JPH0249506A - Control device of amount of fertilizer in fertilizing machine - Google Patents

Abstract

PURPOSE:To suitably fertilize independent of slip of fertilizing machine by calculating objective rotation number of output shaft in the fertilizing machine according to set value of setting device of amount of fertilizer, etc., and detected value in detector of real car speed and controlling infinitely variable gear in fertilizer feeding device. CONSTITUTION:An infinitely variable gear is constructed with driving split pulley 6, inverted pulley 7 and V-belt hang on said pulleys and sprocket of fertilizing pump 1 is driven by sprocket of shaft 7a of the pulley 7 through chain. Each setting value is inputted into microcomputer 37 by setting device of amount of fertilizer 39, indicator of brand of fertilizer 40 and setting device of specification between stripes 41, detected value of detector of real car speed 36 is inputted and objective rotation number of the fertilizing pump 1 is calculated, thus the infinitely variable gear is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a fertilizer application amount control device for a fertilizer applicator that applies liquid fertilizer, granular fertilizer, etc. to a field.

(B) Prior Art Conventionally, fertilizer applicators have been known that do not measure the actual vehicle speed of the fertilizer applicator, but instead detect the rotational speed of the drive shaft, and control the amount of fertilizer applied accordingly.

(c) Problems to be Solved by the Invention In general, the vehicle speed detected by the drive shaft does not match the actual vehicle speed due to slipping during driving, so the known fertilizer application machine cannot perform accurate fertilizer application control.

(D) Means for Solving the Problems The present invention provides a fertilizer applicator having a fertilizer applicator, a fertilizer tank, and a delivery device for supplying the fertilizer in the fertilizer tank to the fertilizer applicator. A detection device is installed, the delivery device is driven via a continuously variable transmission, and the setting section is provided with a fertilizer amount setting device, a fertilizer brand setting device, and a row spacing setting device, and the setting values of these setting devices and the actual vehicle are A microcomputer calculates the target rotation speed of the output shaft of the fertilizer application machine based on the detected value in the speed detection device,
The aforementioned problem was solved by controlling the continuously variable transmission device using this calculated value to reduce the difference between the calculated value and the number of output shaft rotations.

(E) The operating drive shaft rotates the output shaft of the delivery device via a continuously variable transmission. Then, the amount of fertilizer applied per unit area is set using the fertilizer amount setting device, the brand of fertilizer is specified, and the row spacing specifications are set based on the width of fertilization by one delivery device, and these setting values are input into the microcomputer. Calculated.

On the other hand, the detection values of the rotation speed detectors attached to the human power shaft and output shaft of the continuously variable transmission, and the detection values of the actual vehicle speed detector attached to the fertilizer applicator are also input to the microcomputer and the output shaft of the fertilizer applicator is input to the microcomputer. A target rotational speed is calculated, and a control signal generated by the calculation operates a continuously variable transmission device to perform fertilization control suitable for each of the above-mentioned elements.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. L is a fertilization pump attached to a machine frame 2, and the machine frame 2 is connected to a tow vehicle by a top link 3 and left and right lower links 4, e.g. , is connected to a tractor, and the tow vehicle's PTO is attached to the front of it.
Transmission case 5 (or electric motor) driven by a shaft
The continuously variable transmission consists of a driving split pulley 6, a driven split pulley 7, and a V-belt 8 hooked around them, and the sprocket 6b of the input shaft 6a of the driving split pulley 6 is attached to the transmission case 5. The sprocket 5a of the output shaft of the driven split pulley 7 (output shaft) 7a drives the sprocket of the fertilization pump 1 via the cheno 10.

11 is a fertilizer tank mounted on the machine frame 2, a suction hose 12 connected to its discharge port is connected to the suction port of the fertilization pump 1, and a plurality of hoses 13 are connected to the discharge port of the fertilization pump 1. are connected to a plurality of fertilization pipes 15 attached to the lower part of the front side of the machine frame 2, and in front of the fertilization pipes 15, a pair of left and right coulters 16 are pivotally supported by brackets 17, and A grounding wheel 30 having a large number of spikes on the outer periphery and also serving as a roller is pivotally supported at the lower part near the rear. However, when the grounding wheel 30 is pivotally supported at the lower part of the front side of the machine frame 2, the roller 18 is pivotally supported at the position of the grounding wheel 30.

The seeding device 20 is composed of a groove cutting disk 19, a seeding section 21, a soil covering ring 22, a pressure roller 23, and a seed tank 24, and the inlet brocket 25 of the seeding section 21 has a chino 26, a deceleration mechanism 27, and a chino 26a. A grounding ring 30 is driven by a sprocket 28 attached to the shaft 7a of the driven split pulley 7 via a sprocket 28, and a grounding ring 30 having a large number of long spikes on the outer periphery is located at the rear lower part (or front lower part) of the machine frame 2. is supported by a shaft.

