JPH0932039A - Work machine temporary abnormality detection device, and work machine abnormality notification system - Google Patents

Abstract

(57) [Summary] [Purpose] For construction and civil engineering work machines, accurately detect the occurrence of temporary abnormalities and appropriately perform them when repairs are required. [Composition] Electronic control of work machine operation based on detection signals of various sensors, equipped with an electronic control controller 13 for self-diagnosis to check abnormality and normality of various sensors and controller itself. A storage unit that stores the failure code, a failure code reading unit that repeatedly reads the failure code from the storage unit, and an erase command that erases the failure code in the storage unit after each reading of the failure code And an analysis unit that analyzes a failure based on the occurrence state of the failure code. A communication controller 11 and a management center 12 are provided for the electronic controller, and management is performed at a remote management center using wireless communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a temporary abnormality of a working machine and a system for notifying an abnormality of the working machine, and particularly to a construction / working machine such as a hydraulic excavator, a crane, a bulldozer, etc. The present invention relates to a temporary abnormality detection device suitable for maintenance and management of civil engineering work machines, and an abnormality notification system.

[0002]

2. Description of the Related Art The operation of a mobile work vehicle (hereinafter referred to as a work machine) for construction and civil works such as hydraulic excavators in recent years is controlled by an electronic configuration of a controller including an MPU and the like. Therefore, many kinds of sensors are attached to the body of the work machine in order to obtain data on many states of the work machine required for electronic control. If abnormal operation occurs in the controller included in the electronic configuration or many of the above sensors, electronic control cannot be performed well, so the fact that an abnormality has occurred can be found quickly and the cause of the abnormality can be quickly and accurately determined. It is necessary to. Therefore, the electronic controller has a function of performing a failure diagnosis. The result obtained by such a failure diagnosis is stored in a memory provided in the controller using a failure code indicating the details of the failure. When an abnormality occurs, the maintenance personnel immediately or periodically go to the work site to read the failure code stored in the memory of the controller and check the content of the failure.

When an abnormality of the sensor is detected by the above-mentioned failure diagnosis function provided in the electronic control controller, usually, as shown in FIG.
D-convert and read to MPU in the controller, A / D
It is detected by determining whether the converted value is within a certain range.

As an example of a document of the prior art, for example, Japanese Patent Laid-Open No.
There is a publication of 26784. In this document, a method for centrally managing the maintenance of a plurality of construction work machines at each work site at one location is shown so that a failure of each work machine can be predicted or found in a mild state. That is, each work machine is attached with various sensors capable of detecting various states, and the state data detected by each sensor is sent to the host computer via the terminal. The host computer has a database and a judgment function for judging a failure, judges the failure based on the sent state data, and if the failure is recognized, informs the fact to the terminal and repairs it. Configured to signal a need or need for maintenance.

[0005]

According to the above-mentioned conventional method of determining an abnormality in the failure diagnosis, the details of the abnormality can be known from the failure code. However, it is not possible to distinguish between temporary abnormalities caused by noise that occurs instantaneously during machine operation and poor contact of terminals, and permanent abnormalities such as sensor damage and cable disconnection. Have.

Further, when a temporary abnormality occurs due to noise or the like, the electronic control controller operates as if the abnormality did not occur due to its self-recovery function, so that there is no need for immediate repair. However, it is important to accurately grasp the frequency of occurrence of such temporary abnormality in evaluating the stability of the controller. Furthermore, if the frequency of temporary abnormalities is high, even if it is recovered, it may be necessary to repair the faulty part that causes the abnormalities. It is desirable to accurately grasp the frequency of occurrence of.

Further, in order to incorporate in advance a function in the controller that can determine whether or not the repair of the faulty part is necessary based only on the determination of the abnormality that occurs temporarily, it takes a long development period. Many costs are required.

According to the configuration of maintenance and management shown in the above-mentioned prior art document, the judgment is made by comparing the state data with the reference value, and a special consideration is given to the specific problem concerning the temporary abnormality. Or no solution is shown.

The object of the present invention is to solve the above-mentioned problems and to meet the above-mentioned needs. Therefore, it is possible to accurately detect the occurrence state of an abnormality which occurs temporarily particularly in a working machine for construction and civil engineering. The purpose of the present invention is to provide a device for detecting a temporary abnormality of a working machine, which can appropriately perform such repair or maintenance.

Another object of the present invention is to communicate wirelessly from a remote management center in a work machine for construction / civil engineering so as to accurately detect the occurrence state of an abnormality temporarily occurring in this management center. An object of the present invention is to provide an abnormality notification system for a work machine that can be detected and, as a result, allows a person in charge to go to the site to perform repair or the like when repair or maintenance is needed.

