KR20010013833A - Display controller of construction machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control apparatus for a construction machine capable of widening a residential space in a cab and improving an operator's working efficiency. A plurality of control devices 20, 22, 25 for controlling the operation of each part, and a display device 26 for displaying the status of each part of the construction machine, and these control devices and the display device to the common communication line 30 Input means 28 for instructing display of conversion of display information indicative of the state of each part of the construction machine, and display information corresponding to the command is drawn out from the respective control apparatuses and displayed. Characterized in that it comprises a display means (27, 29).

Description

DISPLAY CONTROLLER OF CONSTRUCTION MACHINE}

Conventionally, a control device installed in a construction machine such as a hydraulic excavator includes a first control device that performs an operation command for an outline construction machine and a control operation command required for operation of each part of the construction machine based on the operation command from the first control device. And a third control device for outputting an operation control command from the second control device to an actuator for driving each part of the construction machine, and a display device for displaying various information about the construction machine. have. A plurality of electric signal lines are provided between the control apparatus and the display apparatus to exchange signals related to each other.

Since many of these electrical signal lines are installed by wiring connection, the structure is complicated, resulting in high cost. In order to solve this problem, Japanese Laid-Open Patent Publication No. 7-113854 proposes a display control device for a construction machine that connects control devices and display devices distributed in a common data bus to exchange control signals. According to this prior art, the connection of the electric signal lines can be simplified, and the cost can be reduced. As a result, the control device for the construction machine can be improved.

On the other hand, construction machinery is a display device for displaying various information, such as fuel remaining amount, engine speed, operating oil temperature, etc. necessary for normal operation, to improve the operability of the construction machinery, failure information of the machine and A display device for displaying the history information, or a display device provided with a control switch for starting and stopping the automatic control while displaying the posture of the front mechanism installed in the front part of the construction machine in a highly functional construction machine. It is required to install it.

However, in the case where the plurality of display devices are connected to the plurality of control devices distributed over a common communication line, the connection wiring increases, which leads to complicated wiring. In addition, when a plurality of display devices are provided in the cab of the construction machine, there is a problem that the space in the cab becomes narrow and the habitability deteriorates.

As described above, in the case where a display device serving as a plurality of operation units is provided in the cab, the display device is usually installed in front of the operator's right front side. There has been a problem that the operation of the attached operation unit must be performed, which causes a large burden on the operator.

Disclosure of Invention An object of the present invention is to provide a display control apparatus for a construction machine that can sufficiently secure a space in a cab and improve the operability of an operator in view of the various problems described above.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control device for a construction machine, and more particularly, to a display control device for a construction machine capable of displaying detection information or failure information from a plurality of control devices for controlling a construction machine such as a hydraulic excavator.

1 is a diagram showing an outline of a display control apparatus for a construction machine according to an embodiment of the present invention;

FIG. 2 is a diagram showing the configuration of the control device 20 shown in FIG. 1;

FIG. 3 is a diagram showing the configuration of the control device 22 shown in FIG. 1;

FIG. 4 is a diagram showing the configuration of the posture calculating device 25 shown in FIG. 1;

FIG. 5 is a view showing the display device 26 shown in FIG. 1;

6 is a flowchart showing a processing procedure of discharge amount control in the control device 20 shown in FIG. 1;

7 is a flowchart showing a processing procedure for receiving data from another control device via the common communication line 30 in the control device 20 shown in FIG. 1;

8 is a flowchart showing a processing procedure of data transmission from the control device 20 shown in FIG. 1 to another control device;

9 is a flowchart showing a processing procedure of operation control in the control device 22 shown in FIG. 1;

10 is a flowchart showing a processing procedure of posture control in the posture computing device 25 shown in FIG. 1;

FIG. 11 is a diagram showing an example of input / output characteristics of the swash plate preposition position detector 17 shown in FIG. 1;

FIG. 12 is a diagram showing a relationship between a fault plug and a failure history plug stored in the RAM 204 and the EEROM 208 in the control device 20 shown in FIG. 2;

FIG. 13 is a flowchart showing a processing procedure for fault diagnosis based on the swash plate tilt angle θ in the control device 20 shown in FIG. 1;

FIG. 14 is a diagram showing the configuration of a message which is the minimum unit of data transmitted and received between the control device 20, the control device 22, and the posture calculating device 25 shown in FIG.

