JPS61225416A - Apparatus for controlling scattering amount of liquid scattering vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a spray amount control device for a liquid spray vehicle.

(Prior Art) Conventionally, as a liquid spraying vehicle for spraying water and anti-freeze spray on roads, #Komei No. 59-51866 Publication #1 Japanese Patent Application Publication No. 1989-57-
The one described in Japanese Patent No. 194068 and the like is known.

These liquid spraying vehicles are configured to control the driving means of the liquid spraying pump so that the amount of spraying per unit area becomes uniform in synchronization with the vehicle speed.

By the way, generally speaking, a pump is in a region C or below where the discharge amount increases in proportion to the increase in the rotational speed of the driving means.
The characteristic is that there is a region (referred to as LJT saturation range) in which the discharge amount does not increase proportionally despite an increase in the rotation speed of the driving means, and the rotation speed and the discharge amount are not always proportional.

Therefore, when a pump is used for a liquid spray vehicle, there is a drawback that the pump reaches a saturation region during high-speed running, and the intended spray amount cannot be obtained.

Moreover, if the spray pot and cloth are set to be thick while driving at high speeds, this tendency will become even more pronounced due to an increase in piping resistance.

(Problems to be solved by the present invention) The great invention was made in view of the above points, and it is possible to reduce the amount of spray per unit area to the value intended by the operator even when traveling at high speed. An object of the present invention is to provide a soy sauce control device for a liquid spraying vehicle that can be controlled in a balanced manner.

(Means for Solving the Problem) The great invention is to correct the discharge amount of the liquid spray pump set by the vehicle speed detection means using the line width signal and the maximum signal to obtain the corrected command value. It is configured to control the residue control means.

(Example) In Fig. 1, l is a liquid spraying vehicle that sprays water, antifreeze, etc. on the road, and on its chassis 2 is a vehicle.

A liquid tank 4 is mounted behind the driver's seat 3.

The culture medium in the liquid tank 4 is sprayed by a liquid spray pump 5, which is connected to a driving engine 6, a power extraction position (flywheel PT)
O) 7. It is configured to be driven by a drive means 9 whose discharge amount can be controlled by a discharge amount control device 8, as will be described later.

Also, the liquid tank 4 is separated by Ml! The chamber is divided into a plurality of chambers via 4a, and each chamber is equipped with multiple water level detectors 1o...fist to detect the water level.

Further, 1 rotation speed detectors 11 and 12 are provided to detect the rotation speeds of the driving engine 6 and the liquid spray pump 5, and take in the rotation speed signals as a vehicle speed signal 1 operation signal.

On the other hand, an operation unit 13 is arranged inside the driver's seat 3.
As will be described later, various operation switches are provided, and the operation of the operation switches can be outputted as an operation signal.

Incidentally, a display device 14 is provided integrally with or in close proximity to the operation section 13, and has various kinds of no.≦illustration lamps arranged thereon.

Then, each j! from the aforementioned operation section 13 is displayed. A vibration signal, a water level signal from the water level detector 10 . . . , a rotation speed detector 11 .
The vehicle speed signal and operation signal from 12 are input to a control device 15 disposed at the driver's seat 3 or at an appropriate position behind the driver's seat 3, and the control device 15 performs arithmetic processing based on these various signals. After that, a control signal is sent to the discharge amount control device W8.

Further, they are configured to supply display signals to the display device 14, respectively.

Further, to explain the liquid spray piping system and the driving means with reference to FIG. 2, a suction pipe 17 equipped with a three-way cock 16 is connected to the suction side of the liquid liquid pump 5 from the front lower part of the liquid tank 4. Further, a liquid spray pipe 18 is connected to the discharge side thereof.

The liquid spray pipe 18 is routed behind the liquid tank 4 and branched to three liquid spray nozzles 19a, 19b, and 19c, and each branch pipe is provided with a solenoid valve 20a, 20b, and 20c.

Furthermore, a stirring pipe 21 for stirring the inside of the liquid tank 4 is connected to the liquid dispersion pipe 18 via a three-way cock 22.
A discharge rack 24 provided with a two-way coil 23 is branched and connected.

An intake pipe 25 is connected to the three-way cock 16, and each of the plurality of chambers is communicated via a bottom valve 26.

