JP5213062B2 - Low voltage warning method for work machines - Google Patents

Description

  The present invention relates to a low voltage warning method in a work machine equipped with an in-vehicle controller that can communicate with electric power supplied from a battery.

  Dynamic data on work machines is provided by a work machine remote operation management system that enables two-way communication between the in-vehicle controller of the work machine and a remote management unit, and allows two-way communication between the management unit and the terminal device. Is provided to a terminal device via a management unit (see, for example, Patent Document 1).

  In addition, there is a technology for displaying the generation of caution data such as “abnormal charge voltage drop” and the date of occurrence thereof on the machine monitor screen of the work machine (see, for example, Patent Document 2).

JP 2008-117117 A (page 3-4, FIG. 2) JP2003-203127A (6th page, FIG. 5)

  Although the above prior art can notify the state of the battery voltage to the remote customer or service person from the in-vehicle controller of the work machine via the management unit and the terminal device when the battery voltage is abnormally reduced, the work machine is small. When the battery capacity is small, such as in the case of the above, the fluctuation of the battery voltage is large, the battery voltage may drop below the specified voltage even during normal operation, and there is a risk of erroneously detecting an abnormal drop in battery voltage .

  The present invention has been made in view of the above points, and in the case where an abnormal decrease in battery voltage is warned to a remote customer or a service person by a terminal device from an in-vehicle controller of a work machine through a management unit, It is an object of the present invention to provide a low voltage warning method for a work machine that can appropriately determine and warn of an abnormal drop of the work.

  The present invention is capable of bidirectional communication with a work machine including a battery that is charged by receiving electric power from a generator driven by an engine and an in-vehicle controller that can communicate with the electric power supplied from the battery. In a work machine remote operation management system that provides a work device dynamic data to the terminal device via the management unit, the battery voltage of the work machine is specified. If the continuous operation time of the engine within a predetermined time is less than the specified time, the management unit that has acquired this state from the on-board controller of the work machine will serve as the terminal device of the person who maintains and manages the work machine. This is a low voltage warning method in a work machine that transmits a low voltage warning mail.

  According to the present invention, when the battery voltage of the work machine is less than the specified voltage, the management unit that acquires this state from the vehicle-mounted controller of the work machine maintains the terminal device of a remote customer or service person who maintains and manages the work machine By sending a low voltage warning mail to the battery, it is possible to prompt for battery replacement or charging. At that time, if the battery capacity is small, the battery voltage fluctuates greatly, and the battery voltage may drop below the specified voltage even during normal operation. By adding the condition that the low voltage warning mail is sent only when the voltage is less than the specified voltage and the continuous operation time of the engine within the specified time is less than the specified time, and taking into account the charging time by continuous operation, Low voltage false detection can be prevented, and an abnormal drop in battery voltage can be appropriately judged and warned.

It is a flowchart which shows one Embodiment of the low voltage warning method in the working machine which concerns on this invention. It is a schematic diagram of the work machine remote operation management system to which the warning method is applied. It is a block diagram of a system same as the above. It is a block diagram of the work machine side controller of a system same as the above.

  Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS.

  FIG. 2 shows an outline of the work machine remote operation management system 10. The work machine remote operation management system 10 performs dynamic management of the work machine 11 at a remote location using wireless communication. A dynamic management controller (to be described later) having a wireless communication function and a position monitoring function by a global positioning system satellite (hereinafter referred to as GPS satellite 12) is provided. The work machine 11 shown in FIG. 2 is a hydraulic excavator, but the work machine 11 may be a bulldozer or a loader.

  The movement management controller of the work machine 11 is configured to be able to communicate with the management unit 15 via the relay station 13 and the wireless carrier network 14. The wireless carrier network 14 is a mobile phone circuit network that connects the controller for dynamic management of the work machine 11 and the management unit 15 by using both mobile phone communication and satellite communication.

  The management unit 15 is installed in the manufacturer that produces the work machine 11. The management unit 15 is configured to be able to communicate with a customer terminal device 17 as a terminal device via the Internet line network 16, and the manufacturer. An in-house terminal device 19 as a terminal device is configured to be communicable via the affiliated intranet network 18.

  The management unit 15 receives and stores vehicle information and movement data (that is, movement data, warning information, and position information) transmitted from the movement management controller of the work machine 11 through wireless communication, and a series of information aggregates. The information is reflected on a certain web site, and information is provided to the customer and the manufacturer's in-house or dealer service person through the Internet network 16 or the intranet network 18 via the Web (Web) or e-mail.