FIG. 15 is a flowchart showing a processing procedure of the display processing apparatus 27 shown in FIG. 1;

FIG. 16 shows the contents of the message A transmitted from the display processing apparatus 27 shown in FIG. 1;

17 is a diagram showing the contents of the message B transmitted from the control device 20 shown in FIG. 1;

18 is a diagram showing the contents of a message A 'transmitted from the display processing apparatus 27 shown in FIG. 1;

19 is a diagram showing the contents of the message C transmitted from the posture computing device 25 shown in FIG. 1;

20 is a diagram showing the contents of a message A "transmitted from the display processing apparatus 27 shown in FIG.

FIG. 21 shows the contents of the message D transmitted from the control device 20 shown in FIG. 1;

FIG. 22 shows the contents of the message E transmitted from the control device 22 shown in FIG. 1;

FIG. 23 is a diagram showing the contents of the message F transmitted from the posture computing device 25 shown in FIG. 1;

24 is a diagram illustrating a plurality of display examples converted to and displayed by the display unit 29 illustrated in FIG. 1.

In order to achieve the above object, the invention of claim 1 displays a plurality of control devices for controlling the operation of each part of the construction machine based on information obtained from the detection means installed in each part of the construction machine, and displays the situation of each part of the construction machine. A display control device for a construction machine, comprising a display device, wherein the control device and the display device are connected by a common communication line, the display device instructing the display of conversion of display information indicating the situation of each part of the construction machine. And input means, and display means for capturing and displaying display information corresponding to the command from the respective control devices.

The invention of claim 2 is characterized in that in the invention of claim 1, the display means comprises a single display portion for displaying the various display information to be converted and displayed.

The invention of claim 3 is the invention of claim 1 or 2, wherein each control device includes detection means associated with each control device and failure diagnosis means for diagnosing a failure of a control object.

The invention of claim 4 is the invention of claim 3, wherein the fault diagnosis means of the control device diagnoses a failure of at least the detection means and the actuator of the construction machine.

In the invention according to claim 5, in the invention according to claim 3 or 4, when the fault is detected in the fault diagnosis means of each control device, the display device displays fault information in preference to display information other than the fault information. It is characterized by.

The invention of claim 6 is characterized in that in the invention of claim 3 or 4, the command includes a command for transmitting the failure information.

EMBODIMENT OF THE INVENTION Below, one Embodiment of this invention is described using FIGS.

1 is a diagram showing a display control apparatus for a construction machine according to the present embodiment.

In the figure, 1 is a construction machine such as a hydraulic excavator, and the construction machine 1 is the front of the swinging body 3 and the swinging body 3 provided on the rough traveling body 2 and the traveling body 2. Boom (6) and boom (6) and buoy (6) installed in front of the cab (4) and the swivel (3) and the swivel (3). Hydraulic cylinder (9) and arm (7) for floating the bucket (8) and the pour (6) rotatably installed at the tip of the arm (7) and the arm (7) rotatably installed at the tip. It consists of a hydraulic cylinder (10) for rotating the cylinder and the hydraulic mechanism (ll) for rotating the bucket (8) and a link mechanism (12) for connecting the hydraulic cylinder (11) and the bucket (8).

In addition, the electric system and the hydraulic system displayed on the outside of the construction machine 1 of FIG. 1 are mounted inside the construction machine 1.

In these control systems, 13 is an oil tank, 14 is a hydraulic pump, 15 is a control valve for controlling the flow rate of the pressurized oil supplied from the hydraulic pump 14 to the swelling hydraulic cylinder 9, 16 is a hydraulic pump 14 Is a pressure detector for detecting the discharge pressure of the valve, 17 is a swash plate position detector for detecting the tilting position of the swash plate of the hydraulic pump 14, l8 is a hydraulic oil temperature detector for detecting the operating oil temperature in the oil tank, A swash plate tilt position control device for controlling the swash plate tilt position of the hydraulic pump 14.

