JP2020136973A - Remote monitoring method for construction machine and remote monitoring system for construction machine - Google Patents

Abstract

To provide a remote monitoring method for a construction machine capable of accurately determining whether a failure has occurred in a construction machine located at a distance and accurately estimating the cause of the failure.SOLUTION: A remote monitoring method for a construction machine that uses a communication line to monitor a construction machine located at a distance includes a failure determination step (S6) of receiving equipment status data indicating the status of a target equipment to be monitored in the construction machine via the communication line, and determining whether a failure has occurred in the construction machine on the basis of the received equipment status data, and a failure cause primary and secondary analysis steps (S7, S8) of analyzing the failure cause of the construction machine on the basis of failure data related to the failure cause when it is determined that a failure has occurred in the construction machine in the failure determination step.SELECTED DRAWING: Figure 2

Description

The present invention relates to a distant monitoring method for a construction machine that monitors a distant construction machine using a communication line, and a distant monitoring system for the construction machine.

At the construction site, for example, construction machines including cranes and lifting machines for construction civil engineering such as construction elevators are installed to perform civil engineering and construction work, and temporary construction that serves as a base for activities at the construction site. The base is set up.

When the above-mentioned construction machine breaks down, the operator of the construction machine or the worker at the temporary base confirms the details of the failure, and then contacts the serviceman who inspects and repairs the construction machine and rushes to the service. It is a general response that the man takes the necessary measures.

Usually, the operator of the construction machine operates the construction machine to perform the required work. In addition, among the lifting machines for construction and civil engineering, cranes are often operated at high places, and construction elevators are frequently raised and lowered to transport materials brought to the construction site to high places. ing. For this reason, the operator of the construction machine, the worker of the temporary base, and the like may be delayed in noticing that the construction machine has failed.

As a means for dealing with such a problem, a distant monitoring system for monitoring a monitoring target using a communication line has been developed (see, for example, Patent Document 1). The distant monitoring system according to Patent Document 1 is applied for monitoring construction machinery, and even if there is a observer far from the place where the construction machine is used, the observer uses the monitoring terminal device to operate the construction machine. If it is monitored, it will be possible to determine whether or not a failure has occurred in the construction machine.

Japanese Unexamined Patent Publication No. 2006-33441

However, when the remote monitoring system according to Patent Document 1 is applied to a construction machine, even if the observer has some knowledge about the construction machine, he / she does not necessarily have abundant knowledge about the causal relationship between the failure and the cause of the failure. Since it is not always possessed, the cause of the failure cannot be accurately estimated, and the problem that the response is delayed still remains.

The present invention has been made in view of the above problems, and it is possible to accurately determine whether or not a failure has occurred in a construction machine located far away, and to accurately estimate the cause of the failure. It is an object of the present invention to provide a method for remote monitoring of construction machinery and a remote monitoring system for construction machinery.

The characteristic configuration of the remote monitoring method for construction machinery according to the present invention for solving the above problems is
It is a distant monitoring method for construction machinery that monitors distant construction machinery using communication lines.
A failure that receives device status data indicating the status of the target device to be monitored by the construction machine via a communication line and determines whether or not a failure has occurred in the construction machine based on the received device status data. Judgment process and
When it is determined in the failure determination process that a failure has occurred in the construction machine, a failure cause analysis step for analyzing the failure cause of the construction machine based on the failure data related to the failure cause, and a failure cause analysis step.
To include.

According to the remote monitoring method of the construction machine of this configuration, the device status data indicating the status of the target device to be monitored in the construction machine located at a distance is received via the communication line, and based on the received device status data. Since it is designed to determine whether or not a failure has occurred in a construction machine, it is possible to accurately determine whether or not a failure has occurred in a construction machine located far away. In addition, when it is determined that a failure has occurred in a construction machine, the cause of the failure of the construction machine is analyzed based on the failure data of the failure of the construction machine and the cause of the failure, so that the construction is located far away. The cause of machine failure can be accurately estimated.

In the remote monitoring method for construction machinery according to the present invention,
It is preferable to include a recoverable determination step of determining whether or not the failure generated in the construction machine is a recoverable failure based on the failure cause estimated by the analysis in the failure cause analysis step.

