JPH01101816A - Controlling apparatus for fertilizer applicator - Google Patents

Abstract

PURPOSE:To constantly keep excellent fertilized state according to the condition of a field, by effectively interlocking a sensitivity controlling circuit with a clock circuit. CONSTITUTION:When the concentration of a fertilizer component near a clogging sensor 65 is low, the electric resistance of the clogging sensor 65 becomes high to decrease the difference between a standard potential and an output potential. In such a case, an alarm monitor such as lamp is not electrified. When the concentration of the fertilizer component is high, the electric resistance of the clogging sensor 65 becomes low, however, the output voltage to a comparator 68 is maintained at a high level within a prescribed period. An alarm is not given until the state of high fertilizer concentration caused by fertilizer clogging is continued longer than the prescribed period. When the detection of the clogging of fertilizer is difficult according to the kind of the fertilizer or condition of the field, the working sensitivity is raised by decreasing the standard potential with a sensitivity controlling resistor 70. The setting period of a CR clock circuit 72 is also prolonged by raising the sensitivity and, accordingly, it is advantageous for the prevention of alarm caused by erroneous detection. When the sensitivity is lowered, the preset period becomes short and the control accuracy is kept unchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a control device that is installed in a fertilizer applicator and controls the sensitivity of alarm monitors such as lamps and buzzers that notify of fertilizer clogging in the fertilizer applicator. .

[Conventional technology 1] As a fertilization device for paddy fields, the lower end of the eel pipe, which serves as a fertilizer supply path, is opened inside a groover that is V-shaped in plan view and forms grooves in the rice field. There is one that supplies granular fertilizer by falling. Fertilization for paddy fields like this? c2! Since fertilizer tends to clog near the exit of the eel outlet when in use, when fertilizer clogs occur, a lamp, buzzer, etc. is used to notify the operator.

The control device of the alarm monitor is equipped with a clogging sensor for detecting fertilizer clogging.The clogging sensor detects muddy water that changes when chemical components of fertilizer, such as ammonia components, dissolve in muddy water in the field. Many devices that detect conductivity are used.

[Problems to be Solved by the Invention] However, since the solubility of fertilizer changes depending on water temperature, air temperature, etc., there is a problem that detection sensitivity varies depending on water temperature and air temperature, making it difficult to perform a good fertilization operation. In addition, in order to reliably deal with fertilizer clogging, it is recommended to set the monitor operation sensitivity to changes in conductivity to be high.
Since it is activated even when 1 Iffl amount remaining from the previous fertilization operation is detected, alarms such as lamps and buzzers may be issued frequently during the operation even if no fertilizer clogging has actually occurred.

[Means for Solving the Problems] In order to solve the above problems, the present invention is configured as follows.

That is, the control device for the fertilizer application device according to the present invention detects the clogging of the fertilizer in the application section 11ff1 by detecting the change in the electrical conductivity of the fertilizer application section due to the dissolution of the chemical components of the fertilizer supplied to the paddy field. A control device for a fertilizer application device comprising a sensor and a monitor that displays an abnormality when clogging is detected by the sensor, and a clock circuit that operates to prevent the monitor from operating unless the sensor continues to detect an abnormality for a certain period of time. and a sensitivity adjustment circuit that makes the sensitivity of the clogging sensor insensitive when the solubility of the chemical component of the fertilizer in the III field is high, and conversely makes the sensitivity of the clogging sensor sensitive when the solubility is small, and the sensor is The clock circuit is characterized in that when it is made sensitive, the setting time of the clock circuit becomes long, and when it is made insensitive, the setting time is shortened.

[Function] If the fertilizer becomes clogged, it will be detected by the clog sensor after the time set in the clock circuit has elapsed, so - if the conductivity changes over time, the alarm monitor will not operate.
Further, since the sensitivity of the operation can be adjusted by the sensitivity adjustment circuit and the set time is changed in accordance with the sensitivity of the operation, it is possible to carry out 8 controls in accordance with the working conditions, and there is less erroneous sensing.