  The customer terminal device 17 or the in-house terminal device 19 is accessed by the customer or service person through the Internet line network 16 or the intranet line network 18 and accessing the management unit 15 through the web browser or e-mail. A personal computer (hereinafter simply referred to as a “personal computer”) for browsing dynamic data and warning information, but also includes a mobile phone.

  Dynamic data includes operating information (operating time, remaining fuel level, etc.), machine information (engine speed, hydraulic equipment status, etc.), warning information (unapproved key insertion, battery low voltage detection, engine oil pressure abnormality detection, etc.), Includes maintenance information (oil change time, filter change time, etc.).

  Warning information is information that warns by detecting abnormalities that may cause serious damage to the vehicle, such as an engine start restriction function by inserting an unapproved key, a decrease in battery charge voltage, a decrease in engine oil pressure, etc. It is.

  FIG. 3 shows the configuration of the management unit 15 side in the work machine remote operation management system 10, and in particular, vehicle information (vehicle name (unit information), model, construction machine body serial number, etc.) of the work machine 11, dynamic data ( Operating information, machine information, maintenance information), warning information and position information (map display by GPS satellite 12), etc. are transmitted from work machine 11 to remote management unit 15 by wireless communication, and received by management unit 15 A management unit that manages the work machine 11 on the homepage using a personal computer connected to the Internet or an intranet by the customer or serviceman by reflecting the information on the website (member site) and providing it to the customer or serviceman 15 shows the application on the 15 side, the management unit communication unit 21, the data connection processing unit 22, the database 23, the mail distribution unit 24, and the network connection information. And a processing unit 25.

  The management unit communication unit 21 is a communication device that can use the wireless carrier network 14, that is, a data reception unit 27 for performing data communication with the dynamic management controller 26 as an in-vehicle controller of the work machine 11 via the wireless carrier network 14. A data transmission unit 28 and an information control unit 29 are provided.

  In the work machine 11, the communication dynamic management controller 26 and the machine control controller 30 for controlling various devices of the machine are connected by an in-vehicle electronic device network. These controllers 26 and 30 will be described later in detail.

  In addition, the data connection processing unit 22 of the work machine remote operation management system 10 uses a standardized technology such as an XML data format to allow web systems 22ws that allow computer systems of different languages to interact and exchange information between various systems. It has. That is, the data connection processing unit 22 uses a standardization technology such as XML (eXtensible Markup Language), for example, a dynamic management controller 26 of the work machine 11 and a customer terminal device 17 (customer personal computer 17pc, customer mobile phone 17ph) or It has a web server that controls data transmission / reception with the in-house terminal device 19 (in-house personal computer 19pc, in-house mobile phone 19ph) on the maintenance execution side (manufacturer's in-house and retail store).

  The customer personal computer 17pc and the customer mobile phone 17ph are both in an environment in which a website operated by the management unit 15 can be accessed via the Internet line network 16, and the customer mobile phone 17ph has a function of receiving and storing e-mails.

  Both the in-house PC 19pc and the in-house mobile phone 19ph are in an environment where the website operated by the management unit 15 can be accessed via the manufacturer's affiliated intranet network 18, and the in-house mobile phone 19ph can receive and store emails. have.

  The database 23 includes a vehicle database 31, a customer information database 32, and an in-house data update unit 33. The vehicle database 31 includes vehicle information (such as machine information) transmitted from the work machine 11 and dynamic data (operations). Information, maintenance information, etc.), warning information and location information are stored, and the customer information database 32 is supplied from the customer master via the in-house intranet network 18 and is sequentially updated by the in-house data update unit 33. Is saved. As will be described later, the information in each of the databases 31 and 32 is provided to the customer or service person in a stringed manner.

  The mail delivery unit 24 has a mail server for sending e-mails to customer mobile phones 17ph, customer personal computers 17pc and in-house mobile phones 19ph, and responds to vehicle information when warning information is sent from the work machine 11 side An email indicating that the warning information was received is sent to the customer, and if the parts replacement time is within the set range, an email notifying the customer corresponding to the vehicle information of the parts replacement time is sent. For this reason, the addresses of the customer mobile phone 17ph, the customer personal computer 17pc, and the in-house mobile phone 19ph to be transmitted are stored in the memory of the mail server.