20 is a control device for the hydraulic pump 14, and the device 20 is based on the pressure signal Pd from the pressure detector 16 and the swash plate angle signal θ from the swash plate tilt position detector l7. The tilting position of the swash plate of the hydraulic pump 14 is adjusted via the swash plate position control device 19 to control the pushing volume of the hydraulic pump 14, that is, the discharge flow rate. In addition, 2l is a boolean control lever and 22 is a boolean control device connected to the boolean operation lever 2l, and this device 22 controls the control valve 15 based on the operation signal X of the boolean operation lever 21. The valve opening is adjusted by adjusting the valve opening degree.

In addition, FIG. 1 shows only a control system consisting of a control valve 15 for controlling the boom driving hydraulic cylinder 9, a boolean operating lever 2l, and a boolean control device 22, but the hydraulic cylinder for arm driving 10 ), A control system for driving a bucket driving hydraulic cylinder 1l, a turning body driving hydraulic motor and a traveling body driving hydraulic motor is similarly provided, but these control systems are omitted in order to avoid the complexity of the description.

23 is a pour angle detector for detecting the rotation angle of the pour (6), 24 is an arm angle detector for detecting the rotation angle of the arm (7), 25 is a posture computing device for calculating the attitude of the front mechanism (5), This apparatus 25 calculates the attitude of the front mechanism 5 based on the detection signal (alpha) and the detection signal (beta) from the pour angle detector 23 and the arm angle detector 24. As shown in FIG.

26 is a display device, 27 is a display processing device, 28 is a display conversion unit, and 29 is a display unit.

In addition, the display processing device 27, the posture computing device 25, the booze control device 22, and the control device 20 of the hydraulic pump 14 are connected to a common communication line 30 to enable bidirectional communication.

FIG. 2 is a diagram illustrating a configuration of the control device 20 shown in FIG. 1. In addition, the part of the code | symbol same as the code | symbol shown in FIG. 1 represents the same part.

In the figure, 201 is an A / D converter for inputting the pressure signal Pd from the pressure detector 16 and the swash plate position signal θ from the swash plate position detector 17 to convert it into a digital signal. Is a central processing unit (CPU), 203 is a control program for performing control processing, a read-only memory (ROM) storing various programs such as a fault diagnosis program and constants necessary for control, and 204 is a result or operation of a calculation processing. Random access memory (RAM) for temporarily storing numerical values during processing, 205 is an output interface (I / O), 206 is an amplifier for outputting the drive signal of the swash plate of the hydraulic pump 14 to the swash plate position control device 19, 207 is a communication means for controlling communication between control devices connected to a common communication line 30, and having a memory for storing communication data, and 208 as a nonvolatile memory for storing a history of fault information. EEPR0M (Ele ctrically Erasable Programmable Read OnIy Memory), which stores fault information even when the power is off.

3 is a diagram illustrating the configuration of the control device 22 shown in FIG. 1. In addition, the part of the code | symbol same as the code | symbol shown in FIG. 1 represents the same part.

In the figure, reference numeral 221 denotes an A / D converter for converting the operation signal X from the boolean operation lever 21 into a digital signal, 222 denotes a central processing unit (CPU), 223 denotes a control program for control processing, Read-only memory (ROM) for storing constants necessary for various programs and control such as a fault diagnosis program, 224 for a random access memory (RAM) for temporarily storing a result of a calculation process or a value during a calculation process, and 225 for a digital signal A D / A converter for converting an analog signal, 226 is an amplifier for outputting a signal from the D / A converter 225 to the control valve 15, and 227 is each control device connected to a common communication line 30. Communication means including a memory for storing communication data while controlling communication between them, 228 is an EEPROM as a nonvolatile memory that stores a history of fault information.