[Embodiment] FIG. 1 shows an embodiment of the present invention, and shows a riding-type fertilizing rice transplanter that tows a working unit 3 with a towing vehicle body 2. This fertilizing rice transplanter is a 6-row planting type, and the transmission case 5, which also serves as the machine frame, is equipped with 6 planting devices for the number of rows. ..., fertilizer application device 7. ..., and seedling tanks 8 divided into the number of rows are provided.

The working section 3 has a center float lO and side floats 11.
11, and slides over the field as the towing vehicle body 2 advances.

The fertilizer application device 7 includes a hopper 31, a feeding section 32, and a feeding pipe 33.
Rotational power is transmitted from the transmission case 5 of the planting section to the feeding roll 35 of the feeding section.

The feed roll 35 has a plurality of grooves (
recess)37. ... are formed at equal intervals on the groove roll 39.
and a claw roll 40 formed with claw-like protrusions 38 that are slidably engaged with the grooves 37 of the groove roll. The groove roll 39 constituting the feed roll 35 is rotatably supported by a roll support shaft 42 having a threaded portion, and four members 43 are screwed onto the threaded portion of the roll support fIil142. The claw roll 40 is rotatably attached to the y4m member 43. Further, a drive shaft 45 is fitted into the hollow portion of the roll support shaft 42 so as to be freely rotatable, and a clutch member 47 is fitted to the outer peripheral portion of the drive shaft. The clutch member 47 has a pawl 48 that engages with the pawl of the groove roll 39, and is supported in a state in which it is movable and removable in the axial direction with respect to the two-drive vehicle 45, and free rotation is restricted. By operating this clutch member, transmission of power to the guide roll 35 can be turned on and off.

An opening is formed at the lower end of the feeding portion 32, and a feeding pipe 33 is connected to this portion through a funnel 50.
52 is a brush, and 52 is a coil spring.

A pinion 55 that meshes with the gear 53 is provided below the gear 53 that is integrally formed with the ii member 43. An umbrella wheel device 58 is provided at the end of the shaft 57 to which the pinion 55 is attached, and a handle 59 for adjusting the feed stitch is provided on the drive side gear. This handle 5
The operation section 9 extends toward the front side of the m mounting table 23. When this handle 59 is turned, the adjustment member 43 is rotated due to the meshing relationship between the binion 55 and the gear 53, and the roll support shaft 4
143 of the groove roll 39.
The fitting length of the protrusion 38 of the claw a-rule 40 with respect to 7 changes,
The volume of the groove 37 changes. For this reason, the weight of the granular fertilizer carried out by the delivery roll 35 changes.
In the illustrated example, since the operating portion of the handle 59 extends to the vicinity of the front surface of the seedling stand 23, it is easy to adjust the amount of feeding in gJ.

The feed pipe 33 serves as a passage for the fertilizer supplied to the field, and is made of transparent or semi-transparent plastic, and its lower end is connected to the zero furrowing device 6 attached to the inside of the furrowing base 60.
No. 0 includes a main body portion 61 that is U-shaped in plan view and a tip end portion 62 of a strip, and a clogging sensor 65 is attached to the front wall of the main body portion 61. The clogging sensor 65 is an electrical sensor that detects a change in the electrical conductivity of the field due to dissolution of fertilizer components in muddy water in the field, and the detection result is input to the control device 2167.

FIG. 6 is a circuit diagram of the control device 67. The control device 67 has comparators 68 for the number of threads. ..., to which the reference voltage of 31 sensitive circuits 69 is loaded.