By the way, the driving means 9 is basically composed of a variable discharge amount pump P and a constant displacement hydraulic motor M, and the swash plate tilt angle of the variable discharge amount pump P is determined by a pair of cylinders C.
It is controlled by y. An electromagnetic switching valve V serving as a flow rate control device whose position is controlled by a current value is connected to this cylinder Cy.

That is, when the attraction force generated by the coil of the electromagnetic switching valve V, which is a flow rate control device, becomes larger or smaller than the spring force due to the current supplied to the coil, the pressure oil from the supply pump Pc is diverted to one cylinder Cy. The hydraulic oil is supplied to the hydraulic motor M to change the tilt angle of the swash plate, and the hydraulic oil corresponding to the tilt angle is supplied to the hydraulic motor M.

Then, as the swash plate tilt angle changes, an attempt is made to return the solenoid switching valve vl to the neutral position via the link aml, but
As long as the current is supplied, the tilting angle corresponding to the current is maintained.

Next, the configuration of the control device 15 and the input/output devices including the operation section 13 or the display device 14 will be explained with reference to FIG. 3. First, the control device (information processing device) 15 uses a microcomputer, Device (CPU) 30
．． Memory 31. It is composed of an input circuit 32 and an output circuit 33.

The central processing unit 30 operates on the input signal from the input circuit 32 according to a predetermined program stored in the memory 31, and supplies the output signal to the output circuit 33.

The input circuit 32 is composed of an interface 34 and counters 35 and 36.

The interface 34 includes various operation switches of the operation unit 13; for example, a lane width setting switch 37 for setting the spray amount to two lanes or three lanes. Connection of the watering amount setting switch (5-level) 38 that sets the amount of watering, the automatic/manual changeover switch 39 that selects whether to spray automatically or manually, and the water level in the liquid tank 4. Detector (4
Step) The water level signals from 10 are respectively input.

Further, the counter 35 receives and counts the vehicle speed signal from the rotation speed detector 11, and the counter 36 receives the operation signal from the rotation speed detector 12.

Counting is started by an output signal from a hard timer (not shown), and output signals from the force counters 35 and 36 are output to the CPU 30 via the interface 34.

The output circuit 33 includes an interface 40, a digital-to-analog conversion interface 41. It is composed of a drive circuit 42 and a changeover switch 43.

The interface 40 outputs an activation signal to the display device 14 via the drive circuit 42 in response to the output @ of the CPU 30. Further, the digital-to-analog conversion interface 41 outputs a predetermined current to the flow rate control device 8 via the changeover switch 43.

Here, the changeover switch 43 connects the digital-to-analog conversion interface 41 and the flow rate control device 8 when the automatic/manual changeover switch 39 is set to the automatic side, and when the automatic/manual changeover switch 39 is turned to the manual side. If the manual setting dial and dial 4 of the operation section 13 are turned on,
4 and the flow rate control device 8.

Note that the operation section 13 includes the three electromagnetic valves 20a, 20.
Operation switches 45a and 45b that control opening and closing of b and 20c
, 45c are provided, and are directly connected to the electromagnetic valve drive circuit 29 without going through the control device 15.

Further, the display device 14 is used to display malfunctions based on self-diagnosis, and includes a water level display 46 that displays the water level of the liquid tank 4. A rotation speed indicator 47 that numerically displays the rotation speed of the liquid dispersion pump 5. If the synchronization between the vehicle speed and the sprinkler pump is outside the setting error range, if the rotation speed output of the sprinkler pump 5 cannot be obtained as an operating signal regardless of the supply of the command value, or if a CPU abnormality or voltage abnormality occurs. An alarm display 48 is provided to detect and display the situation.

Next, to explain the operation of the above device, first, the driver's seat 3
After turning on the main switch (not shown) in the operation section 13 and supplying the power supply voltage, the operation switch 45a,
45b, 45c are closed, and the solenoid valves 20a, 20b, 20c are switched to the open position via the IT solenoid valve drive circuit 29. Next, when the automatic/manual changeover switch 39 is switched to the automatic side and the lane setting switch 37 and spray amount setting switch 38 are set to appropriate values, these operation signals are supplied to the CPU 30 via the interface 34.
First, switch switch 43 to the automatic mode.