  The network line information processing unit 25 is connected to the data connection processing unit 22 via the information control unit 34, and includes a customer information processing unit 35 and an in-house information processing unit 36 that manage the website. Data is exchanged with a personal computer 17pc and an in-house personal computer 19pc.

  As shown in FIG. 4, in the work machine 11, a dynamic management controller 26, an airframe control controller (machine ECM) 30, and fuel injection (injection amount, pressure, timing) of the engine 37 are passed through a governor. An engine controller (engine ECM) 38 for controlling and a monitor controller (monitor ECM) 39 for controlling a monitor which is a display device having an input function are connected by an in-vehicle electronic device network 40.

  The work machine 11 includes a generator 50 driven by the engine 37 and a battery 51 that is charged by receiving power from the generator 50. Operating power is supplied from the battery 51 to the dynamic management controller 26, the airframe control controller 30, the engine controller 38, and the monitor controller 39.

  The behavior management controller 26 can communicate by receiving power supplied from the battery 51 even when the engine key switch is OFF. On the other hand, other in-vehicle controllers such as the airframe control controller 30 operate by receiving power supply from the battery 51 when the engine key switch is on, and supply power from the battery 51 when the engine key switch is off. Blocked.

  As shown in FIG. 3, the position information of the work machine 11 can be confirmed on the customer personal computer 17 pc or the in-house personal computer 19 pc by the work machine remote operation management system 10 and is connected to the information control unit 34 of the management unit 15. The map information database 41 of the map information search site can also be confirmed on the customer's mobile phone 17ph or the in-house mobile phone 19ph of the service person, so it is useful for searching the position of the maintenance target vehicle such as parts replacement work site while moving .

  In addition, the software rewrite system 42 outside the work machine remote operation management system is connected to the web service 22ws of the data connection processing unit 22 of the work machine remote operation management system 10, and the same compatible data format is attached to the software rewrite system 42. Connected via the web service 42ws, the information database 43 as a database outside the work machine remote operation management system is connected via the web service 43ws of the same compatible data format attached to the information database 43. The repair work system 44 outside the work machine remote operation management system is connected via a compatible web service 44ws of the same data format attached to the repair work system 44, and is rented outside the work machine remote operation management system. System 45 is compatible with this rental system 45 Connected via the data format web service 45ws, the instruction acquisition intranet network 46 outside the work machine remote operation management system is connected to the instruction acquisition intranet network 46 in the same compatible data format. Connected via web service 46ws.

  The software rewriting system 42 includes a software rewriting file that rewrites the control software of the dynamic management controller 26 and the machine control controller 30 of the work machine 11, and uses the software rewriting function to control the software of the work machine 11 (Airframe control program) can be changed. For example, by rewriting the operation setting value in the machine control program for controlling the machine control controller 30 of the work machine 11, the engine speed, the hydraulic pump characteristics, and the like can be adjusted.

  The various information database 43 is a database storing customer basic information before update provided to the in-house data update unit 33, machine information about the work machine 11, repair history, parts order, sales company information, etc. A part replacement time management system is used to estimate the next part replacement time by using the information and determine whether or not the next part replacement time is within the set range. The in-house data update unit 33 updates the data related to the customers in the various information databases 43 and inputs them to the customer information database 32.

  The repair work system 44 is used to obtain data necessary for performing a repair work from the work machine remote operation management system 10.

  The rental system 45 is a system for managing inventory information and the like in the rental business of the work machine 11 and performing accounting processing for issuing an invoice. In addition to vehicle information (unit information), rental customer information and the like are stored. ing.

  The instruction acquisition intranet network 46 is an intranet network for acquiring a parts catalog and instruction manual of the work machine 11.

  In the management unit 15 and its surroundings in the work machine remote operation management system 10 shown in FIG. 3, data operating a website that is accessed from a customer personal computer 17pc and an in-house personal computer 19pc and is requested to obtain dynamic data. Web server of connection processing unit 22, internal database 23 for storing dynamic data acquired from work machine 11 through communication means and related data related to the dynamic data, and management server for managing internal database 23 And an external various information database 43 storing related data to be stored in the internal database 23, and a management server for managing the external various information database 43, the web of the data connection processing unit 22 The server retrieves the related data from the external information database 43 connected to itself and retrieves the internal data. Database and the dynamic data (dynamic data, warning information, maintenance information, etc.) stored in the internal database 23 together with related data (customer information) related to it are reflected on the website. Then, the data format of the data exchange via the web server is set to an XML data format, and at least the web server functions as a service requester and each server connected to the web server functions as a service provider.

