JP2002035662A - Chemical spray quantity control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the optimal spraying in a spray quantity control device using a chemical spraying vehicle. SOLUTION: With the start of the traveling of a moving agricultural machine, a vehicle speed from the detected information of a sensor 12 and the chemical spraying quantity per unit area corresponding to the detected vehicle speed are calculated by a prescribed equation. The set spray quantity per unit area is compared to the actual spray quantity and in the case some difference is generated, the pressure in a pressure adjusting device of a control spray apparatus is adjusted by the pressure correction instruction corresponding to the difference value to perform a correction to make the practical spray capacity coincide with the set spray capacity. In the spray pressure control process, the spray quantity is controlled so that, if the detected vehicle speed is lower then the low speed standard value, the chemical spray is stopped or continued while keeping the lowest standard spray pressure, and if the detected vehicle speed is higher than the high speed standard value, the chemical spray is stopped or continued while keeping the maximum standard pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a spray amount control device for a medicine spraying vehicle.

[0002]

2. Description of the Related Art A chemical spraying apparatus is known which controls the spraying pressure of a control spraying apparatus according to the vehicle speed of a moving agricultural machine so that the spraying rate per unit area is substantially constant.

[0003]

Problems to be Solved by the Invention A conventional medicine spraying apparatus which controls the medicine spraying pressure per unit area by controlling the medicine spraying pressure in accordance with the vehicle speed of a mobile agricultural machine, increases or decreases the vehicle speed. Accordingly, the spray pressure of the medicine spray device is adjusted to a high level or a low level according to a predetermined standard.

[0004] Therefore, when the vehicle speed is low, the minimum reference pressure required for atomizing the medicine may not be reached, and when the vehicle speed is high, the spraying amount per unit area may be less than that of the operator. There was a problem that it was not possible to properly spray the drug. Therefore, the present invention is to solve such a problem.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a medicine spraying apparatus which controls a medicine spraying amount per unit area by controlling a medicine spraying pressure or a pump discharge amount in accordance with a vehicle speed of a mobile agricultural machine. In the case of a vehicle speed at which the spraying pressure of the control spray device 5 or the discharge amount of the pump 13 is lower than a predetermined value, the spraying of the medicine is stopped or the spraying of the medicine is continued while maintaining the minimum reference pressure. In the case of a vehicle speed at which the spray pressure of the medicine is higher than a predetermined value, the spray of the medicine is stopped or the spray of the medicine is continued while the maximum reference pressure is maintained.

[0006]

When the mobile agricultural machine starts running,
Drug flow sensor (return) 28, drug flow sensor (inhalation)
18. Detection information is sent from the pressure sensor 30, the vehicle speed sensor 12 to the control unit 20, and the vehicle speed and the amount of medicine sprayed per unit area corresponding to the detected vehicle speed are calculated from the detected information by a predetermined formula. , The set application amount per unit area is compared with the actual application amount, and the difference is calculated. Next, the pressure of the pressure adjusting device 15 of the control spray device 5 is adjusted by the pressure correction command corresponding to the difference value, and the actual spraying ability is corrected so as to match the set spraying ability.

[0007] In such a spray pressure control process, it is determined whether the detected vehicle speed is lower than the low speed reference value. If the detected vehicle speed is lower than the low speed reference value, it is determined whether to stop spraying the medicine. Alternatively, control for maintaining the spraying of the medicine while maintaining the minimum reference spray pressure is performed. Also, it is determined whether the detected vehicle speed is higher than the high-speed reference value. If the detected vehicle speed is higher than the high-speed reference value, the medicine spraying is stopped or the medicine spraying is performed while maintaining a predetermined maximum reference pressure. Is continued.

As described above, in the case where the vehicle speed of the passenger management machine 1 becomes slow and does not reach the minimum reference pressure required for atomizing the medicine, the improper spraying operation such that the medicine is not atomized is stopped. Or spraying is continued while maintaining the minimum spray pressure, and if the vehicle speed is too fast to reach the specified spraying rate per unit area, stop spraying work, or Since the spraying of the medicine is continued at the predetermined maximum reference pressure, an inappropriate spraying operation of the medicine can be avoided.

[0009]

Embodiments of the present invention will be described below. The body 2 of the passenger management machine 1 has the same diameter
Rear wheels 3 and 4 are provided, and a control spray device 5 is attached to the front of the body 2. An engine 6 is mounted above the left and right front wheels 3, 3, and the engine 6 is covered with a hood 7. A seat 8 is provided above the left and right rear wheels 4, 4, and a handle 9 is disposed in front of the seat 8. Handle 9 at the rear of the bonnet 7
An instrument panel 10 is provided below. Handle 9
Is steered left and right, the left and right front and rear wheels 3 and 4 are steered simultaneously. A chemical solution tank 11 is detachably mounted around the seat 8 above the body 2.