Next, when the liquid spray ml starts running, a running signal is detected by the rotation speed detector 11, counted by the counter 35, and transmitted to the CPU.

Here, the rotation speed of the sprinkler pump 5 is set based on the vehicle speed signal from the rotation speed detector 11, and the set value and the rotation speed of the sprinkler pump 5 are set.
Rotation speed detection that detects the rotation speed of! The measured values from S12 are compared and outputted to the flow rate control device 8 via the digital-to-analog conversion interface 41 so that they are balanced.

Thereby, the tilt angle IFi of the variable discharge amount pump P is changed, and the amount of liquid supplied by the liquid dispersion pump 5 is controlled. That is, when the vehicle speed is high, the supply amount is large, and when the vehicle speed is slow, the supply amount is regulated to be small, so that the set spray amount at the set spray amount is always controlled to be constant per unit area.

Next, a specific configuration for uniformly controlling the amount of water sprinkled per unit area will be explained with reference to FIG. 4.

First, a vehicle speed signal is input from the rotation speed detection att to a block 50, a lane width signal from the lane width setting switch 37 is input to a block 51, and a watering I signal from the water soy setting switch 38 is input to a block 52. After obtaining these signals, in block 53, the rotation speed of the liquid spray pump 5 is set as a theoretically calculated value.

On the other hand, based on the wire bundle width @ from block 51 and the watering amount signal from block 52, a correction value obtained from experimental results or the like is set in block 54. ,i.

For body weight, the relationship between the rotation speed and the amount of watering is stored in advance as a table at the amount of watering, which is set in consideration of piping resistance, etc., and a correction value is determined from this stored relational expression.

Then, in block 55, the theoretical calculation value from block 53 and the correction value from block 54 are added together to calculate and set a command value.

For example, as shown in Figure 5, the relationship between the wave band and rotation speed for a certain lane width is stored as a table, and in order to theoretically achieve the watering amount Q1, the rotation speed will be xl, but in reality Since XI' is necessary because the piping resistance reaches the saturation region, the correction value set based on the difference from this xl is added to the theoretically calculated value and set as the command value.

Further, in block 56, an operating signal is input from the rotation speed detector 12, and in block 57, the operating signal from the rotation speed detector 12 is compared with the command value from the block 55, and the difference is calculated. Detect whether it is outside the setting M difference range. When the difference is outside the set error range, a control value is set in block 58 so that the difference is balanced within the set error range, and an output signal is supplied to the flow rate control device 8.

(Effect) As described above, in the present invention, even if the application amount and application amount are set to a large value during high-speed running, the flow rate control means is controlled by correcting the application amount so as to obtain the set required application amount. Therefore, the amount of spraying per unit area can be controlled more accurately and uniformly.

[Brief explanation of drawings]

The drawings illustrate an uninvented embodiment, and Fig. 1 is an overall configuration diagram of the liquid spray vehicle, Fig. 2 is an explanatory diagram showing the piping system and drive system, and Fig. 3 is the configuration of the control device and the control device. FIG. 4 is a block diagram, and FIG. 5 is a characteristic curve diagram of the liquid dispersion pump. 4...-culture medium pump, 5... dispersion pump, 8... flow rate control means, 9... drive means, 10... water level detector, 11.12@... rotation speed detector 13・-11 operation section,
14...Fist display device, 15...Control i device

Claims (1)

[Claims] (1) A liquid spray pump that supplies liquid in a liquid tank mounted on the vehicle body to a liquid spray nozzle, a driving means for driving the liquid liquid pump, and a drive unit that controls the running speed of the vehicle and the discharge amount of the liquid liquid pump. A detection means for detecting water, an operation section provided with an operation switch for setting the water sprinkling amount, spray width, etc., and a detection signal from the detection means and various operation signals from the operation section are inputted to increase or decrease the drive means. and a control device for speed control, which corrects the discharge amount of the sprinkler pump set by the vehicle speed detection means using the lane width signal and the sprinkler amount signal, and controls the discharge amount of the sprinkler pump in units of units via a flow rate control means so as to obtain a corrected command value. A spray amount control device for a liquid spray vehicle, characterized by controlling the amount of water sprinkled per area in a balanced direction.