The device control process of sowing fertilizers screw metering system

 

(57) Abstract:

The invention relates to the field of agricultural engineering, and in particular to devices and devices to monitor and control the process of sieving material machines with screw actuators. The technical result is to increase the uniformity of seeding and the reduction in time of setting-up, adjustment and control of the seeding rate. The device comprises a hopper with a metering valve, which is across the movement has a spiral auger enclosed in a rotary casing driven with holes. It also includes two seed sensor, control unit, display unit, actuator and control circuit actuating mechanism. When the device signals from the sensors seeding installed over the first and the last is driven by the holes, are compared, the result of the comparison, adjusts the position of the rotary casing. 5 Il.

The present invention relates to agricultural machinery, and in particular to devices and devices to control the process of sieving material machines with screw working bodies, and can also be used in other sectors x is nekby metering system [1], contained hopper dispensers, which has a spiral auger enclosed in a casing, a driven hole which is made in the form of a parallelogram, the acute angle which is the angle of rise of the helix of the screw. Holes overlap comb flap, the crests of which are arranged with a pitch equal to the pitch holes, and inclined to a casing forming an angle equal to the angle of ascent, helix screw. On the edge of the screw surface screw installed purifiers with elastic elements.

The disadvantage of this device is that for regulation, control and adjustment of the working bodies require a significant investment of time. More than half of these costs falls on the control and the adjustment of the uniformity of seeding, and this leads to poor performance of the unit. In addition, the participation of the operator in setting up the machine makes a subjective factor.

It is also known device [2], comprising a rotatable casing, inside of which is placed screw. In the lower part of the casing are driven holes are blocked by a shield. The body is placed in-feed conveyor and metering device, which is connected with the rotary casing by means of a hydraulic cylinder, working PA the ends of the casing are installed switches, included in the electrical circuit of the valve.

The disadvantage of this device is that by turning the casing cylinder is not achieved given the unevenness of application.

The closest technical solution, selected as a prototype, is the device [3], comprising a rotatable casing, consisting of movable and stationary sections, with holes, inside of which is screw. The casing is kinematically connected lever system consisting of a lever, rod and gear sector with a metering device located on the back wall, with each section together with the General longitudinal thrust, one end of which is fixed on the stationary peripheral section.

The disadvantage of this device is that the control and uniformity of fertilizer requires considerable time, as well as reduced performance due to periodic stops to adjust seeding rates.

The invention solves the problem of increasing the difference between the actual and perform the adjustment and control of the seeding directly during operation of the screw machine.

To achieve this, the technical result in the well-known Stroitelny in the rotary casing driven with holes, includes two sensor seeding fertilizer, the control unit, the actuator and the display unit, and the first seed sensor is located below the first driven hole and connected to the first input of the control unit, the second seed sensor fertilizers is located beneath the latter is driven by the hole and connected to the second input of the control unit, to the first output of which is connected to the display unit, and the second output through the control circuit actuating mechanism associated with the actuator, which is rigidly attached to the frame of the sowing machine bolts and kinematically connected with one end of the rotary casing.

The claimed technical solution is illustrated by drawings.

In Fig. 1 presents a General view of the screw of the seed distributor.

In Fig. 2 depicts a functional diagram of the control device.

In Fig. 3 - section a-a in Fig. 1.

In Fig. 4 is a view along arrow b of Fig. 1.

In Fig. 5 is a diagram of the control unit.

The device control process of sowing fertilizers screw metering system comprises a hopper 1 with a metering valve, which is across the movement has a spiral auger 2, enclosed in a rotary Komi Windows 4, which are connected respectively to first and second inputs of the control unit 7, the actuator 8 and the display unit 9, and the actuator 8 through the control circuit actuating mechanism 10 is connected to the second output of the control unit 7 and is rigidly attached to the frame 11 of the sowing machine bolts 12.

The actuator 8 is a reducer, worm wheel which is kinematically connected to one end of the swivel casing 3, and a worm shaft of the stepping motor, which is rigidly fixed on the frame 11 of the sowing apparatus by bolts 12. The display unit 9 contains two LEDs, one of which indicates the inclusion of device management, the other on violation of conditions of sowing fertilizer. As the control circuit 10 actuator selected a model reverse stepper motor.

The control unit 7 includes an integrated circuit 13 of the type TO 1816 BE 48, analog-to-digital Converter 14 To 572 THP and the chip output 15 of the type TO 580 VA. Conclusions (DA1, DA2) 16,17 chip 14 are connected respectively to the sensors 5, 6 seeding fertilizer. Conclusions (PA0...PA7) 18, 19, 20, 21, 22, 23, 24, 25 chip 14 are connected respectively to output the respectively with pins 39, 40, 41, 42, 43 of the chip 13 and (RD) 44.