Further, a rotation sensor 3 is attached to the shaft 6a of the drive split pulley 6.
1, a rotation sensor 32 is attached to the shaft 7a of the driven split pulley 7, and the cam 33 attached to the movable pulley of the driven split pulley 7 is rotated by the control motor 34 to forcibly expand or contract the groove width. An angle sensor 35 is attached to the cam 33, and an actual vehicle speed detector 36 consisting of a rotation sensor is attached to the ground wheel 30. The detected values of the speed detector 36 and the like are input to the microcomputer 37.

Furthermore, the operation panel 38 includes a fertilizer amount (nitrogen amount) setting dial 39 and a fertilizer brand (nitrogen content) selection dial 40.
and row spacing specifications (delivery device (fertilization pump 1 in this example)
)) A selection dial 41, an alarm buzzer 42, and an alarm lamp 43 are provided, and the setting values of each setting dial are input to the microcomputer 37 as shown in FIG.
As shown in FIG. 3, the number of revolutions of the input shaft 6a, the number of revolutions of the output shaft 7a, and the actual vehicle speed of the continuously variable transmission are determined from the respective input values.
It is calculated as shown in the figure. As mentioned above, when the amount of fertilizer applied and the brand of fertilizer are selected based on the amount of nitrogen, the operation can be easily performed even when different types of fertilizers are used.

Next, calculation of the target rotation speed of the output shaft 7a of the continuously variable transmission will be explained.

First, the amount of fertilizer QT for 10 ares (100 m2) is calculated from the setting value of the fertilizer amount setting dial 39 and the setting value of the select dial 40. Next, the time (minutes) T required to work 10 ares is calculated between the rows. It is calculated from the specification selection dial 41 and the detected value of the actual vehicle speed detector 36. As a result, the amount of fertilizer applied per unit time (required discharge amount) is QR=QT/T
(Kg/m1n).

Here, if the pump performance characteristics draw a curve as shown in Figure 5, this curve can be defined as Q<Ql, Q1≦Q<Q<Q2,
Divide into the ranges of Q2≦Q<Q3 and Q3≦Q, form linear equations for each, and find constants Kl...K4, A1...A4 in advance. Select K and A corresponding to each formula from the QR calculated earlier, and set the pump target rotation speed N, N=
Obtained by (QRA)/. Note that using the calculation method as described above improves the calculation speed and makes it possible to increase the control response speed.

Select K and A corresponding to each formula from the QR calculated earlier, and set the target rotation speed N of the fertilization pump as N = (Q
It is determined by R-A)/. Therefore, the output shaft rotation speed NT of the continuously variable transmission is obtained by NT(Z2/Zl)XN.

This is input to the control motor 34 to control the increase/deceleration of the continuously variable transmission. However, Zl is the number of teeth of the sprocket of the output shaft 7, and z2 is the number of teeth of the input sprocket of the fertilization pump 1.

When controlling the amount of fertilizer applied by the control motor 34, NT and N0I
The speed is increased or decelerated so that the difference in JT is less than or equal to the dead band α.

By controlling in this way, even if the fertilizer applicator slips unevenly while traveling, it is possible to apply fertilizer uniformly.

FIG. 6 does not show the control of the alarm device, and when the control motor 34 does not operate even though the microcomputer 37 has issued an operation command (speed increase or deceleration),
A warning is issued because the transmission is defective or the continuously variable transmission capability is exceeded.

For example, the cam 33 when the control motor 34 starts operating.
The detected value DP of the angle sensor 35 is taken as the detection data DS at the start of operation, and the angle data DP and DS are compared after a certain period of time has elapsed since the start of the operation.If the difference S is 0, it means that the cam is not operating. Since this is not the case, it is considered abnormal.

And at this time, DP is not the limit value on the deceleration side,
If this is not the case on the speed increasing side, it is assumed that there is a failure somewhere, and the warning buzzer and lamp are activated intermittently. Conversely, when DP is at the deceleration side limit value m or the speed increase side limit value n, it means that the continuously variable transmission cannot correspond to the target rotation speed of the output shaft. This means that there is an abnormal pickpocketing. At this time, the intermittent alarm is further intermittent to notify the operator that continuously variable speed cannot be supported.

FIG. 7 shows the control of the control motor 34. When the manual shaft of the fertilization pump l (the driven shaft 7a in this embodiment) is not substantially rotating, for example, the input shaft rotation speed of the continuously variable transmission is The control motor 3
4 stops. Furthermore, the vehicle stops even if the vehicle speed V is less than the set vehicle speed v1.