According to the remote monitoring method of the construction machine having this configuration, it is determined whether or not the failure occurring in the construction machine is a recoverable failure based on the failure cause estimated by the analysis in the failure cause analysis process. If it is determined that recovery is possible, for example, contact a service person or make arrangements such as procuring replacement parts so that necessary measures can be taken for recovery. If it is determined that it is not possible, it is possible to promptly decide what to do next, such as reviewing the work process or making arrangements such as procuring alternative construction machinery. Appropriate measures can be taken promptly accordingly.

In the remote monitoring method for construction machinery according to the present invention,
Includes a remote support operation step of performing a support operation necessary for recovery from a failure via a communication line when it is determined in the recoverability determination process that the failure that occurred in the construction machine is a recoverable failure. Is preferable.

According to the remote monitoring method of the construction machine of this configuration, when it is judged that the failure that occurred in the construction machine is a recoverable failure in the recoverability judgment process, the support operation necessary for recovery from the failure is performed on the communication line. The remote support operation process performed via is carried out. As a result, skilled engineers with advanced expertise and skills that enable quick recovery from a failure can communicate with skilled engineers who are far away, even if they are not near the construction machine where the failure occurred. It is possible to carry out the support operation necessary for recovery from the failure through the above, and it is possible to recover from the failure quickly and surely.

The characteristic configuration of the remote monitoring system for construction machinery according to the present invention for solving the above problems is
A distant monitoring system for construction machinery that monitors distant construction machinery using communication lines.
A data acquisition means for acquiring device status data indicating the status of the target device to be monitored in the construction machine, and
A failure determination unit that receives the device status data acquired by the data acquisition means via a communication line and determines whether or not a failure has occurred in the construction machine based on the received device status data.
When the failure determination unit determines that a failure has occurred in the construction machine, the failure cause analysis unit that analyzes the failure cause of the construction machine based on the failure data related to the failure cause,
To prepare for.

According to the remote monitoring system of the construction machine of this configuration, the device status data indicating the status of the target device to be monitored in the construction machine is acquired by the data acquisition means, and the acquired device status data is failed via the communication line. The judgment unit receives it, and the failure judgment unit determines whether or not a failure has occurred in the construction machine based on the received equipment status data. As a result, it is possible to accurately determine whether or not a failure has occurred in a construction machine located far away. In addition, when the failure judgment department determines that a failure has occurred in a construction machine, the failure cause analysis department analyzes the cause of the failure of the construction machine based on the failure data related to the failure of the construction machine and the cause of the failure. Has been done. This makes it possible to accurately estimate the cause of failure of construction machinery located far away.

In the remote monitoring system for construction machinery according to the present invention
It is preferable to include a recoverable determination unit that determines whether or not the failure that occurred in the construction machine is a recoverable failure based on the failure cause estimated by the analysis by the failure cause analysis unit.

According to the remote monitoring system of the construction machine of this configuration, the recoverable judgment unit determines whether or not the failure that occurred in the construction machine is a recoverable failure based on the failure cause estimated by the analysis by the failure cause analysis unit. Judged by. If it is determined that recovery is possible, for example, contact a service person or make arrangements such as procuring replacement parts so that necessary measures can be taken for recovery. If it is determined that it is not possible, it is possible to promptly decide what to do next, such as reviewing the work process or making arrangements such as procuring alternative construction machinery. Appropriate measures can be taken promptly accordingly.

In the remote monitoring system for construction machinery according to the present invention
When the recoverable determination unit determines that the failure that occurred in the construction machine is a recoverable failure, it is possible to provide a remote support operation means for performing the support operation necessary for recovery from the failure via a communication line. preferable.

According to the remote monitoring system of the construction machine of this configuration, when the recoverable judgment unit determines that the failure that occurred in the construction machine is a recoverable failure, the support operation necessary for recovery from the failure is the communication line. It is carried out by remote support operation means via. As a result, it is possible to recover from a failure quickly and reliably without relying on a skilled engineer with advanced specialized knowledge and skills that enables quick recovery from a failure.

FIG. 1 is a block diagram of a remote monitoring system for construction machinery according to the first embodiment of the present invention. FIG. 2 is a flowchart showing the processing content of the distance monitoring using the distance monitoring system of the construction machine according to the first embodiment of the present invention. FIG. 3 is a block diagram of a remote monitoring system for construction machinery according to the second embodiment of the present invention. FIG. 4 is a flowchart showing the processing content of the distance monitoring using the distance monitoring system of the construction machine according to the second embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the drawings. In the following embodiment, among the construction machines used for civil engineering / construction work at a construction site, a jib crane, a construction elevator, and other construction civil engineering lifting machines will be described as an example. However, the present invention is not intended to be limited to the configurations described in the embodiments and drawings described below.

