JP2006256612A - Display of agricultural working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a working machine such as a tractor having a controller with an input section and an output section and a liquid crystal display controlled by the controller requires costs for an exclusive controller for an individual type and is provided with a switch requiring an operator to do troublesome operation, with a possibility of errors, to designate the type of agricultural working machine. <P>SOLUTION: A hoist controller for performing the control of the elevating motion and the horizontal posture of the working machine is connected to the controller for the liquid crystal display for enabling communication. In addition, the liquid crystal display can automatically switch the display of display formats each composed of a vehicle speed, a rotational speed of a PTO shaft, and a set value of the plowing depth set by a plowing depth setting dial. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device for agricultural machines such as tractors and combines.

Conventionally, some agricultural machines such as tractors have a controller including an input unit and an output unit, and a liquid crystal display device that is controlled by the controller. Also, in general vehicles, there are known vehicles that display a confirmation item or a guidance item for an operator on a liquid crystal display device if there is a dangerous point for safety during driving.
JP 63-1111419 A

  By the way, in the tractor and the like, various working devices are mounted on a standard vehicle body to form different types of vehicle bodies. However, in the conventional structure, the liquid crystal display device performs an appropriate display. A dedicated controller is used for each type, or a switch for designating the tractor type is provided and designated by the operator.

This invention comprised the display apparatus of the agricultural machine as follows in view of the said subject.
That is, the controller for liquid crystal display is communicably connected to a host controller for performing the lifting control and horizontal posture control of the work machine, and is set in the liquid crystal display device by the vehicle speed, the PTO shaft rotational speed, and the tilling depth setting dial. This is a display device for an agricultural machine characterized in that the display format composed of the plowing depth setting value can be automatically switched and displayed.

  In the agricultural machine, the connection state of the sensor is read by the controller, and the display format of the liquid crystal display device is changed according to the connection state.

  This eliminates the cost of using a dedicated controller for each type, and eliminates the hassle and error of specifying the type of the tractor and the like by the operator.

Hereinafter, the meter panel used for the tractor will be described.
A meter panel 2 is attached to the upper surface of the dashboard below the steering handle. The meter panel 2 is provided with a tachometer 3, an hour meter 4, a blinker lamp 5 and the like at the center, a water temperature meter 6 and a fuel meter 7 on the left side, and the liquid crystal display device 1 and its display on the right side. A reset switch 8 that resets the shift, a shift position lamp 9 that indicates a shift position such as a main shift and a sub-shift are provided. In addition, a monitor lamp 10 is provided on these parts.

  As shown in FIG. 3, the control circuit related to the character display device using the liquid crystal display of the tractor is provided with a meter BOX having a controller for performing a liquid crystal display, a tachometer 3 display, etc. A control box C-BOX 1 as a host to be performed is directly connected, and a controller C-BOX 2 for shift control and a controller C-BOX 3 for performing switching control of full-time four WDs to these controllers, Asynchronous (asynchronous) communication is established, and the C-BOX 1 is asynchronous (asynchronous) with a microcomputer checker terminal, a work management terminal that manages data to be transmitted, control codes, and the like. Formula) It can be communicated.

  The communication between the control boxes is performed by sending and receiving to / from the control boxes of the other meters BOX, C-BOX2, and C-BOX3 using the C-BOX1 as a host. The meters BOX and C-BOX2 , Sucking up information from the C-BOX 3 and giving instructions to each controller according to instructions from a microcomputer checker or the like.

  The circuits having these controllers are shown in the tables of FIGS. 4 to 7. The main information on the transmission request and data transmission from the C-BOX 1 to the meter BOX is as shown in Table 1, and the sensor of the C-BOX 1 Error, control mode, set value set by the tilling depth setting dial which becomes a sensor for detecting the setting operation of the operator of the present invention, general information of C-BOX2, shift position (target value), etc., from meter BOX The main information of data transmission to the C-BOX 1 is the rotational speed of the wheel, the rotational speed of the power take-out shaft PTO, meter information, etc. as shown in Table 2.

  The information transmitted from the C-BOX 1 to the C-BOX 2 is a control mode (data transmission request or actuator output request). The output request information includes boost solenoid output, shift output, There are other outputs. As shown in Table 4, the transmission data from C-BOX 2 to C-BOX 1 includes engine speed, wheel speed, general information, shift position, sensor input, and the like.

  The information transmitted from C-BOX 1 to C-BOX 3 is the control mode (data transmission request or actuator output request). The transmission data from C-BOX 3 to C-BOX 1 is as shown in Table 5. These are the input rotation speed, output shaft rotation speed, steering wheel turning angle sensor, C-BOX3 input information, and the like.