4 is a diagram illustrating the configuration of the posture calculating device 25 shown in FIG. 1. In addition, the part of the code | symbol same as the code | symbol shown in FIG. 1 represents the same part.

In the figure, reference numeral 251 denotes an A / D converter for inputting an angle signal α from the arm angle detector 23 and an angle signal β from the boolean angle detector 24 and converting it into a digital signal. Arithmetic processing unit (CPU), 253 is a read-only memory (ROM) which stores various programs such as a control program for control processing, a fault diagnosis program, and constants necessary for control, and 254 is a result of arithmetic processing or a numerical value during arithmetic processing Random access memory (RAM) for temporarily storing data, 255 is a D / A converter for converting a digital signal into an analog signal, and 256 is for controlling communication between control devices connected to a common communication line 30, Communication means having a memory for storing various data, 257 is an EEPROM as a nonvolatile memory that stores a history of fault information.

5 is a diagram showing the display device 26, the display processing device 27, the display conversion unit 28, and the display unit 29 according to the present embodiment. In addition, the part of the code | symbol same as the code | symbol shown in FIG. 1 represents the same part.

In the figure, 281, 282, and 283 are a plurality of display conversion switches which are operated when the operator wants to change the display contents.

271 denotes an interface for inputting signals from the display conversion switches 28l to 283, 272 denotes a central processing unit (CPU), 273 denotes a control program necessary for control processing, various programs such as a fault diagnosis program, and constants necessary for control. Read-only memory (ROM) for storing data; 274 a random access memory (RAM) for temporarily storing arithmetic results or numerical values during calculation, 275 is an output interface (I / O), and 276 is a display command to the display unit 29. Screen display control device for receiving data and sending data to display unit 29, 277 is an EEPROM as a nonvolatile memory that stores a history of fault information, and 278 controls communication between control devices connected to a common communication line 30. And a memory for storing communication data.

In the apparatuses 20, 22, 25, and 27 shown in Figs. 2 to 5, the A / D converter or interface displayed within the dotted line range, the central processing unit (CPU), the read-only memory (ROM), and the random The access memory (RAM), the output interface (I / O), and the D / A converter consist of a single chip microcomputer.

Next, the operation of the control device 20 shown in FIG. 2 will be described with reference to FIGS. 6 to 8.

FIG. 6 is a flowchart showing a processing procedure of discharge amount control of the hydraulic pump 14 in the control device 20 shown in FIG. 2.

Initially, in step 60, the constants necessary for the control process are read out from the ROM 203 or the EEPROM 208. Next, in step 61, the pressure signal Pd detected from the pressure detector 16 via the A / D converter 201, the swash plate angle signal θ detected from the swash plate preposition position detector 17, and the oil tank ( The hydraulic oil temperature detection signal t of 13) is read. Next, a fault diagnosis is performed based on the numerical data read in step 62. The failure diagnosis is performed by determining that the numerical data is a failure when the numerical data is equal to or larger than a predetermined upper limit value or below a predetermined lower limit value. The details are later. Next, in step 63, the target tilt angle θr of the hydraulic pump 14 is calculated, and in step 64, the swash plate tilt position control device so that the swash plate tilt position signal θ coincides with the target tilt angle θr. A control signal is output to 19, and the tilt angle of the hydraulic pump 14 is controlled to control the discharge amount of the hydraulic pump 14.

FIG. 7 is a flowchart showing a processing procedure of data transmitted from other devices 22, 25 and 27 via the common communication line 30 in the control device 20. As shown in FIG. First, when the communication means 207 shown in FIG. 2 completes reception of data from the other devices 22, 25, and 27 normally, a plug indicating that the reception processing is normally completed is raised to the control device 20. FIG. Send a receive complete interrupt signal. At this time, the received data is stored in the memory in the communication means 207. When the control device 20 receives the reception interrupt signal, the control device 20 automatically starts the reception interrupt processing program shown in FIG. 7.

When the interrupt process is started, the data stored in the communication means 207 is transferred to the RAM 204 in step 70. Next, since reception is completed in step 7l, the plug is removed.