[First Embodiment]
FIG. 1 shows a block diagram of a remote monitoring system for construction machinery according to the first embodiment of the present invention. Further, FIG. 2 shows a flowchart showing the processing content of the distance monitoring using the distance monitoring system of the construction machine according to the first embodiment of the present invention.

<Overall configuration>
The construction machine remote monitoring system 1A shown in FIG. 1 is installed at a remote monitoring unit 2 attached to a control panel (not shown) installed to control the construction machine and at a temporary base located far from the construction machine. The base communication unit 3 is provided.

<Distant monitoring unit>
The remote monitoring unit 2 includes an analog signal input unit 4, an analog signal output unit 5, a digital signal input unit 6, a digital signal output unit 7, a built-in memory card 8, and a LAN port 9, and is a target to be monitored by a construction machine. It functions as a data acquisition means for acquiring device status data indicating the device status.

Examples of the target device to be monitored in the construction machine include a cargo handling device, a swivel device, a control device, and the like (all not shown).

As a cargo handling device for construction machinery, for example, in the case of a winch device installed in a jib crane, a load sensor is used to detect the load of a suspended load during cargo handling work. Further, in the case of a rack and pinion drive type elevating device installed in a construction elevator, a speed sensor is used to detect the elevating speed. In construction machinery, for example, when performing linear position control of a mechanically actuated portion, a position sensor such as a limit switch or a proximity switch for detecting the position of the mechanically actuated portion is used. An electric motor is used as a drive source in a winch device, an elevating device, a swivel device, etc. of a construction machine, and the electric motor is equipped with a square position sensor (rotary encoder). Various detection signals from the sensors 11 including the load sensor, the speed sensor, the position sensor, and the angular position sensor are sent to the analog signal input unit 4 in the remote monitoring unit 2.

The inverter 12 is incorporated in the drive circuit of the electric motor which is the drive source of the winch device, the elevating device, the swivel device, and the like in the construction machine. The inverter 12 changes both the voltage and the frequency with respect to the electric motor to change the rotation speed of the electric motor steplessly. The signal from the inverter 12 is converted into a predetermined communication protocol that can be communicated by the protocol converter 17 and then sent to the analog signal input unit 4. On the other hand, the signal sent from the analog signal output unit 5 to the inverter 12 is similarly converted into a predetermined communication protocol that can be communicated by the protocol converter 17 on the way.

As a control device for construction machinery, for example, a programmable controller (hereinafter referred to as "PLC") 13 that sequentially advances each stage of control according to a predetermined order or procedure, and an electric circuit for realizing control by the PLC 13. Examples include those composed of the required relays 14, 15 and 16 incorporated in. Here, as the electric circuit, for example, those related to various electric motors installed in construction machinery, those related to electrical components such as lighting, alarms, instruments, indicator lights, and electromagnetic waves provided in hydraulic circuits and pneumatic circuits. Examples include those related to valves and the like. In the present embodiment, the operation element relay 14, the failure element relay 15, and the alert / recovery element relay 16 are assumed as the required relays 14, 15, and 16 incorporated in the electric circuit. The operation element relay 14 is a relay that functions in the actual operation of the construction machine. The fault element relay 15 is a relay that has failed because there is no response to the ON / OFF command signal from the PLC 13. The alert / recovery element relay 16 is a relay that functions at the time of recovery by changing the program of the PLC 13 by remote control, which will be described later, instead of the faulty relay (failure element relay 15).

A remote wireless router 21 for transmitting and receiving data using wireless communication is wiredly connected to the LAN port 9 in the remote monitoring unit 2. The distant monitoring unit 2 is wirelessly connected to the carrier network 22, which is a telecommunications carrier's own network, via the distant wireless router 21, and is also wirelessly connected to the Internet network 23 via the carrier network 22. Further, the remote monitoring unit 2 is made accessible from the remote wireless router 21 to the cloud server 24 virtually provided on the Internet network 23 via the carrier network 22 and the Internet network 23.