[0011]

A device for detecting a temporary abnormality of a working machine according to a first aspect of the present invention (corresponding to claim 1) is a device for detecting various sensors provided on each part of a body of a working machine. It is used for a work machine equipped with an electronic control controller for electronically controlling the operation of the work machine based on signals and for self-diagnosis of inspecting various sensors and the controller itself for abnormalities and normality. , A storage unit that stores a failure code obtained by the self-diagnosis function, a failure code reading unit that repeatedly reads the failure code stored in the storage unit, and a failure code reading unit that reads the failure code is 1 After each time, the failure code generated by the failure command reading unit and the erasure command unit that deletes the failure code stored in the storage unit are generated each time. Composed of an analysis unit for analyzing the failure based on. The configurations of the storage unit, the failure code reading unit, the erasing command unit, the analyzing unit, and the like are desirably provided in a controller different from the electronic control controller,
The controller is also installed on the work machine. It is also possible to add the above configuration to the electronic controller itself.

In the first aspect of the present invention, the failure code indicating the failure content, which is obtained by the self-diagnosis function of the electronic controller and is stored in the storage section, is periodically or as required predetermined by the failure code reading section. The fault code read out by the erasing instruction section is erased from the storage section each time it is repeatedly read out at time intervals. By repeating this operation, in the failure code reading unit, information about failures that occur temporarily or instantaneously among the failure codes obtained by the self-diagnosis function of the electronic controller, such as the time of occurrence, the time interval of occurrence, The status such as the frequency of occurrence can be obtained. By using such information, the analysis unit can analyze the details of the failure and the necessity of repair or the like.

According to a second aspect of the present invention (corresponding to claim 2) of the temporary abnormality detecting device for a working machine, in the first aspect of the invention, the analyzing unit analyzes the failure according to the frequency of occurrence of the failure code. Is composed of. The frequency of occurrence is the most useful information for detecting a failure temporarily or instantaneously.

A work machine abnormality notification system according to a third aspect of the present invention (corresponding to claim 3) is configured as follows.
First, the electronic control has a function of electronically controlling the operation of the work machine based on detection signals of various sensors provided in each part of the work machine, and a self-diagnosis function of inspecting various sensors and the controller itself for abnormality / normality. It has a controller. This electronic controller is mounted on the main body of the work machine and has a first storage means for storing a failure code indicating the details of the failure obtained by the self-diagnosis function. Further, the work machine is equipped with a communication controller, which communicates the electronic controller with a failure code reading unit for instructing the electronic controller to read the failure code stored in the first storage means. A second storage unit for storing and a wireless communication control unit are provided. Further, it has a management center including a communication control unit and a management unit. This management center is configured to be able to mutually communicate with the communication controller by its own communication controller and the wireless communication controller of the communication controller.
In the above configuration, the communication controller reads the failure code stored in the first storage section of the electronic controller by the failure code reading section periodically or as needed, and stores the latest failure code in the second storage section. The management center communicates with the communication controller via the communication control unit and the wireless communication control unit, receives the failure code stored in the second storage unit, stores the failure code in the management unit, and communicates with the communication unit. The communication controller, which has sent the failure code deletion command to the controller and has further received the failure code deletion command, deletes the failure code stored in the second storage unit and also sends the failure code deletion command to the electronic control controller, and finally Then, the electronic controller that has received the failure code deletion command deletes the failure code stored in the first storage unit.

In the third aspect of the present invention, the electronic controller of the working machine such as the hydraulic excavator originally performs the failure diagnosis of the sensor and the controller itself, and when an abnormality is detected, the failure code is stored in the memory. Record in section. Further, the communication controller added to the electronic controller performs the above-mentioned failure code reading operation, stores the latest failure code in the second storage unit, and further uses a wireless communication device at an appropriate timing to manage the management center. It is sent to the management unit, that is, the computer. The timing for performing such transmission may be set from the communication controller side or the management center side. When the management center receives and stores the failure code, the management center sends an instruction to delete the failure code to the communication controller. After that, the fault code which is the result of the self-diagnosis of the electronic controller is read again in the same manner as above. By repeating such operations, it is possible to determine, on the side of the management center located away from the work machine, whether the abnormality that has occurred in the electronic control controller is a temporary abnormality or a constant abnormality. Therefore, it is possible to know the frequency of the failure code that occurs temporarily. By this determination, it is possible to easily and accurately repair and store the work machine regarding a temporary abnormality.