Power is transmitted from the output shaft of the engine 6 to the front wheels 3 and the rear wheels 4 via the traveling transmission, and the vehicle speed sensor 12 detects the rotational speed of the transmission shaft of the traveling transmission to detect the vehicle speed. It is. In addition, a pump 13 for spraying a chemical solution from the output axial force of the engine 6 via the work implement transmission.
Power is transmitted to.

A lower water inlet of the chemical liquid tank 11 is connected to a pump 13 via a water absorption pipe 14, and the pump 13 is connected to a pressure regulator 15 via a pressure pipe 14. The pressure adjusting device 15 adjusts the pressure of the discharged chemical liquid, and includes a balance tank 15a, a relief valve 15b, an opening / closing cock 15
c, a return hose 15d and the like. Pressure regulator 1
The starting end side of the return pipe 16 is connected to the pressure regulating chamber 5 and a part of the chemical solution is returned to the chemical solution tank 11, and the medicine settled at the lower part of the chemical solution tank is stirred.

The chemical discharge port of the pressure regulator 15 is branched into a plurality of high pressure hoses 17, 17,..., And a chemical inflow sensor (suction) 18 serving as a flow rate detecting means is attached to a connection portion immediately before the branch. I have. High-pressure hose 17, 17, ...
Are further connected to a central boom 5a and left and right booms 5a, 5b constituting the control spray device 5 through an intermediate hose (not shown), and spray the chemical solution from spray nozzles 19, 19,.

Next, the control device for controlling the amount of sprayed medicine of the control spray device 5 will be described with reference to FIG. On the input side of the control unit 20 having a built-in CPU, a spray amount setting switch 21, a display changeover switch 22, a spray width setting switch 23 for setting the spray width of the left and right booms 5a and 5b, and a reset switch via an input interface. 24, a spray amount increase adjustment switch 25, a spray amount decrease adjustment switch 26, an automatic / manual changeover switch 27, a medicine flow rate sensor (return) 28 for detecting a medicine return flow rate, and detecting a suction amount of a medicine to the pump 13. Medicine flow sensor (inhalation) 18, pressure sensor 30 for detecting medicine ejection pressure, vehicle speed sensor 12, 4WS switch 31 for switching to four-wheel steering, FWS switch 32 for switching to front-wheel steering, left and right front wheels 3,3 Are connected to each other.

On the output side of the control unit 20, a pressure control motor 34 for controlling the ejection pressure of the medicine via an output interface, a buzzer 35, and an independent clutch driving means 36 for turning on and off an independent clutch. , An FWS lamp 37 for displaying front wheel steering travel, a 4WS lamp 38 for displaying four wheel steering travel, and a driving means 39 for a four wheel steering travel valve are connected to each other.

FIG. 4 shows the control panel 40.
The control panel 40 is provided with a display unit 41, and the display unit 4
In 1, the amount of sprayed medicine per are, the cumulative amount of sprayed medicine, and the spraying pressure of the drug solution are sequentially displayed. When the display switch 22 on the right side is pressed, these displays are sequentially switched, and the pressure display lamp 42, the unit application amount display lamp 43, and the cumulative application amount display lamp 44 provided on the left side correspond to these displays. Flash each other.

On the lower side of the display unit 41, from the left side, a spray width setting switch 45, a spray amount setting switch 21, an automatic / manual changeover switch 27, and a spray amount increasing adjustment switch 2
5. Spreading amount reduction adjustment switch 26, reset switch 2
4, and a display changeover switch 22 and a correction switch 46 are provided on the right side of the display unit 41.

Next, the spraying control of the above configuration will be described. In this control, the actual spraying amount in a predetermined area is compared with the set planned spraying amount, and the spraying pressure is corrected in accordance with the difference, thereby trying to optimize the spraying amount.

At the start of the spraying operation, the operator presses the spray width setting switch 23 to set the spray width to 8 m, for example.
Next, the spray amount setting switch 21 is pressed, and for example, 10
A medicine spraying amount of 25 l per radius is set, and the correction switch 46 is pressed. Then, 25 per 10 ares per unit area
A target spray amount of 1 is set.