A switching hub 25 that switches to selectively send data for each designated destination is provided between the LAN port 9 and the remote wireless router 21. A camera base station 26 is wiredly connected to the switching hub 25, and a camera with a microphone 27 is wirelessly connected to the camera base station 26 so that data can be transmitted. Here, the camera 27 with a microphone is installed in the construction machine so that, for example, the winch device can be imaged and the sound emitted from the winch device can be collected at the same time.

<Base communication unit>
The base communication unit 3 includes an FTP server 31, a Web server 32, and a terminal device 33. The FTP server 31 transmits and receives files using a communication protocol (FTP) for transferring files on a network, and the Web server 32 provides information in response to a request from a client. .. The FTP server 31 and the Web server 32 are each wiredly connected to the base wireless router 35 via the switching hub 34. The terminal device 33 also serves as a monitoring computer and a remote support operation means, and is wirelessly connected to the base wireless router 35. Examples of the terminal device 33 include a personal computer terminal (PC terminal) 36, a touch panel operation type terminal (tablet terminal) 37, and a mobile phone 38 such as a smart phone.

The monitoring process of the construction machine using the remote monitoring system 1A configured as described above will be described below using the flowchart shown in FIG. The symbol "S" in FIG. 2 represents a step.

<Equipment status data acquisition process: S1>
First, the remote monitoring unit 2 captures various detection signals from the sensors 11, signals from the inverter 12, and signals from the PLC 13 via the analog signal input unit 4, and also captures the signals from the operating element relay 14 and the signals from the operating element relay 14. Signals from the fault element relay 15 are each captured via the digital signal input unit 6, and the captured signals are device status data (sensor detection data, inverter status data, PLC) indicating the status of the target device to be monitored by the construction machine. It is stored in the built-in memory card 8 as status data, operating element relay status data, and fault factor relay status data), and is sent from the LAN port 9 to the distant wireless router 21 via the switching hub 25. Further, the remote monitoring unit 2 captures the camera image signal from the microphone-equipped camera 27 and the microphone sound collection signal via the camera base station 26, respectively, and captures the captured signals in the state of the target device to be monitored in the construction machine. The device status data (camera image data, microphone sound collection data) to be shown is sent to the remote wireless router 21 via the switching hub 25.

<Equipment status data transmission process: S2>
Various data captured in the remote monitoring unit 2, that is, sensor detection data, inverter status data, PLC status data, operating element relay status data, fault element relay status data, camera image data, and microphone sound collection data are remote wireless. Data is transmitted from the router 21 to the carrier network 22 (Internet network 23). Of the data transmitted to the carrier network 22 (Internet network 23), the camera image data is temporarily stored in the cloud server 24.

<Device status data reception process: S3>
The base communication unit 3 is connected to the carrier network 22 (Internet network 23) via the base radio router 35, and has sensor detection data, inverter status data, PLC status data, operating element relay status data, fault element relay status data, and the like. In addition to receiving the microphone sound collection data, the cloud server 24 is accessed to receive the camera image data stored in the cloud server 24.

<Event / logging file and visualization process: S4>
The plurality of device status data received by the base communication unit 3 are associated with the time information by the FTP server 31 and filed (event / logging file), and are visualized by the Web server 32.

<Device status data provision process: S5>
A plurality of device status data stored in the FTP server 31 and the Web server 32 are provided to the terminal device 33 via the switching hub 34 and the base wireless router 35 in response to a request from the terminal device 33.

<Failure judgment process: S6>
The observer who operates the terminal device 33 determines whether or not a failure has occurred in the construction machine based on the provided plurality of device state data. For example, if even one of the plurality of device status data shows an abnormality, it is determined that the construction machine has failed. Specifically, for example, when it is determined that the winding operation of the wire rope is disturbed even a little based on the image data of the winch device from the camera 27 with a microphone, the wire rope winding phenomenon (the wire rope random winding phenomenon). It is determined that a failure) has occurred. It should be noted that the present invention is not limited to this example, and even if one of the plurality of equipment status data shows an abnormality, it is not immediately determined that a failure has occurred in the construction machine, and two of them are used. When the above equipment state data shows an abnormality, it may be determined that a failure has occurred in the construction machine. Specifically, in the image data from the camera with microphone 27, the winding operation of the wire rope is slightly disturbed, but when the microphone sound collection data from the camera with microphone 27 does not show any abnormality, When both the image data from the camera with microphone 27 and the microphone sound collection data show an abnormality without immediately determining that the wire rope random winding phenomenon (failure) has occurred, the wire rope random winding phenomenon (failure) occurs. ) Has occurred. If it is determined in the failure determination step (S6) that no failure has occurred in the construction machine (No in S6), the process returns to S1 of the main flow and is executed again in order from S1 of the main flow.