Conclusions ( ALE) 45 chip 13 is connected to the pins 46 and 47 of the chip 14.

Conclusions (INT) 48 chip 13 is connected through the "reset" button 49, ( VCC) 50, 51, (VD) 52 is connected through the start button 53 to the power supply 15V.

Conclusions (XTAL1)54 and (XTAL2)55 connected to the quartz resonator (BQ)56, and they, in turn, through the capacitors (C1)57, (C2)58, and the input 59 via a capacitor (C3)60 and conclusions (Vss)61 is connected to "earth".

The leads of the chips 13 (P20P21P22P23P24) 62, 63, 64, 65, 66 attached respectively to the pins 67, 68, 69, 70, 71 chip 15, the conclusions 72, 73, 74 which are connected with the terminals of the unit, the display 9. Conclusions 75, 76 chip 15 is connected to the control circuit 10 to the Executive mechanism. Conclusion 77 chip 15 is connected to power supply +5 V, and the output 78 of the chip 15 is connected to "earth".

The device operates as follows.

When turning on the device button ("start") 53, the control unit 7 tests the display unit 9, i.e., includes LEDs of the display unit 9, and after some time disables them, so that the machine operator can ensure that the display unit 9 and the output 62 ptx2">

When moving the machine across the field, sowing the material passes through the driven window 4 swivel casing 3 and gets on the sensors 5 and 6 seeding fertilizer. The control unit 7 polls the sensors 5 and 6 seed.

The survey is done the following way: chip 13 on the conclusions 39, 40, 41, 42 generates a signal on the survey of the first sensor 5 seed, which is connected to the output 16 analog-to-digital Converter 14. After the conclusion 38 analog-to-digital Converter, a signal is generated on the end of conversion signal in digital form, the chip 13 reads the signal q1from the sensor 5 and puts it into the first memory cell. The conclusions 39, 40, 41, 42 chip 13, a signal is generated on a survey of sensor 6 seed, is connected to the output 17 analog-to-digital Converter 14. Next on output 38 analog-to-digital Converter 14, a signal is generated on the end of conversion signal in digital form q2which is read by the IC chip 13 and is placed in the second memory cell.

Next is the calculation of the difference signals

q = (q1-q2)

If q does not exceed the maximum allowable deviation value [] , repeated polling of the sensors 5 and 6 seeding fertilizer. About the>/P>When the difference signal q exceeds the maximum permissible deviation [] is, repeated polling of the sensors 5 and 6. If during this time the difference of q exceeds the maximum allowable deviation [] , that is determined by the sign of this difference.

If the difference q is positive, then the control unit 7 generates a signal at the output 65 of the chips 13 to activate the actuator 8 through the control circuit 10 actuator to rotate the casing 3 clockwise and at the same time on the display unit 9 led lights up, indicating that the violation of the seed.

There is a further survey of the sensors 5 and 6 is similar to the sequence. If after adjustment, the difference in the readings of q does not exceed the maximum permissible deviation [] , produces the following survey sensors 5 and 6 seed.

If the difference in the readings of q is negative, then the control unit 7 generates the output 66 of the chip 13 a switch-on signal of the actuator 8 through the control circuit 10 actuator to rotate the casing 3 counterclockwise and simultaneously on the display unit 9 led lights up, indicating that the violation of the seed.

Adjust proizvedenii information.

1. A. S. USSR N 1375163, 1986 MCI5A 01 G15/00

2. A. S. USSR N 1423030, 1987 MCI5A 01 G15/00

3. A. S. USSR N 1501949, 1987 MCI5A 01 G15/00

4. Horsetail C., and other Microprocessors and microcomputers in automatic control systems: a Handbook-L.: engineering, 1987. - 640 S.

5. Chip DAC and ADC: Operations, parameters, application): Energoatomizdat, 1990 - 320 C.

6. Microelectronical for automation systems (technical Handbook). Ed. by E. A. Lodochnikova, Y. M. uverova-M.: "Energy", 1969. - 272 S.

The device control process of sowing fertilizers screw metering system containing hopper with metering valve in which across the movement has a spiral auger enclosed in a rotary casing with a driven hole, wherein one end of the rotary casing kinematically connected with the actuating mechanism through a control circuit connected to the second output of the control unit, to the first output of which is connected to the display unit, and the first and second inputs of the control unit are connected with sensors seeding, located respectively below the first and the last is driven by the holes.

 

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