  The management system of the management unit 15 is a technology that uses a so-called XML web service for the work machine remote operation management system 10 of the work machine 11. The XML web service is exchanged on the network by data exchange in the XML data format. A technology that links scattered applications. XML (eXtensible Markup Language) is one of the markup languages, and the biggest feature is that it is a language that can send and receive data between systems without depending on the platform of each system, and that the program can interpret. It can be used to send and receive data between servers.

  SOAP (Simple Object Access Protocol) is known as a communication protocol that can use an object in XML data format via a network (HTTP or the like that is generally used as a lower protocol can be used). Therefore, for example, in the network environment connected by HTTP, using SOAP, for example, by sending the XML data from the first server to the second server on the network, the second server performs processing, and after the processing The XML data can be returned to the first server, and if the website is operated by the first server, the acquired data can be reflected on the website.

  The service requester and the service provider are both concepts on the XML web service. The service requester is a source of XML data for requesting data (for example, the first server), and the service provider is the transmission of the data. A partner server that is the destination and performs processing described in the data and then returns the processed data to the service requester (for example, the second server).

  In the management unit 15, the web server of the data connection processing unit 22 functions as a service requester, and the management servers of the internal and external databases 23 and 43 connected thereto function as service providers. Therefore, the XML data format from the web server Each management server processes the command based on the command data, and returns the processed data to the web server. If the returned data is related data from the external information database 43, the web server transmits it as it is to the management server of the internal database 23 and stores it. If the returned data is dynamic data (dynamic data, warning information, maintenance information, etc.) from the internal database 23 and related data (customer information) attached to it, the web server will go to the website operated by itself. To reflect.

  Therefore, in this device, for example, when a customer or a service person wants to know the dynamic data of the work machine 11 owned or in charge, he / she accesses the website of the management unit 15 from his / her terminal and instructs the data acquisition request. Can be put out.

  In response to this instruction, the web server of the management unit 15 transmits the command data in the XML data format to the management server of the internal database 23. Therefore, the management server sends the XML of the desired work machine from the internal database 23. While taking out the dynamic data in the data format, the related data is also taken out and sent back to the web server. In the web server, dynamic data and related data are added to the web site and reflected on the website. Thereby, a customer or a service person can acquire dynamic data together with related data. When a customer or a service person connects his / her own database to his / her terminal, the dynamic data acquired from the website is in the XML data format, and can be directly imported into the database.

  Data exchange between the work machine 11 and the management unit 15 is also performed in the XML data format, and the work machine side data acquisition means is caused to function as a service provider. The software rewriting system 42, the repair service system 44, the rental system 45, and the instruction acquisition intranet network 46 that exchange data with the web server of the data connection processing unit 22 in the XML data format are the same as the various information databases 43. To act as a service provider.

  As described above, the application on the management unit 15 side in the work machine remote operation management system 10 uses the XML data format as the data format for data exchange with the web server of the data connection processing unit 22, and at least the web server is a service requester. In addition, since each server connected to the web server is made to function by the service provider, the dynamic data and the related data returned from the service provider are also in the XML data format. In addition, it is easy for the customer side or an external system to capture the data as it is via a web server.

  In other words, it is compatible with the XML data format, which is a standard format in the construction industry, and this XML data format is also a universal data format that extends to the whole world. Can pass. Furthermore, depending on the mode, it is possible to connect to an external system and allow the web server of the data connection processing unit 22 to function as a service requester so that the dynamic data acquired by the web server is directly taken into the external system. Is possible.

  Further, it is easy to increase the number of servers as service providers connected to the website of the management unit 15, and in this case, it is possible to increase the processing of the management system itself. On the other hand, since it is sufficient for the web server of the data connection processing unit 22 to function as a service requester, the burden on the management unit itself does not increase, and the effect of upgrading the apparatus can be obtained at a low cost while the mechanism is simple.