Further, as another example of a failure of a construction machine, the indicator light is turned on even though the ON / OFF command signal is transmitted from the PLC 13 to the operation element relay 14 incorporated in the electric circuit for turning on / off the indicator light. / If it does not turn off, it is judged that the electric circuit of the indicator light has a failure.

In the failure determination step (S6), device status data indicating the status of the target device to be monitored by the construction machine located at a distance is received via the communication line, that is, the carrier network 22 (Internet network 23), and received. Since it is determined whether or not a failure has occurred in the construction machine based on the equipment status data, it is possible to accurately determine whether or not a failure has occurred in the construction machine located far away.

<Failure cause primary analysis process: S7>
If it is determined in the failure determination process (S6) that a failure has occurred in the construction machine, the cause of the failure of the construction machine can be determined based on the failure data related to the cause of the failure in cooperation with an expert engineer waiting at the temporary base. Primary analysis. For example, in the failure data regarding the cause of failure, the first row (first layer) for winding the wire rope around the take-up drum is strong and properly wound as the most probable cause of the random winding phenomenon of the wire rope in the winch device. If it is shown that this is not the case, it is presumed that this is the cause of the random winding phenomenon of the wire rope this time. The failure data related to the cause of failure includes, for example, data showing a causal relationship between a failure that occurred in the past in the construction machine used and the cause of the failure, and a failure obtained by simulation of the construction machine and the cause of the failure. Examples include data showing the causal relationship between the above and data obtained by diverting data showing the causal relationship between a failure related to a construction machine different from the one used and the cause of the failure.

Further, as another example of failure cause analysis of construction machinery, the most probable cause of failure of the electric circuit of the indicator lamp is the malfunction of the operation element relay 14 related to turning on / off the indicator lamp. If it is shown in the failure data, it is presumed that this is the cause of this failure.

In the failure cause primary analysis step (S7), the cause of the failure of the construction machine is analyzed based on the failure data of the failure of the construction machine and the cause of the failure. Therefore, the cause of the failure of the construction machine located far away Can be estimated accurately.

<Secondary analysis process of cause of failure: S8>
Cause of failure Based on more detailed equipment status data of equipment related to the cause of failure of construction machinery analyzed in the primary analysis process (S7), the cause of failure in cooperation with an expert engineer waiting at the temporary base. The cause of the failure is investigated by performing a secondary analysis. For example, a field service worker moves the installation position of the camera 27 with a microphone so that the winding drum portion of the wire rope in the winch device can be imaged more clearly and the sound emitted from the winding drum portion can be collected more clearly. , And / or instruct the operator. Then, based on the clearer image data of the take-up drum portion and / or the clearer microphone sound collection data, the cause of the failure (random winding phenomenon of the wire rope) is estimated in the failure cause primary analysis step (S7). Find out that the first row (first layer) of the wire rope to be wound around the winding drum is strong and not properly wound.

Further, for example, on a trial basis, an ON / OFF command from the PLC 13 is bypassed by the operation element relay 14 related to turning on / off the indicator light and passed through another relay (for example, the alert / recovery element relay 16). By outputting the signal, the cause of the failure of the electric circuit of the indicator light is the malfunction of the operation element relay 14 related to the turning on / off of the indicator light, which was estimated in the failure cause primary analysis step (S7). To find out.

<Recoverable judgment process: S9>
Recoverability data indicating the recoverability of the cause of the failure based on the cause of the failure that was first analyzed in the primary analysis step of the cause of the failure (S7) and that was determined by the secondary analysis in the secondary analysis step of the cause of the failure (S8). By referring to, it is determined whether or not the failure that occurred in the construction machine is a failure that can be temporarily recovered. For example, regarding the random winding phenomenon of the wire rope, when the cause of the investigation investigated is that the first row (first layer) of the wire rope to be wound on the winding drum is strong and not wound properly. In the recoverability data, as a recovery measure for the cause of the failure, if the rotation speed of the wire rope when the wire rope is wound in the first row (first layer) of the take-up drum is less than the predetermined rotation speed, the wire rope When it is shown that the turbulent winding phenomenon is resolved and the original state is restored, it is determined that the failure that occurred in the construction machine is a temporary recoverable failure. On the other hand, regarding the random winding phenomenon of the wire rope, when the cause of the failure investigated is the damage of the bearing device that rotatably supports the take-up drum, the recoverability data indicates that the bearing device is replaced. If it is indicated that the winch device needs to be stopped for a certain period of time, it is determined that the failure that occurred in the construction machine is a temporary irrecoverable failure. If it is determined that the failure cannot be temporarily recovered, this flow is terminated.