A work machine abnormality notification system according to a fourth aspect of the present invention (corresponding to claim 4) is the work machine abnormality notification system according to the third aspect of the present invention, wherein the management section of the management center causes a failure based on the frequency of occurrence of the received failure code. Is configured to include an analysis unit that analyzes The frequency of occurrence of failure code is the most desirable information for temporary abnormality.

A work machine abnormality notification system according to a fifth aspect of the present invention (corresponding to claim 5) is the work machine abnormality notification system according to the third aspect of the present invention, wherein the communication controller detects an engine start of the work machine engine. , Equipped with a recording unit that records that the fault code has been erased, the engine start detection unit detects engine start after the fault code has been erased, performs fault diagnosis of the electronic control controller, and manages the result. It is configured to send to the center.

In the fifth aspect of the present invention, the communication controller transmits a failure code erasing command to the electronic controller and records the fact that the failure code has been erased in the recording unit, and then the engine start detector detects the engine of the working machine. To see if it has restarted. When the communication controller detects that the engine is restarted, the failure diagnosis result of the electronic control controller is read, and then the failure diagnosis result is transmitted to the management center.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a typical embodiment of a work machine abnormality notification system according to the present invention. This work machine abnormality notification system includes the configuration of the work machine temporary abnormality detection device according to the present invention. Illustration of the body of the work machine itself is omitted in FIG. The abnormality notification system according to the present embodiment includes a communication controller 11 mounted on a work machine, and a management center 1 for performing maintenance on the work machine at a location distant from the work machine.
And 2.

Reference numeral 13 denotes an electronic controller mounted on the work machine for electronically controlling the operation of each drive unit of the work machine. The electronic controller 13 has a built-in MPU and memory (first storage unit) not shown and has an electronic configuration. Further, various parts of a vehicle body of a work machine (not shown) which is an object of control are provided with various sensors for detecting the operating state thereof. Taking a hydraulic excavator as an example of the work machine, the electronic controller 13 controls the operation of the engine and the hydraulic pump. On the other hand, in order to enable the electronic controller 13 to perform such control, various sensors such as an engine speed sensor and a pressure sensor are attached to each part of the working machine, and detection signals of these sensors are input to the electronic controller 13. It

The electronic controller 13 is provided with a self-diagnosis function for inspecting whether the above-mentioned sensors are operating normally. Furthermore, electronic controller 1
3 is also provided with a self-diagnosis function for checking whether the internal memory operates normally or whether the data value has been rewritten to an abnormal value. This self-diagnosis function is executed when the engine is started. When an abnormality is detected by such a self-diagnosis function of the electronic controller 13, the content of the abnormality is stored in the memory in the electronic controller 13. The content of the abnormality stored in the memory is stored as a failure code corresponding to the content of the abnormality, and is output from the output port of the electronic controller 13 according to a read command from the outside. Further, the failure code stored in the memory in the electronic controller 13 can be erased by an erase command from the outside.

The communication controller 11 has a function of reading a failure code stored in a memory in the electronic controller 13, a function of erasing the failure code in the memory, and a function of detecting engine start. In addition, the communication controller 11 and the management center 12
It has a function to exchange commands and data wirelessly.

The communication controller 11 includes an engine start detection unit 14, a failure code input unit 15, a failure code deletion command output unit 16, an MPU 17 for controlling the operation of the communication controller 11, and a control executed by the communication controller 11. Instructions and data are exchanged wirelessly between the ROM 18 in which the processing procedure is stored, the RAM (second storage unit) 19 that temporarily stores the control contents during control and the calculation result, and the management center 12. The wireless communication control unit 20 and its antenna 21 are included. Inside the MPU 17, at least a failure code reading unit is provided as a functional unit. The fault code reading unit is the fault code input unit 15
It has a function of giving a read command to the electronic controller 13 via the, and reading the fault code stored in the memory.

The management center 12 carries out maintenance (maintenance / management) of the working machine. Management center 12
Is provided with a communication control unit 24 connected to a wireless relay station 22 and a telephone line 23 provided outside, and a management unit 25 that maintains and manages each working machine by using a computer. There is.

The radio relay station 22 has an antenna 26.
Commands and data are exchanged between the wireless relay station 22 and the communication controller 11 by radio waves 27 via the antennas 21 and 26.