Therefore, when the main clutch is disengaged during work, the input shaft stops, the control motor 34 stops, and the continuously variable transmission remains as it is, and when the main clutch is engaged next time, the rotational speed will be adjusted to the appropriate speed in a short period of time. Become. In addition, plowing marks may have a V-shaped groove at the boundary between reciprocating motions, and if the grounding wheel 30 fits into the groove, or when the aircraft is turned, the grounding wheel 30 will not rotate, and as a result, the detection Since the actual vehicle speed rapidly decreases and the control motor 34 stops, the delivery amount does not go out of order.

FIG. 8 shows the installation of the seeding device 20. The seeding frame 46 is connected to the rear part of the machine frame 2 by a parallel link 47 so that it can be raised and lowered, and it can be used separately from the fertilization device to handle irregularities in the field. It can move up and down to sow seeds at the appropriate depth.

In addition, the roller 18, the groove cutting disk 19, and the pressing roller 2
3 can be individually adjusted up and down and tightened with screws, so the seeding depth can be easily changed. Furthermore, since the roller bracket 18a serves as an upper limit stopper for the seeding frame 46, damage to the seeding device 20 can be prevented, and the chain tension 48 hanging down from the rear of the machine frame 2 holds the middle part of the chain 26. , it is possible to prevent the cinchona from sagging when adjusting the elevation of the seeding device 20. As shown in FIG.
It is also fastened so that it can be raised and lowered.

9 and 10 show another embodiment of the actual vehicle speed detection device, in which a transmission case 50 is attached to the lower part of the machine frame 2, and a shaft 51 supported at the lower part extends to both sides. , a pair of left and right grounding wheels 30 are attached to the extending portions thereof via one-way clutches 52, and a gear 53 spline-fitted to the center of the shaft 51 is attached to the detection shaft 55 via an intermediate gear 54.
, and the actual vehicle speed detector 36 is attached to the detection shaft 55. If there are footprints, wheel marks, etc. in the field, one of the ground wheels 30 will enter the recess and slip. As a result, even if the grounding wheel 30 stops or the rotation speed decreases, it will be detected if the other grounding wheel is rotating normally, and it will not be detected if both grounding wheels 30 stop or slip.

(G) Effects of the Invention As described above, the present invention provides a fertilizer applicator having a fertilizer applicator, a fertilizer tank 11, and a delivery device for supplying the fertilizer in the fertilizer tank 11 to the fertilizer applicator. Equipped with a speed detection device, the delivery device is driven via a continuously variable transmission,
The setting section is provided with a fertilizer amount setting device, a fertilizer brand setting device, and a row spacing setting device, and the target rotation speed of the output shaft of the fertilizer applicator is set by a microcomputer based on the setting values of these setting devices and the value detected by the actual vehicle speed detection device. 37, and the continuously variable transmission is controlled using this calculated value to reduce the difference between the calculated value and the number of output shaft rotations, so it is suitable for the amount of fertilizer applied, brand of fertilizer, row spacing, etc. At the same time, even if the fertilizer applicator slips, it is possible to easily apply appropriate fertilizer regardless of the slippage.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of a fertilizing and seeding machine, Fig. 2 is a control system diagram, Fig. 3 is a control motor control flowchart, and Fig. 4 is a stepless control system diagram. Control flowchart of the transmission, Fig. 5 is a pump discharge amount calculation diagram, Fig. 6 is an alarm control flowchart, Fig. 7 is a control motor stop control flowchart, Fig. 8 (a)
9 is a side view showing the attachment of the seeding device, (b) is a side view of the tensioner, and FIG. 9 is a longitudinal sectional view of the actual vehicle speed detection device.
FIG. 10 is an arrangement diagram of the same as above. 1. Fertilizer pump, 2. Machine frame, 6. Drive split pulley.
, 7... Driven split pulley, 15... Fertilizer pipe, 31.32
... Rotation sensor, 34. Control motor, 35. Angle sensor, 36. Actual vehicle speed detector, 37. Microcomputer, 39. Fertilizer amount setting dial, 40. Fertilizer brand selection dial, 41. Article Specification selection dial procedure amendment book illusion December 6, 1988 8\Sou

Claims (1)

[Claims] In a fertilizer applicator having a fertilizer applicator, a fertilizer tank 11, and a delivery device for supplying the fertilizer in the fertilizer tank 11 to the fertilizer applicator, the fertilizer applicator is equipped with an actual vehicle speed detection device, and the delivery device is configured to have a continuously variable speed. The setting unit is provided with a fertilizer amount setting device, a fertilizer brand setting device, and a row spacing setting device, and the setting value of the fertilizer application device is determined by the setting values of these setting devices and the value detected by the actual vehicle speed detection device. A target rotational speed of the output shaft is calculated by a microcomputer 37, and the continuously variable transmission is controlled by this calculated value to reduce the difference between the calculated value and the number of revolutions of the output shaft. Fertilizer amount control device.