Further, for example, regarding the failure of the electric circuit of the indicator light, when the cause of the failure investigated is a malfunction of the operation element relay 14 related to turning on / off the indicator light, the cause of the failure is shown in the recoverability data. As a recovery measure against this, the indicator lamp can be turned on / off by bypassing the malfunctioning operation element relay 14 and outputting an ON / OFF command signal from the PLC 13 via the alert / recovery element relay 16. If indicated, it is determined that the failure that occurred in the construction machine is a temporary recoverable failure. On the other hand, regarding the failure of the electric circuit of the indicator light, when the cause of the failure investigated is the damage of the indicator light, in the recoverability data, the operation of the construction machine is stopped for a certain period of time to replace the indicator light. If it is indicated that it is necessary to make it, it is judged that the failure that occurred in the construction machine is a temporary irrecoverable failure.

In the recoverable determination step (S9), it is determined whether or not the failure that occurred in the construction machine is a recoverable failure based on the investigated cause of the failure, and therefore it is determined that the recovery is possible. In that case, for example, if it is determined that restoration is impossible by contacting a service person or procuring replacement parts so that necessary measures can be taken for restoration. For example, it is possible to promptly decide what to do next, such as reviewing the work process and making arrangements such as procuring alternative construction machinery, and it is possible to promptly take appropriate measures according to the situation. ..

<Remote support operation process: S10 to S12>
If it is determined in the recoverable determination step (S9) that the failure that occurred in the construction machine is a temporary recoverable failure, the support operation necessary for temporary recovery from the failure is performed via the carrier network 22 (Internet network 23). To carry out. For example, in order to suppress the random winding phenomenon of the wire rope and return it to the original state, the inverter 12 is remotely controlled by the terminal device 33 via the carrier network 22 (Internet network 23) (S10). That is, an operation signal that changes both the voltage and frequency of the electric motor so that the rotation speed of the drum when the wire rope is wound around the first row (first layer) of the take-up drum is equal to or less than the predetermined rotation speed is transmitted. , The terminal device 33 transmits the signal to the inverter 12 via the carrier network 22 (Internet network 23), and the support operation is performed remotely (S11 to S12).

Further, for example, when the electric circuit of the indicator light is made to function, the PLC 13 is remotely controlled by the terminal device 33 via the carrier network 22 (Internet network 23) (S10). That is, the terminal device 33 sends the operation signal for changing the program of the PLC 13 so that the ON / OFF command signal is output to the alert / recovery element relay 16 by bypassing the malfunctioning operation element relay 14. It is transmitted to the PLC 13 via the (Internet network 23) to perform the support operation remotely (S11 to S12).

In the remote support operation steps (S10 to S12), the support operation necessary for recovery from the failure is performed via the communication line, that is, the carrier network 22 (Internet network 23), so that quick recovery from the failure is possible. Even if a skilled technician with a high degree of expertise and skill is not near the construction machine where the failure occurred, a skilled technician who is far away can perform the support operation necessary for recovery from the failure via the communication line. Can be carried out, and it is possible to recover from a failure quickly and surely.

[Second Embodiment]
FIG. 3 shows a block diagram of a remote monitoring system for construction machinery according to a second embodiment of the present invention. Further, FIG. 4 shows a flowchart showing the processing contents of the remote monitoring system for construction machinery according to the second embodiment of the present invention. In the second embodiment, the same or similar ones as those in the first embodiment are designated by the same reference numerals in the drawings, and detailed description thereof will be omitted. The following is specific to the second embodiment. I will mainly explain the part.