  That is, for system construction, it is not necessary to create each system configuration including cooperation with other systems as in the past, and only one web service of the cooperation connector, that is, the data connection processing unit 22, is created. Various other systems such as a software rewriting system 42, various information databases 43, a repair business system 44, a rental system 45, an intranet network 46 for obtaining instructions, and their web services 42ws, 43ws, 44ws, 45ws , 46ws can be easily linked, so it is easy to connect with each original interface and can be created at low cost.

  Furthermore, it is easy to add or modify another system after the work machine remote operation management system 10 is completed. For example, a software rewriting system 42, various information databases 43, a repair business system 44, a rental system 45, and an instruction acquisition intranet. Even if other systems such as the network 46 are linked, it is not necessary to develop a system for putting these other systems in the work machine remote operation management system 10, and the web services 42ws, By simply attaching 43ws, 44ws, 45ws, 46ws, another system can be added.

  A database 23 directly connected to the data connection processing unit 22 of the management unit 15 shown in FIG. 3, an externally connected external customer terminal device 17, an in-house terminal device 19, a map information database 41, a software rewriting system 42, various information database 43, repair business system 44 and rental system 45, manual acquisition intranet network 46, etc., constitutes sales and service support system 48 that centrally manages customer / work machine / visit information in management unit 15 doing.

  Next, FIG. 4 shows a dynamic management controller 26 which is a dynamic data management apparatus that controls data exchange inside and outside the work machine 11, and an airframe control controller 30 that controls various devices of the work machine 11. . The behavior management controller 26 and the airframe control controller 30 are connected by an in-vehicle electronic device network 40 such as a communication line.

  The dynamic management controller 26 is connected in parallel with an engine start circuit (not shown) to a main power supply circuit directly connected to a battery (not shown) of the work machine 11. Therefore, even if the engine key switch of the engine start circuit is turned off, the dynamic management controller 26 can be maintained in the operating state by receiving the supply of the main power unless the main power switch is turned off. On the other hand, the controller 30 for aircraft control is connected to the engine key switch circuit and interlocks with on / off of the engine key switch, unlike the controller 26 for behavior management.

  The airframe control controller 30 includes an arithmetic processing unit 52 and a storage unit 53. The arithmetic processing unit 52 is connected to the in-vehicle electronic device network 40 via a wired communication unit 54 and via an input / output signal processing unit 55. The engine controller (e.g., ECM) that controls fuel injection of the diesel engine, the pump controller (e.g., regulator) of the hydraulic circuit, and sensors are connected to various devices 56.

  The storage unit 53 stores vehicle information (car information, etc.) and setting data, and outputs a control signal to an engine controller, a pump controller, and the like based on the setting data in the storage unit 53. Further, the dynamic data and warning information captured by the machine control controller 30 is captured by the dynamic management controller 26 from the wired communication unit 54 via the in-vehicle electronic device network 40.

  The behavior management controller 26 includes an arithmetic processing unit 61, a storage unit 62 connected to the arithmetic processing unit 61, a wired communication unit 63, a wireless communication unit 64, a position measurement unit 65, a date management unit 66, The input / output signal processing unit 67 and the power supply control unit 68 are included.

  The arithmetic processing unit 61 outputs a command to each of the constituent units 62 to 67 regarding the exchange of data in the behavior management controller 26.

  The storage unit 62 stores work machine dynamics data (operation information, machine information, maintenance information, and warning information) written by the arithmetic processing unit 61 and setting data describing conditions that serve as command criteria for the arithmetic processing unit. . In the storage unit 62, the storage area is divided into a dynamic data storage unit 71, a spontaneous transmission data storage unit 72, and a setting data storage unit 73 according to the data to be stored.

  The wired communication unit 63 performs data communication with another controller (machine control controller 30) in the work machine via the in-vehicle electronic device network 40.

  The wireless communication unit 64 includes a wireless communication device and a memory that can use the wireless carrier network 14, and performs data communication with the management unit communication unit 21 via the wireless carrier network 14. In the memory, a telephone number (contact address data) of the management unit communication unit 21 is stored, and an area for storing a call e-mail from the management unit communication unit 21 is set.

  The position measuring unit 65 includes a GPS receiver, receives radio waves from the GPS satellite 12, and measures the current position.

  The date management unit 66 includes a clock means and a rechargeable battery, has a unique rechargeable battery so that the date and time can be managed even when the main power is off, and the date set in advance by the arithmetic processing unit 61, When the time comes, it is output to the arithmetic processing unit 61.