When the passenger management machine 1 starts running, the medicine flow sensor (return) 28, the medicine flow sensor (inhalation) 18,
The detection information of the pressure sensor 30 and the detection information of the vehicle speed sensor 12 are respectively input to the control unit 20, and the spraying area of the medicine and the spraying amount of the medicine are sequentially calculated from the detection information by a predetermined calculation formula.

When the spraying of the medicine having a unit area of 10 R is completed, the actual spraying amount is calculated from the detection information, and then the set spraying amount per unit area is compared with the actual spraying amount. Differences are calculated. Then, FIG.
The correction pressure corresponding to the difference value is selected and determined from the correction graph shown in FIG. Next, the pressure of the pressure control device 15 is adjusted by adjusting the pressure control motor 34 according to a control command from the control unit 20, and a correction is made so that the actual spraying ability matches the set spraying ability. Therefore, after the correction, the actual spraying of the medicine corresponding to the set spraying amount is performed.

In a conventional apparatus, a unit area is divided into, for example,
If the intended spraying amount is not achieved with the unit area of 10 are or 30 are determined by the operator,
The operator himself has to adjust the pressure of the pressure regulator or operate the switch for increasing / decreasing the amount of spraying to adjust the amount of spraying, which is a cumbersome and cumbersome operation.

However, in this embodiment, as described above,
For example, if the set application target per unit area of 10 are 25 liters and the actual application amount is 28 liters, every time the medicine application per unit area is completed, the difference is 3 liters. Since the spraying pressure is automatically corrected for each of the above, there is no need for the operator to calculate the difference in the spraying amount, and even the elderly can spray the medicine appropriately.

Further, while the worker is traveling in a field part which is susceptible to pests and insects during the spraying operation, the spray amount increase adjustment switch 2
5 may be used to temporarily increase and adjust the spraying amount. However, the spraying operation may be continued while such adjustment is being performed. However, each time the spraying operation per unit area is completed, the spraying amount is increased. By performing the correction control described above, it is possible to return to the initially set spraying amount, and the spraying operation intended by the operator can be performed.

Next, another embodiment of the spraying control will be described. In this embodiment, the spraying pressure and the discharge pressure are controlled by controlling the spraying pressure of the medicine or the discharge amount of the pump in accordance with the vehicle speed to control the spray amount per unit area to be substantially constant. In the case of a vehicle speed at which the amount is lower than a predetermined value and proper spraying cannot be performed, the spraying of the medicine is stopped, or the spraying of the medicine is continued while maintaining the minimum reference pressure at which the spraying operation can be properly performed, It issues an alarm that prompts an increase in the vehicle speed, and, when the spraying pressure is higher than a predetermined value, stops the spraying of the medicine or keeps the maximum reference pressure and continues the spraying of the medicine, The warning is issued to urge the vehicle speed to decrease.

When the passenger management machine 1 starts running, the medicine flow sensor (return) 28, the medicine flow sensor (inhalation) 18,
Detection information is input to the control unit 20 from the pressure sensor 30 and the vehicle speed sensor 12, and the vehicle speed and the spray amount of the medicine per unit area corresponding to the detected vehicle speed are calculated from the detected information by a predetermined calculation formula. A pressure increase adjustment command or a decrease adjustment command is issued from the unit 20 so that the spray amount corresponds to the detected vehicle speed, and the pressure of the pressure adjusting device 15 is adjusted to a pressure corresponding to the vehicle speed.

In such a spray pressure control process, it is determined whether or not the detected vehicle speed is lower than the low speed reference value. If the detected vehicle speed is lower than the low speed reference value, the spraying of the medicine is stopped or the minimum is set. Control for maintaining the spray pressure and continuing the spraying of the medicine is performed. At this time, an alarm display is displayed on the display unit 41 to urge the vehicle speed to increase. When the detected vehicle speed is lower than the low speed reference value, vehicle speed control may be performed with the vehicle speed being the low speed reference value, and control may be performed to maintain the minimum spray pressure and continue spraying the medicine.

It is determined whether the detected vehicle speed is higher than the high-speed reference value. If the detected vehicle speed is higher than the high-speed reference value, the spraying of the medicine is stopped or the maximum reference pressure is maintained and the medicine is sprayed. Is performed, and at this time, an alarm prompting the vehicle speed to be reduced is displayed on the display unit 41. When the detected vehicle speed is higher than the high-speed reference value, control may be performed such that the vehicle speed is set to the high-speed reference vehicle speed, the maximum reference pressure is maintained, and the spraying of the medicine is continued.