In the distance monitoring system 1B shown in FIG. 3, the storage device 41 in the terminal device 33 has a distance monitoring program created according to the algorithm shown in the flowchart of FIG. 4, failure data related to the above-mentioned failure cause, and recovery for the failure cause. Recoverability data indicating the possibility, data related to support operations required for temporary recovery from a failure, and other data required for arithmetic processing are stored. Then, the central processing unit (CPU) 42 reads and executes the remote monitoring program stored in the storage device 41, so that the CPU 42 has a failure determination unit 51, a failure cause analysis unit 52, and a recoverable determination unit 53. , And the functions of the remote support operation unit 54 are realized.

The monitoring process of the construction machine using the remote monitoring system 1B shown in FIG. 3 will be described below with reference to the flowchart shown in FIG. The symbol "S" in FIG. 4 represents a step.

<Equipment status data acquisition process: S21>
First, the remote monitoring unit 2 captures various detection signals from the sensors 11, signals from the inverter 12, and signals from the PLC 13 via the analog signal input unit 4, and also captures the signals from the operating element relay 14 and the signals from the operating element relay 14. Signals from the fault element relay 15 are each captured via the digital signal input unit 6, and the captured signals are device status data (sensor detection data, inverter status data, PLC) indicating the status of the target device to be monitored by the construction machine. It is stored in the built-in memory card 8 as status data, operating element relay status data, and fault factor relay status data), and is sent from the LAN port 9 to the distant wireless router 21 via the switching hub 25. Further, the remote monitoring unit 2 captures the camera image signal from the microphone-equipped camera 27 and the microphone sound collection signal via the camera base station 26, respectively, and captures the captured signals in the state of the target device to be monitored in the construction machine. The device status data (camera image data, microphone sound collection data) to be shown is sent to the remote wireless router 21 via the switching hub 25.

<Equipment status data transmission process: S22>
Various data captured in the remote monitoring unit 2, that is, device status data, that is, sensor detection data, inverter status data, PLC status data, operating element relay status data, fault element relay status data, camera image data, and microphone sound collection. The data is transmitted from the remote wireless router 21 to the carrier network 22 (Internet network 23). Of the data transmitted to the carrier network 22 (Internet network 23), the camera image data is temporarily stored in the cloud server 24.

<Device status data reception process: S23>
The base communication unit 3 is connected to the carrier network 22 (Internet network 23) via the base radio router 35, and has sensor detection data, inverter status data, PLC status data, operating element relay status data, fault element relay status data, and the like. In addition to receiving the microphone sound collection data, the cloud server 24 is accessed to receive the camera image data stored in the cloud server 24.

<Event / logging file creation and visualization process: S24>
The plurality of device status data received by the base communication unit 3 are associated with the time information by the FTP server 31 and filed (event / logging file), and are visualized by the Web server 32.

<Device status data provision process: S25>
A plurality of device status data stored in the FTP server 31 and the Web server 32 are provided to the terminal device 33 via the switching hub 34 and the base wireless router 35 in response to a request from the terminal device 33.

<Failure judgment process: S26>
The failure determination unit 51 determines whether or not a failure has occurred in the construction machine based on the provided plurality of device state data. Specific examples include, as described above, a random winding phenomenon of a wire rope and a failure of an electric circuit of an indicator lamp.

<Failure cause analysis process: S27>
When it is determined in the failure determination step (S26) that a failure has occurred in the construction machine, the failure cause analysis unit 52 reads the failure data related to the failure cause stored in the storage device 41, and based on the read failure data, Analyze the cause of construction machine failure. As a specific example, as described above, in the case of the random winding phenomenon of the wire rope, the first row (first layer) for winding the wire rope around the winding drum is strong and the wire rope is not wound properly. It is presumed that there is a failure of the electric circuit of the indicator lamp, and it is presumed that the cause is a malfunction of the operation element relay 14 related to turning on / off the indicator lamp.

<Recoverable judgment process: S28>
The recoverable determination unit 53 refers to the recoverability data indicating the recoverability for the failure cause stored in the storage device 41 based on the failure cause estimated in the failure cause analysis step (S27). Determine whether the failure that occurred in the construction machine is a failure that can be temporarily recovered. As a specific example, as described above, in the case of the random winding phenomenon of the wire rope, the cause of the failure is that the first row (first layer) of the wire rope to be wound on the winding drum is strong and is not wound properly. If this is the case, it is determined that the failure that occurred in the construction machine is a failure that can be temporarily recovered, and if the cause of the failure is damage to the bearing device that supports the take-up drum, it is determined that the failure cannot be temporarily recovered. .. On the other hand, in the case of a failure of the electric circuit of the indicator light, if the cause of the failure is a malfunction of the operation element relay 14 related to turning on / off the indicator light, it is determined that the failure occurring in the construction machine is a failure that can be temporarily recovered. However, when the damage to the indicator light is the cause of the failure, it is determined that the failure cannot be temporarily recovered.