This reference voltage can be adjusted using the four sensitivity volumes 70. In addition, each clogging sensor 65. ... is the CR clock circuit 72. Each corresponding comparator 68 via...
．． ···It is connected to the. The CR clock circuit 72 is formed by combining a capacitor 73, a resistor 74, and the like. These X* main voltages and the output voltage of the clogging sensor 65 are compared by a comparator 68, and when a predetermined potential difference occurs, g
Fertilizer clogging lamp 76, which is an information monitor. ..., 77
The alarm buzzer 78 is energized. Fertilizer clogging lamp 76 provided in each fertilizer application device. ... lights up when fertilizer clogging occurs in each fertilizer applicator, and the fertilizer clogging lamp 77 and alarm buzzer 78 installed in the cockpit indicate which fertilizer is being applied. t2! It lights up or makes a sound when fertilizer clogs occur. In addition, the hopper 31 of each fertilizer application device
．． ... has a hopper switch 80 which closes the circuit when the fertilizer runs out. ... are provided, and these are connected to the buzzer 78 and the fertilizer shortage lamp 81, so that the fertilizer shortage lamp 81 lights up even if any of the hoppers 31°... runs out of fertilizer. Along with the buzzer 78
is starting to sound. In addition, buji stop small switch 8
If you enter 2, the buzzer 78 will not sound.

During work, if the concentration of fertilizer components near the clogging sensor 65 is low, the electric resistance value of the clogging sensor 65 is high, so the potential difference between the reference voltage and the output voltage becomes small, and alarm monitors such as lamps and buzzers are Not energized,
In addition, if the concentration of fertilizer components is high, the clogging sensor 65
The electrical resistance value of the comparator 68 becomes low, but the comparator 68
The output voltage to is maintained high. Therefore, when an abnormality is momentarily detected, a g-alarm is not issued, and when a clogging of the fertilizer actually occurs and the state in which the concentration of fertilizer is high continues for more than a set time, an alarm is issued for the first time.

If fertilizer clogging is difficult to detect due to the type of fertilizer or field conditions, the sensitivity of the operation can be increased by lowering the reference voltage using the sensitivity adjustment volume 70. When the sensitivity is set to 1, the setting time of the CR clock circuit 72 becomes longer, which is convenient for preventing alarms due to false detection.Also, when the sensitivity is made insensitive, the setting time becomes shorter, which reduces control accuracy. You won't be hit.

[Effect of the invention 1 As explained above, the control v4 of the fertilizer application device according to the present invention
The device is equipped with a sensitivity adjustment circuit and a blackout circuit, and as these circuits are effectively linked, it is possible to always maintain good fertilization conditions that match the field conditions, etc. It is now possible to prevent alarm monitors such as lamps and buzzers from operating due to erroneous detection, resulting in a better usability experience.

[Brief explanation of the drawing]

Figure 1 shows book 9. Side view showing the embodiment of light, Fig. 2 (
a) and (b) are a plan view and a side view of the main parts, FIGS. 3, 4 and 5 are a side view, a front sectional view and a front external view of the application device, and FIG. 6 is a control device. FIG. DESCRIPTION OF SYMBOLS 1... Fertilizer rice transplanter, 7... Fertilizer application device, 31... Hopper, 32... Feeding part, 60... Grooving machine, 65...
- Clogging sensor, 67... Control device, 69... Sensitivity adjustment circuit, 72... CR clock circuit, 76.77.
...Fertilizer clogging lamp, 78...Alarm buzzer.

Claims (1)

[Claims] (1) A clogging sensor that detects clogging of fertilizer in the fertilization area by detecting changes in the electrical conductivity of the fertilization area due to dissolution of chemical components of the fertilizer supplied to paddy fields; A control device for fertilizer application equipment that is equipped with a monitor that sometimes displays abnormalities, and a clock circuit that prevents the monitor from operating unless the sensor continues to detect an abnormality for a certain period of time, and a control device that controls the solubility of chemical components of fertilizer in the field. A sensitivity adjustment circuit is provided that makes the sensitivity of the clogging sensor insensitive when the solubility is large, and conversely makes the sensitivity of the clogging sensor sensitive when the solubility is small,
A control device for a fertilizer application apparatus, characterized in that when the sensor is made sensitive, the set time of the clock circuit becomes long, and when the sensor is made insensitive, the set time is shortened.