  The input / output signal processing unit 67 is connected to various devices 56 such as an engine controller, a pump controller, and sensors, and imports dynamic data obtained from the sensors into the dynamic management controller 26 as machine information. Output depending on the type of relay, etc., and depending on the model, it is possible to cope with the case where the machine control controller 30 is not installed.

  The power control unit 68 is connected to the arithmetic processing unit 61, the wireless communication unit 64, and the date management unit 66, and controls the on / off of these internal power sources.

  The storage of each data in the storage unit 62 is processed according to a command of the arithmetic processing unit 61, among which an operating time accumulator, a fuel remaining amount sensor, an engine speed provided in various devices 56 of the work machine 11 Predetermined dynamic data (operation information (operation time information, remaining fuel information), machine information, maintenance information, and warning information) obtained from sensors such as sensors, temperature sensors, and pressure sensors is input / output signal processing unit 67. Then, it is stored in the dynamic data storage unit 71 of the storage unit 62 via the arithmetic processing unit 61.

  Among these dynamic data, if there is abnormal data that matches a condition for issuing a warning such as a decrease in battery charging voltage, it is also stored in the spontaneous transmission data storage unit 72 as warning information. When warning information is stored in the spontaneous transmission data storage unit 72, as will be described later, the arithmetic processing unit 61 displays warning information on the management unit 15 side regardless of the presence or absence of a call e-mail from the management unit 15. Output a command to send.

  The control command of the arithmetic processing unit 61 is based on the setting data stored in the setting data storage unit 73 of the storage unit 62, but the setting data to be updated is transmitted from the management unit 15 side, which is the setting data It is stored in the storage unit 73.

  A notebook computer 77 can be connected to the in-vehicle electronic device network 40 via a service tool 76. The notebook computer 77 communicates with the movement management controller 26 and the machine body control controller 30 via the in-vehicle electronic device network 40 to display machine information and the like on the notebook computer 77 in real time.

  Next, communication processing in the behavior management controller 26 will be described.

  As long as the main power switch is turned on, the arithmetic processing unit 61 constantly checks whether the call e-mail from the management unit 15 is received and stored in the memory of the wireless communication unit 64. .

  When the calling e-mail is transmitted from the management unit 15, it is received by the radio communication unit 64 and immediately stored in the memory of the radio communication unit 64. When the checked arithmetic processing unit 61 confirms the storage, the wireless communication unit 64 retrieves the telephone number of the management unit 15 from the memory of the wireless communication unit 64 and makes the call to the management unit 15 side.

  When the wireless communication unit 64 communicates with the management unit 15, if there is setting data from the management unit 15, it is transmitted, and a transmission request for the desired work machine 11 is transmitted along with it. The arithmetic processing unit 61 first confirms whether or not the setting data has been received, and if received, saves it in the setting data storage unit 73 of the storage unit 62 and updates it, and the management unit 15 uses the updated result as data. Return to the side. As described above, the setting data is a control command of the arithmetic processing unit 61, and after the update, control is performed based on the updated setting.

  Next, when confirming the dynamic data request, the arithmetic processing unit 61 takes out the dynamic data of the desired work machine 11 from the dynamic data storage unit 71 and causes the wireless communication unit 64 to transmit it to the management unit 15. The management unit 15 that receives the dynamic data reflects the dynamic data on the website and provides information to the customer or service person.

  Next, the arithmetic processing unit 61 checks whether there is warning information such as battery low voltage in the spontaneous transmission data storage unit 72 of the storage unit 62, and if there is warning information, extracts the data and manages it from the wireless communication unit 64 Send to part 15.

  Upon receiving the warning information such as the battery low voltage warning information, the management unit 15 reflects the data on the website and alerts the mobile phone 17ph, 19ph of the customer or serviceman registered on the management unit 15 side. Send an e-mail indicating that the information has been received.

  The arithmetic processing unit 61 forcibly disconnects the line when a predetermined time has elapsed after each data transmission. If there is no e-mail for calling from the management unit 15, the arithmetic processing unit 61 always checks whether there is warning information in the spontaneous transmission data storage unit 72 of the storage unit 62, and if there is data, The wireless communication unit 64 makes a call to the management unit 15 to transmit warning information.

  Next, an actual data flow including the customer and the service person of the work machine remote operation management system 10 will be described.