<Remote support operation process: S29 to S31>
The remote support operation unit 54 refers to the data related to the support operation required for temporary recovery from the failure stored in the storage device 41, determines the support operation required for temporary recovery for the current failure, and determines the support operation required for the temporary recovery. The remote control signal related to the above is transmitted to the remote monitoring unit 2 via the carrier network 22 (Internet network 23) to perform the remote control (S29 to S31). As a specific example, as described above, when suppressing the random winding phenomenon of the wire rope and returning it to the original state, the inverter 12 is remotely operated via the carrier network 22 (Internet network 23), and the first winding drum is used. Both the voltage and frequency for the electric motor are changed so that the drum rotation speed when the wire rope is wound around the row (first layer) is equal to or less than the predetermined rotation speed. Further, when the electric circuit of the indicator light is to function, the PLC 13 is remotely controlled via the carrier network 22 (Internet network 23), and the ON / OFF command signal is alerted / restored by bypassing the malfunctioning operation element relay 14. Change the PLC program so that it is output to the element relay 16.

The distance monitoring system 1B of the construction machine of the second embodiment can also obtain basically the same effect as the distance monitoring system of the first embodiment.

The distance monitoring method for construction machinery and the distance monitoring system for construction machinery of the present invention have been described above based on a plurality of embodiments, but the present invention is not limited to the configuration described in the above embodiment. The configuration can be changed as appropriate without departing from the purpose.

The distant monitoring method for construction machinery and the distant monitoring system for construction machinery of the present invention are used for distant monitoring of construction machinery including lifting machinery for construction and civil engineering such as jib cranes and construction elevators from a distance using a communication line. It is available.

1A, 1B Distance monitoring system for construction machinery 2 Distance monitoring unit (data acquisition means)
33 Terminal equipment (remote support operation means)
51 Failure Judgment Unit 52 Failure Cause Analysis Department 53 Recoverable Judgment Unit

Claims (6)

It is a distant monitoring method for construction machinery that monitors distant construction machinery using communication lines.
A failure that receives device status data indicating the status of the target device to be monitored by the construction machine via a communication line and determines whether or not a failure has occurred in the construction machine based on the received device status data. Judgment process and
When it is determined in the failure determination process that a failure has occurred in the construction machine, a failure cause analysis step for analyzing the failure cause of the construction machine based on the failure data related to the failure cause, and a failure cause analysis step.
A method of remote monitoring of construction machinery, including. The first aspect of claim 1 includes a recoverable determination step of determining whether or not a failure occurring in the construction machine is a recoverable failure based on the failure cause estimated by the analysis in the failure cause analysis step. Distance monitoring method for construction machinery. Includes a remote support operation step of performing a support operation necessary for recovery from a failure via a communication line when it is determined in the recoverability determination process that the failure that occurred in the construction machine is a recoverable failure. The remote monitoring method for construction machinery according to claim 2. A distant monitoring system for construction machinery that monitors distant construction machinery using communication lines.
A data acquisition means for acquiring device status data indicating the status of the target device to be monitored in the construction machine, and
A failure determination unit that receives the device status data acquired by the data acquisition means via a communication line and determines whether or not a failure has occurred in the construction machine based on the received device status data.
When the failure determination unit determines that a failure has occurred in the construction machine, the failure cause analysis unit that analyzes the failure cause of the construction machine based on the failure data related to the failure cause,
A remote monitoring system for construction machinery. The construction according to claim 4, further comprising a recoverable determination unit that determines whether or not the failure that occurred in the construction machine is a recoverable failure based on the failure cause estimated by the analysis by the failure cause analysis unit. Remote monitoring system for machinery. A claim comprising a remote support operation means for performing a support operation necessary for recovery from a failure via a communication line when the recoverable determination unit determines that the failure that has occurred in the construction machine is a recoverable failure. The remote monitoring system for construction machinery according to 5.

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