passes the signal from the inverter to the amplifier 9, which is triggered; the counter // also operates, and counter 12 does not, since the voltage supplied through the selector 8 is less than the response level of amplifier 10.

Similarly, if the plowing depth at the time of reference is greater than the depth corresponding to

upper tolerance limit, then it works

The total treated area can be determined by the formula F-Lb,

where L is the useful path traveled by the unit; b - the width of the unit.

If measurements are made through equal lengths of the path, then we can write that

L;: / - / z,

where / is the length of the path through which measurements are made; n - the total number of measurements.

Then the area will be expressed by the dependence:.

Similarly, the area of marriage can be expressed by dependence

FJ: / 6th, -f 1y,

where FI is the area of marriage;

1 - the number of measurements at which

Depth depth less than specified; nz is the number of measurements at which the depth of plowing is greater than the specified one.

To determine which part of the cultivated area the plowing depth does not satisfy the agrotechnical requirements, it is necessary to divide the scrap by the total cultivated area or the sum of the readings of the counter 11, counting the number of measurements at which the plowing depth is less than the specified one, and counter 12, counting the number of measurements at which plowing depth is greater than the set, divided by the total number of measurements, counted by the counter 3.

Subject invention

A device for measuring the depth of tillage by an arable unit, which contains a depth sensor, a trigger pulse generator, a transducer that converts a voltage proportional to the depth of a tillage into a number of pulses proportional to the depth, a trigger pulse counter and a sum counter, which, in order to improve the accuracy of measurements, the output of the generator of trigger pulses is connected to two selectors, the input of one of which is directly connected to the depth sensor, and the output through an alternating ivlenie and an amplifier connected to the counter number of measurements in which the predetermined plowing depth is larger, the other input is connected to the depth of the sensor through an inverter and variable

resistance, and the output through the amplifier is connected to the counter of the number of measurements at which the depth of plowing is less than the specified one.

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