The control device 20 performs predetermined calculation processing based on the control program stored in the ROM 203 by using the data stored in the RAM 204.

In addition, although the above description demonstrated the reception process in the case where the data from another apparatus was transmitted to the control apparatus 20, the reception process of the same data as the control apparatus 20 is performed also in each other apparatus.

FIG. 8 is a flowchart showing a processing procedure for transmitting data to other devices 22, 25, and 27 via a common communication line 30 in the control device 20. As shown in FIG.

The data to be transmitted in step 80 is transferred from the RAM 204 shown in FIG. 2 to the memory in the communication means 207. In step 81, the transmission request plug is set up. The communication means 207 converts the data on which the transmission request plug is established into serial data in time series and transmits it to the common communication line 30.

In the above description, the transmission process in the case of transmitting data from the control apparatus 20 to another apparatus, and the data transmission process similar to the control apparatus 20 are performed also in each other apparatus.

FIG. 9 is a flowchart showing the processing procedure of the flow rate control of the pressure oil of the control valve 15 in the control apparatus 22 shown in FIG.

Initially, in step 90, the constants necessary for the control operation are read from the ROM 223 or the EEPROM 228. Next, in step 91, the operation signal X from the boolean operation lever 21 is read out via the A / D converter 221. Next, in step 92, a failure diagnosis is performed using the operation signal X. The failure diagnosis is performed by determining that the operation signal X is a failure when the operation signal X is equal to or larger than a preset upper limit value or below a preset lower limit value. The details are later. Next, in step 93, the operation amount of the control valve 15 in accordance with the operation signal X is calculated. Next, in step 94, the operation amount of the control valve 15 is output via the D / A converter 225 and the amplifier 226.

FIG. 10 is a flowchart showing a processing procedure for calculating the posture of the front mechanism 5 in the posture computing device 25 shown in FIG. 4.

In step 100, first, in order to calculate the posture of the front mechanism 5, the dimension data of the boom 6, the arm 7, etc. constituting the front mechanism 5 is transferred from the ROM 253 or the EEPROM 257. FIG. Read it. Next, in step 10l, the angle signal α from the pour angle detector 23 and the angle signal β from the arm angle detector 24 are read through the A / D converter 25l. In step 110, a fault diagnosis is performed using the angle signal. The failure diagnosis is performed by determining that the angle signal alpha and the angle signal beta are equal to or more than a predetermined upper limit and a predetermined lower limit. The details are later. Next, in step 103, the attitude of the front mechanism 5 is calculated and stored in the RAM 254 using the dimensional data of each part of the front mechanism 5 and the angle signals α and β.

Next, a failure diagnosis based on the swash plate tilt position signal θ detected from the swash plate tilt position detector 17 in the control device 20 will be described with reference to FIGS. 11 to 13.

FIG. 11 is a diagram illustrating an example of input / output characteristics in the A / D converter 201 shown in FIG. 2.

In the figure, the swash plate tilt position detector 17 detects the tilt angle at the tilt position of the swash plate of the hydraulic pump 14, and outputs a voltage signal of 0 V to 5 V in accordance with the detected angle. If the electric signal is converted from the analog signal to the 8-bit digital signal of a0 to a4 by the A / D converter 201, the swash plate position detector 17 () has a range from 0V to -160 °. When it is detectable as 5V, the digital value in the case of -20 ° is made to correspond to the digital value a4 in the case of 160 °, and the correspondence between them is set in a linear proportional relationship.

Here, the swash plate tilting is performed so that the digital value when the movable range of the swash plate tilt angle of the hydraulic pump 14 reaches a maximum of 45 degrees is a2, and the swash plate tilting position detector 17 outputs a signal indicating 0 degrees at the minimum tilt position. When the position detector 17 is provided, the value obtained through the A / D converter 201 becomes approximately al to a2. Values smaller than a1 or larger than a2 will not be entered structurally. By using this principle, failure diagnosis of the swash plate pre-position position detector 17 can be performed.