As described above, when the vehicle speed of the passenger management machine 1 becomes slower than the low speed reference value and does not reach the minimum reference pressure required for atomizing the medicine, an instruction to increase the speed is issued. ,
If the vehicle speed is faster than the high-speed reference value and the spray amount per unit area does not reach the specified set spray amount, a deceleration instruction is issued, so the operator's coping method is clear and quick response is possible, The spraying operation can be performed smoothly.

In the spraying control of the control spray device 5, the spraying pressure is controlled by increasing or decreasing the pressure adjusting device 15, but before the increase or decrease adjustment output, the medicine flow rate sensor ( If the output of increase / decrease adjustment is output after the detection fluctuation widths of the return () 28 and the medicine flow sensor (inhalation) 18 become lower than the reference value, the stability of the spray amount control can be improved. FIG. 6 shows the control flow.

When starting the spraying control of the control spray device 5 when the engine 6 is started, the pressure regulating device 15 is set to a predetermined initial pressure, and then the drug flow rate sensor (return) 28 and the drug Flow sensor (inhalation) 18
After the detected fluctuation width of the pressure becomes equal to or less than the specified value, the pressure regulating device 15
When the control of the spray pressure is started by adjusting the increase / decrease of the spray amount, the stability of the spray amount control can be improved. FIG. 7 shows the control flow.

Next, another embodiment of the spraying control will be described. In this embodiment, the spray nozzle 19 of the control spray device 5 is used.
Can be changed to several types, and during the spraying operation for each type of the spray nozzle 19, the spraying is performed while increasing the spray pressure by a predetermined amount, during which the pressure sensor 30, the drug flow sensor (suction) 10, and the drug flow sensor ( (Return) 28 to detect the data, measure the relationship between the spraying pressure and the amount of sprayed medicine, and store it in the storage device.

Thus, water is actually sprayed at a fixed position while referring to the relationship between the spray pressure and the amount of sprayed medicine for each type of spray nozzle 19. During the spraying, the pressure control motor 34 is adjusted to adjust the pressure adjusting device 15, and while the spraying pressure is changed by a predetermined amount, the characteristics of the spraying pressure amount and the medicine spraying amount are sequentially measured according to the program. Then, based on the characteristics, the spraying amount of the medicine per unit time is measured each time the spraying pressure increases by a predetermined amount, and the measured amount is recorded in an electrically rewritable nonvolatile memory, and the spraying amount control of the medicine is based on this data. It is done.

Accordingly, by inputting the type of the spray nozzle 19 to the control unit 20 at the time of controlling the spray amount of the medicine,
The application amount control is performed based on the characteristic values stored in the non-volatile memory of the control unit 20, and the application amount control of the medicine can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a passenger management machine.

FIG. 2 is a side view of a main part.

FIG. 3 is a block diagram of a control device.

FIG. 4 is a front view of a main part.

FIG. 5 is a graph of pressure correction.

FIG. 6 is a flowchart.

FIG. 7 is a flowchart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Riding management machine 2 ... Body 3 ... Front wheel 4 ... Rear wheel 5 ... Control sprayer 5a ... Central boom 5b ... Left boom 5c ... Right boom 6 ... Engine 7 ... Bonnet 8 ... Seat 9 ... Handlebar 10 ... Instrument panel 11 ... Chemical solution tank 12 ... Vehicle speed sensor 13 ... Pump 14 ... Water absorption pipe 15 ... Pressure regulating device 16 ... Return pipe 17 ... High pressure hose 18 ... Chemical flow rate sensor (inhalation) 19 ... Spray nozzle 20 ... Control unit 21 ... Spray amount setting switch 22 ... Display changeover switch 23 ... Spreading width setting switch 24 ... Reset switch 25 ... Spreading amount increase adjustment switch 26 ... Spreading amount decrease adjustment switch 27 ... Automatic / manual changeover switch 28 ... Drug flow sensor (inhalation) 30 ... Pressure sensor 34 ... Pressure control motor

Claims (1)

[Claims] In a chemical spraying device of a control spraying device, a spraying amount of a medicine per unit area is controlled to be substantially constant by controlling a spraying pressure of a medicine or a discharge amount of a pump according to a vehicle speed of a mobile agricultural machine. In the case of a vehicle speed at which the spraying pressure of the spray device 5 or the discharge amount of the pump 13 is lower than a predetermined value,
Either stop spraying the medicine, or continue spraying the medicine while maintaining the minimum reference pressure.If the vehicle speed at which the spray pressure of the medicine is higher than a predetermined value, stop spraying the medicine,
Alternatively, a medicine spraying amount control device characterized in that the medicine spraying is continued while maintaining the maximum reference pressure.