  When customers and in-house (including dealers) service personnel want to know the current operating status of their own or in charge of the work machines 11 they are in charge of, the customer's terminal equipment 17 or the in-house terminal equipment 19 can connect to the Internet network 16. Alternatively, after accessing the website operated by the management unit 15 via the intranet network 18 and logging in with an ID and a password, a request is made to obtain dynamic data of a desired work machine 11.

  On the management unit 15 side, the requested access data to the desired work machine 11 is obtained from its own database 23, and on the basis of the data, a call e-mail is sent to the desired work machine 11 via the wireless carrier network 14. Send.

  On the other hand, on the work machine 11 side, the call e-mail is received by the wireless communication unit 64 of the activity management controller 26. When the arithmetic processing unit 61 of the activity management controller 26 confirms the saving of the calling e-mail, it outputs a call command to the radio communication unit 64, and the management unit via the radio carrier network 14 including the mobile phone communication network Call the 15th side.

  Upon receipt of the call, the management unit 15 side outputs a request signal for dynamic data, and in response to this, the work machine 11 side receives the desired dynamics from the storage unit 62 in the dynamic management controller 26. Data is acquired and output from the wireless communication unit 64. Upon receiving this data, the management unit 15 side temporarily stores it in its own database 23 and reflects it on its own website in a predetermined output format. Accordingly, desired dynamic data at that time is displayed on the customer terminal device 17 or the in-house terminal device 19.

  In this data flow, the dynamic management controller 26 of the work machine 11 obtains power directly from the battery of the work machine 11 even when the engine key switch is off, and operates as long as the main power switch is not turned off. Even when the work machine 11 is not operating, it is in a posture to constantly monitor and respond to the e-mail for calling from the management unit 15 side, so unless the main power switch is turned off, the customer or in-house (dealer) Can request and obtain real-time dynamic data on the desired work machine 11 through the website operated by the management unit 15 at any time.

  Also, if warning information such as battery low voltage warning information is stored in the spontaneous transmission data storage unit 72, even if the engine key switch is turned off, as long as the main power switch is on, the work machine Since the data is immediately transmitted from the 11 side to the management unit 15 side and output to the customer terminal device 17 or the in-house terminal device 19 by e-mail, it can be known in real time that the work machine 11 is abnormal.

  In particular, using the GPS position information acquired through the position measuring unit 65 of the movement management controller 26, the assumed region where the operating position of the work machine 11 is set in relation to the date and time managed by the date managing unit 66 is used. When the work machine 11 moves outside, if the position information is stored as warning information, the customer or serviceman can immediately determine whether or not it is stolen in a remote place. In the case of position information that can be assumed to be highly likely to be stolen, an engine start restriction function such as the airframe control controller 30 shutting off the engine start circuit by itself based on a warning signal from the dynamic management controller 26. By providing, it is possible to prevent theft.

  In addition, all the requests for dynamic data from the customer terminal device 17 or the in-house terminal device 19 are routed through the management unit 15, so that the work machine 11 sends the dynamic data only to the management unit 15. Since the start of the data transmission is limited to the presence or absence of an e-mail for calling from the management unit 15, the work machine 11 has no need for the customer authentication mechanism for passing the data, and has been accessed. Instead of handing over data sometimes, the call is terminated by the call, and then the work machine 11 side and the management unit send data to the management unit 15 to which the connection destination is set from the work machine 11 side. Both 15 have a simple system configuration and there is no risk of data leakage.

  That is, in this work machine remote operation management system 10, the destination of the dynamic data from the work machine 11 side is only the management unit 15 to which contact information is set in advance, and the customer terminal device through the website from the management unit 15 Since the data is provided to the terminal device 19 or the in-house terminal device 19, if the dynamic data is provided only to the management unit 15 on the work machine 11 side, the data can be provided to a plurality of customers or service personnel.

  This is because the work machine 11 can be accessed directly from a plurality of customer terminal devices 17 or in-house terminal devices 19 and the system can be simplified as compared with a system that provides data to the work machine 11 because no individual authentication mechanism is required. At the same time, the communication run cost can be kept low. In addition, data exchange with the work machine 11 is limited to the management unit 15 for which contact information is determined in advance, and since data flows through a limited line, the risk of information leakage is greatly reduced, and security is improved. The construction cost required for this is extremely low.