FIG. 12 is a diagram showing the relationship between the fault plug and the fault history plug stored in the RAM 204 and the EEPROM 208 shown in FIG.

In the figure, 2041 is a θ fault plug that is set when a fault relating to the swash plate tilt angle θ is determined, 2042 is a Pd fault plug that is set when a fault relating to the pressure signal Pd is determined, and 2043 is a swash plate warp. Θ failure history plug for angle θ, 2044 is Pd failure history plug for pressure signal Pd, 208l is θ failure history plug for swash plate tilt angle θ, 2082 is Pd for pressure signal Pd Fault history plug.

When the value of the swash plate preposition signal θ has entered the failure diagnosis area in the past, " 1 " Θ failure history plug 2043 and Pd failure history plug 2044 in RAM 204 are copied from θ failure history plug 2021 and Pd failure history plug 2082 in EEPROM 208, respectively. 20 is copied at the rise. Even if the failure information of the RAM 204 is deleted, it is always secured in the EEPROM 208.

FIG. 13 is a flowchart showing the processing procedure of the failure diagnosis program based on the swash plate tilt angle [theta] in the control device 20. As shown in FIG. In this case, the range for diagnosing the failure as a margin is set to a3 or more and al or less in FIG. 11.

In the figure, in step 120, the swash plate pre-position signal θ is read through the A / D converter 201. Next, in step l21, the value of the read swash plate position signal θ is checked, and when the swash plate position signal θ is smaller than a1, that is, when the swash plate position position angle is -2 ° or less, the swash plate position Judgment is made by dividing into three cases where the signal θ is larger than a3, that is, when the swash plate position angle is 142 ° or more and the above. If the swash plate position signal θ is smaller than al, or larger than a3, the failure of the swash plate position detector 17, the disconnection of the electrical wiring between the control device 20 and the swash plate position detector 17, or You can think of shots. If it is determined in step 12l that the swash plate position signal θ is smaller than a1, the flow advances to step l22, where the value of the swash plate position signal θ is smaller than a1, but is represented by al. Next, in step 123, the? Fault plug 2041 of the RAM 204 is set to "1". Next, in step l24, the failure information is transmitted to the display processing apparatus 27 in the order shown in FIG.

If it is determined in step l2l that the swash plate position signal θ is greater than a3, the flow advances to step 125 and the read value of the swash plate position signal θ is larger than a3. Represent as

Next, in step 126, the [theta] fault plug 2041 of the RAM 204 is set to "1". The failure information is transmitted to the display processing apparatus 27 in the order shown in FIG.

If the swash plate preposition signal θ is outside the above failure diagnosis area, the flow advances to step l28 to check whether the θ fault plug 2041 of the RAM 204 is set to "0". If it is determined that the θ fault plug is not “O”, the flow proceeds to step 129 to set the fault plug 204l to “O”.

Next, in step 130, it is checked whether the? Fault plug 2041 of the ROM 204 is "1", and whether the? Fault history plug 2043 is "0". If this condition is satisfied, it indicates that a new failure has occurred at this time. Therefore, the flow advances to step l31 to set the failure history plug 2043 in the RAM 204 to "1" and the failure history plug in the EEPROM 208. "1" is transmitted to 208l.

By the above processing, the failure detection of the swash plate pre-position position detector 17 and the history of the failure can be stored in the storage ROM 204 and the EEPROM 208.

Incidentally, the above-mentioned failure diagnosis was performed only with respect to the swash plate inclination angle θ of the control device 20, but the pressure signal Pd, the control device 22 and the posture calculating device (the control device 20) The failure diagnosis in 25) is also performed as described above, and thus description thereof is omitted.

Next, the conversion display of the various data in the display part 29 by the display processing apparatus 27 shown in FIG. 1 is demonstrated using FIGS. 14-23.

FIG. 14 is a diagram showing the configuration of a message which is the minimum unit of data transmitted and received between the apparatuses 20, 22, 25 and the display processing apparatus 27. As shown in FIG.