  In the control circuit as described above, the operation relating to the liquid crystal display device is performed according to the flow of the control program serving as the display changing means in FIG. On the screen of the liquid crystal display device 1 using the liquid crystal of the meter panel 2, a vehicle speed (km / h) is displayed at the upper position of the right half as a standard screen at normal time, and the rotation speed (rpm) of the PTO shaft is displayed at the lower position. ) And display each display area so that the tilling depth setting value is displayed on the left half.

There are three types of meter display formats on the standard screen: A, B, and C as follows (FIG. 8).
A type: Only the vehicle speed and the PTO shaft speed are displayed. The vehicle speed is converted and displayed by the detection pulse by the wheel rotation sensor (every 500 msec). The display range is from 1 to 14.9 km / h, and when “less than 1 km / h” is detected, “shasoku” is simply displayed. This is a measure for preventing the operator from feeling uncomfortable by suppressing the flickering of the display at a low rotation. The PTO rotation is converted and displayed from the PTO rotation sensor detection pulse (for example, every 500 msec). The display displays 100 rpm or more according to the detection, and if it is less than 100 rpm, it simply displays “PTO”.

B type: The vehicle speed and the rotational speed of the PTO shaft are the same as the A type. The plowing depth setting is additionally displayed based on the data transmitted from the C-BOX 1 (FIG. 9).
C type: The display is changed according to the shift position data transmitted from C-BOX1. When the shift position is H speed, the vehicle speed at the rated engine speed is detected by blinking when the shift shift position is detected, and the vehicle speed pulse is switched to A type display when 1 km / h or more is detected. When the shift position is LL, L, or M speed, the vehicle speed at the rated engine speed at the shift shift position is displayed. The PTO shaft rotation speed display is the same as that of the A type. The plowing depth setting is the same as the B type.

  Such determination of each type A, B, and C is performed within 3 seconds after the power is turned on, depending on the presence / absence of communication access from the C-BOX 1. Those without communication access from C-BOX1 have communication access from type A, communication access from C-BOX1, those with or without C-BOX2 information in communication data are type B, and those from C-BOX1 A type that has communication access and has C-BOX2 information present / not present in the communication data is C type. The display screen is displayed in the A type until the first communication is completed, and shifts after the completion.

  In the meter BOX controller having the tractor liquid crystal display device 1 configured as described above, a dedicated controller is used depending on the type of the tractor, and a switch for designating the tractor type is used. The troublesomeness and the error specified by the operator are eliminated.

  Items displayed on the liquid crystal display device 1 as an interrupt screen include those displayed at the start, items displayed during operation, and items displayed abnormally. Among these, what is displayed at the start is displayed based on various conditions in FIGS. 10D to 10G and blinks until the condition is canceled. These matters guide the operator according to the display.

  As displayed during operation, the display of FIG. 11H is displayed based on the fuel sensor condition and blinks when the condition is released and until the reset switch is pressed. At the time of this display, a buzzer is output for a certain time when the display is switched. Also, the display of FIG. 11H-A blinks for a certain period of time based on the conditions. Also, a buzzer is output for a certain period of time as described above. Such matters guide the operator according to the display.

  As displayed during operation, there are the displays of FIGS. Judgment is made by the mode selector switch, and when the switch input is changed, it is displayed for a certain time. However, the display of “full time switch?” Of L is continued until the reset switch is pressed. Each of these displays is confirmed by the operator. Although there are FIGS. 13M to S as the abnormality display, it is displayed based on the abnormality information sent by communication, and is displayed until the reset switch is pressed or the abnormal state is released. The display flashes. This display is also confirmed by the operator.

The top view of the meter panel part of a tractor. The flowchart of a character display control part. Block Diagram. The block circuit diagram of a controller (meter BOX). The block circuit diagram of a controller (C-BOX1). The block circuit diagram of a controller (C-BOX2). The block circuit diagram of a controller (C-BOX3). The top view which shows a character display form. The top view which shows a character display form. The top view which shows a character display form. The top view which shows a character display form. The top view which shows a character display form. The top view which shows a character display form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Meter panel 3 Tachometer 4 Hour meter 5 Turn signal lamp 6 Water temperature meter 7 Fuel meter 8 Reset switch 9 Position lamp 10 Monitor lamp

Claims (1)

  The controller for liquid crystal display is communicably connected with a host controller for performing the lifting control and horizontal posture control of the work machine, and the plowing depth set by the vehicle speed, the PTO shaft rotation speed and the plowing depth setting dial on the liquid crystal display device A display device for an agricultural machine characterized in that a display format consisting of set values can be automatically switched and displayed.

Images