  In addition, since the management unit 15 performs batch exchange of data with the work machine 11 and reflects the received data on the website and provides it to the customer or service person, for example, only the numerical data from the work machine 11 Even if it is only received, at the stage of reflecting it on the website, raw data of only numerical values can be processed and displayed in the format desired by the customer or service person, and the system is suitable for the convenience of the customer or service person ing.

  In other words, when the management unit 15 performs the data exchange in a batch, the management unit 15 can sort out the dynamic data of the work machine 11 that is necessary for maintenance management and that necessary for the customer. Only necessary data can be provided for each of the customer and the service person. Furthermore, it is possible for the management unit 15 side to collect the dynamic data of all work machines at a fixed time and reflect the data on the website. Can be inexpensive.

  As described above, the work machine remote operation management system 10 is a battery 51 that is charged by receiving power from the generator 50 driven by the engine 37, and an in-vehicle controller that can communicate with the power supplied from the battery 51. A work machine 11 having a dynamic management controller 26, a management unit 15 capable of bidirectional communication with the dynamic management controller 26, and terminal devices 17 and 19 capable of bidirectional communication with the management unit 15, Dynamic data of the work machine 11 is provided to the terminal devices 17 and 19 via the management unit 15.

  Next, a low voltage warning method in the work machine 11 will be described with reference to the flowchart shown in FIG.

(Step 1)
Based on the movement data acquired by the management unit 15 from the movement management controller 26 of the work machine 11 via the wireless carrier network 14, the management unit 15 has a normal battery voltage of the battery 51 mounted on the work machine 11. It is determined whether or not a specified voltage (for example, 12.1 V) that is a charging voltage is not reached.

(Step 2)
Furthermore, when the battery voltage of the work machine 11 is less than a specified voltage (for example, 12.1 V), the management unit 15 determines that the continuous operation time of the engine 37 for a predetermined time (for example, 3 days) based on the dynamic data. It is determined whether it is less than a specified time (for example, 1 hour).

(Step 3)
When the battery voltage of the work machine 11 is less than the specified voltage and the continuous operation time of the engine 37 within the predetermined time is less than the specified time, the management unit that acquires this state from the dynamic management controller 26 of the work machine 11 15 is a low-voltage warning e-mail message “Battery voltage has fallen below the specified voltage.” To prevent the battery from running out and prompt charging to terminal devices 17 and 19 of remote customers and service personnel who maintain and manage work machine 11. The operation of the management controller 26 is stopped ".

(Step 4)
The management unit 15 transmits the low voltage warning mail and transmits a stop signal to the dynamic management controller 26 mounted on the work machine 11 to stop the operation of the dynamic management controller 26.

  By adopting such a low-voltage warning method, when the battery voltage of the work machine 11 is less than the specified voltage, the management unit 15 that acquires this state from the work machine dynamic management controller 26 causes the work machine 11 to By sending a low-voltage warning mail to the remote customer or serviceman terminal devices 17 and 19 to be maintained and managed, battery replacement and charging can be promoted.

  At that time, if the battery capacity is small, the battery voltage fluctuates greatly, and the battery voltage may drop below the specified voltage even during normal operation. A condition that the low voltage warning mail is sent only when the battery voltage is less than the specified voltage and the continuous operation time of the engine 37 within the specified time is less than the specified time, and charging time for continuous operation is taken into account. Thus, erroneous detection of low voltage can be prevented, and an abnormal decrease in battery voltage can be appropriately judged and warned.

  The present invention is effective for a vehicle equipped with a small battery such as a mini excavator or a mini loader.

10 Work machine remote operation management system
11 work machines
15 Administration Department
17, 19 Terminal equipment
26 Dynamic management controller as in-vehicle controller
37 engine
50 generator
51 battery

Claims (1)

A work machine including a battery that is charged by receiving electric power from a generator driven by an engine, an in-vehicle controller that can communicate with the electric power supplied from the battery, and a management unit that is capable of bidirectional communication with the in-vehicle controller; In the work machine remote operation management system comprising a terminal device capable of two-way communication with the management unit, and providing dynamic data of the work machine to the terminal device via the management unit,
When the battery voltage of the work machine is less than the specified voltage and the continuous operation time of the engine within the specified time is less than the specified time, the management unit that acquires this state from the on-board controller of the work machine maintains the work machine. A low voltage warning method in a work machine, characterized by sending a low voltage warning mail to a terminal device of a manager.

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