The message consists of up to eight byte-type (8-bit) data and an ID number unique to the message, and reception is controlled by the ID number. For example, when the message of ID number A comes from the display processing apparatus 27 to the control apparatus 20, the control apparatus 22, and the attitude | position computing apparatus 25, respectively, the control apparatus 20 and the control apparatus 22 Is received, but the posture calculating device 25 does not receive. In the control apparatus 20 and the control apparatus 22, a message is stored in the memory provided in each communication means 207 and the communication means 227. As shown in FIG.

As described above, according to the present embodiment, for each device of the devices 20, 22, and 25, which message is received in advance, l: N (multiple devices) is transmitted only by one message transmission. I can do it.

FIG. 15 is a flowchart showing the processing procedure of display conversion control in the display processing apparatus 27 with respect to the display conversion request by the operator.

Here, the display conversion request of the operator is performed by any one of the display conversion switches 281 to 283 in the display conversion unit 28 shown in FIG.

Initially, in step 150, the operation signal from any of the display conversion switches 281-283 is introduced into the display processing apparatus 27 via the interface 271, and the operation information input in step l5l is analyzed. . In step 152, it is determined whether or not the operation information is in the maintenance / checking mode. If it is not in the maintenance / checking mode, it is determined in step 153 whether it is a display request of a content different from the currently displayed content, and if data held by another device is needed, the flow proceeds to step 154. In step 154, the data transmission request for the control device 20, the control device 22, and the posture computing device 25 is made.

Here, for example, when there is a display request of the front depth d while the operating oil temperature t is being displayed, the control device 20 transmits a message requesting the stop of the message transmission, and the posture calculating device 25 receives the front request. The message requesting the transmission of a message relating to the depth d of the mechanism 5 is transmitted.

FIG. 16 shows the contents of the message A transmitted from the display processing apparatus 27 to the apparatuses 20, 22, and 25. In FIG. This message A is transmitted from the display processing apparatus 27 to the control apparatus 20, the control apparatus 22, and the attitude | position calculation apparatus 25, when it wants to display the operating oil temperature t on the display part 29. As shown in FIG. . Since a plug for requesting the hydraulic oil temperature t is erected in this message A, when the control device 20 of the hydraulic pump 14 receives this message, the message B storing the hydraulic oil temperature t is received. Is sent to the display processing apparatus 27. 17 shows the contents of the message B at this time.

Here, when there is a display request of the front depth d of the front mechanism 5 from the display processing apparatus 27, the display processing apparatus 27 changes the content of the message A to the message A 'and controls it. The apparatus 20 transmits to the apparatus 20, the control apparatus 22, and the attitude calculation apparatus 25. As shown in FIG.

Fig. 18 shows the contents of the message A 'at this time. The message A 'is transmitted from the display processing device 27 to the control device 20, the control device 22, and the posture calculating device 25 when the front depth d is desired to be displayed on the display unit 29. Message. Since the plug A requesting the front depth d is erected in this message A ', when the posture calculating device 25 receives this message, the display processing device displays the message C storing the front depth d. (27). 19 shows the contents of the message C at this time.

In step 155 of the flowchart shown in FIG. 15 again, when the display processing apparatus 27 receives a new message, for example, the message C, in step 156, the display unit 29 has a front mechanism. The front depth d of (5) is indicated.

In addition, at step 160, failure information from another device is sequentially received by the reception interrupt at step 59, and the failure information is displayed on the display unit 29 at step 156.

Next, the display processing at the time of maintenance and inspection will be described again using the flowchart shown in FIG.

In step 150, in the case of requesting display conversion by an operator or another operator for maintenance and inspection on the construction machine, any one of the display conversion switches 281 to 283 in the display conversion unit 28 is required. It is performed by operation. In step 151, the operation information introduced into the display processing apparatus 27 is analyzed. In step 152, it is determined whether or not it is in the maintenance / checking mode, and in the present case, the maintenance / checking mode is performed. 25) Request for data transmission required for maintenance and inspection. Fig. 20 is a diagram showing the contents of the message A "sent from the display processing apparatus 27 to another apparatus. This is the contents of the plug of the failure diagnosis mode K in the message shown in Fig. 16 or 18. Figs. It corresponds to what set the part to "1" (ON).

Fig. 21 is a diagram showing the contents of the message D to be transmitted when the control device 20 that has received the message with the plug of the failure diagnosis mode K being " 1 " detected a failure of the hydraulic oil temperature detector. In the figure, the plug indicating the failure of the pressure Pd of the pump discharge pressure detector 16, the plug indicating the failure of the swash plate tilt angle θ of the swash plate tilt position detector 17, and the operating oil temperature detector 18 The plug of the hydraulic oil temperature t is set to "1" among the plugs showing the failure of the hydraulic oil temperature t of

Fig. 22 is a diagram showing the contents of a message E transmitted when the control device 22, which has received a message with the plug of the failure diagnosis mode K being "1", detects a failure of the operation lever 21. Figs. . In the figure, the plug indicating the failure of the operation (x) of the operation lever 21 is set to "1".

Fig. 23 shows that the posture calculator 25 receives the message that the plug of the failure diagnosis mode K is " 1 " and detects the detection signal? And the arm angle detector 24 of the swelling angle detector 23; It is a figure which shows the content of the message E transmitted when a failure of the signal (beta) is detected. In the figure, the plug indicating failure of the detection signal α and detection signal β is set to "1".

When the display processing apparatus 27 receives a message containing failure information such as the above-mentioned messages D, E, and F, the failure information is preferentially displayed instead of the information displayed so far in step 156. do.

FIG. 24 is a diagram showing a plurality of display examples converted and displayed on one display unit 29, and FIG. 24A is a display example of the operation status of the current construction machine such as the current engine speed, operating oil temperature, operating time, and the like. 24B is an example of display of the inclination angle of the construction machine with respect to the inclination image and the plane of the construction machine, and FIG. 24C is an example of display of the failure information of the construction machine.

As described above, according to the present embodiment, a plurality of pieces of information such as information necessary for operation, failure information, and history of failure can be converted and displayed on one display unit. In addition, since the information of the failure is displayed first, the operator can recognize the information of the failure quickly, and it is possible to prevent malfunction of the construction machine due to the failure of the sensor or the actuator.

In addition, since the display device displays a plurality of pieces of information on one display unit, the cost of the display device can be reduced and the living space in the cab can be increased.

The present invention connects a plurality of control devices for controlling the operation of each part of the construction machine based on the information obtained from the detection means installed in each part of the construction machine, and a display device for displaying the status of each part of the construction machine via a common communication line. Therefore, by input from the display device, input signals, failure information, control operation results, failure history information, etc. of sensors or actuators installed in each part of the construction machine can be converted and displayed on one display unit. Since various information about construction machinery can be obtained easily, the work efficiency of an operator can be improved. In addition, since one display device may be provided in the cab, the living space in the cab can be enlarged, and the dwellability can be improved.

Claims (6)

And a plurality of control devices for controlling the operation of each part of the construction machine based on the information obtained from the detection means installed in each part of the construction machine, and a display device for displaying the status of each part of the construction machine. In the display control device for construction machinery which is connected by a common communication line, The display device comprises input means for instructing display of conversion of display information indicating the status of each part of the construction machine, and display means for extracting and displaying display information corresponding to the command from the respective control devices. Display control device of construction machinery. The method of claim 1, And said display means is provided with a single display portion for displaying the various display information to be converted and displayed. The method according to claim 1 or 2, And each control device includes detection means for each control device and failure diagnosis means for diagnosing a failure of a control object. The method of claim 3, wherein The failure diagnosis means of the control device is a display control device for a construction machine, characterized by diagnosing a failure of at least the detection means and an actuator of the construction machine. The method according to claim 3 or 4, And the display device displays fault information in preference to display information other than the fault information when a fault is detected in the fault diagnosis means of each control device. The method according to claim 3 or 4, And the command includes a command for transmitting the failure information.