Next, referring to the flowcharts of FIGS. 2 to 6, the functions of the electronic controller 13, the communication controller 11, and the respective parts of the management center 12, the electronic controller 13, the communication controller 11, and the management center 1
Various operations executed between the two will be described. 2 is a flowchart illustrating the operation of the electronic controller 13, FIG. 3 is a flowchart illustrating the operation of the communication controller, FIG. 4 is a flowchart illustrating the first processing procedure (processing procedure A) of the communication controller, and FIG. FIG. 6 is a flowchart illustrating the second processing procedure (processing procedure B) of the communication controller, and FIG. 6 is a flowchart illustrating the operation in the management center.

The operation of the electronic controller 13 will be described with reference to FIG. The electronic controller 13 performs a self-diagnosis operation of various sensors and the like that supplies signals relating to the state of each part of the work machine to the electronic controller 13 during the original operation (step S11) of controlling the operation of the work machine ( Perform step S12). As a result of this self-diagnosis operation, when it is determined that an abnormal state has occurred (step S13), the details of the abnormality are stored in the memory (first storage unit) using the failure code (step S).
14).

When the engine of the work machine is started, whether or not the memory in the electronic controller 13 operates normally, or whether the data in the memory has been rewritten into an abnormal state A self-diagnosis operation for checking whether or not it is performed. This self-diagnosis operation is performed before the flowchart of FIG. 2 is executed, and is therefore not shown in FIG. When it is determined by the self-diagnosis operation at the time of engine startup that an abnormal state has occurred, the details of the abnormality are stored in the memory using the failure code.

Further, the communication controller 11 gives a command to the electronic controller 13 to periodically read the fault code stored in the memory. Therefore, the electronic controller 13 determines whether or not there is a failure code read command from the communication controller 11 (step S15), and if there is the command, the abnormality stored in the memory in the electronic controller 13 is detected. The failure code indicating the content is transmitted to the communication controller 11 (step S16).

The communication controller 11 further gives a command to the electronic controller 13 for erasing the fault code stored in the memory, if necessary. Therefore, the electronic control controller 13 determines whether or not there is a failure code deletion command from the communication controller 11 (step S17), and if there is the command, the abnormality content stored in the memory in the electronic control controller 13 is determined. The fault code indicating the is deleted (step S
18).

Next, the operation of the communication controller 11 will be described with reference to FIG. As described above, the communication controller 11
The fault code reading unit gives a fault code reading command to the electronic controller 13 periodically or as needed (step S21). As a result, the communication controller 11 reads the failure code from the electronic controller 13 via the failure code input unit 15 (step S22), and the failure code is stored in the memory (RAM) 19 in the communication controller 11 as the previously recorded failure code. It is compared whether they match (step S23). If it is determined in step S23 that they match, the read failure code is not stored and the process returns to the start. If it is determined in step S23 that they do not match,
The read failure code and the occurrence time of the failure are recorded in the RAM 19 in the communication controller 11 (step S24). By this operation, the communication controller 1
In No. 1, when an abnormality first occurs, the failure code related to the content of the abnormality and the time when the abnormality first occurs are recorded.

In the communication controller 11, the wireless communication control unit 20 communicates with the management center 12 via the radio wave 27. Then, it is determined whether or not there is communication from the management center 12 side (step S25), and if it is determined that there is communication, the processing procedure A is executed. Further, it is determined whether or not the engine is restarted (step S26), and when it is determined that the engine is started, the processing procedure B is executed. Details of the processing procedure A and the processing procedure B will be described later.

First, the processing procedure A executed by the communication controller 11 will be described with reference to FIG. This processing procedure A is carried out when there is a request communication from the management center 12.

In the processing procedure A, when the failure code is stored in the RAM 19 and the management center 12 makes a request (step S25), the failure code is sent to the wireless communication control section 20 and the antenna 21. It is transmitted to the management center 12 via the communication (step S31).
When a failure code deletion command is sent from the management center 12 through communication (step S32), the failure code stored in the RAM 19 of the communication controller 11 is deleted, and the failure code deletion command output unit 16 is activated. A fault code erasing command is transmitted to the electronic controller 13 via (step S33). As described above, the electronic controller 13 which receives the failure code deletion command from the communication controller 11 deletes the failure code (FIG. 2,
Steps S17, S18). Next, the communication controller 1
In order to show that the failure code deletion command was executed in 1,
The failure code erase flag is written in the AM 19 (step S34).

After a relatively short time, the failure code is read from the electronic controller 13 via the failure code input section 15 (step S35). When the failure code is received (step S36), the failure code and the time of occurrence are transmitted to the management center 12 (step S37). When the failure code is not received in step S36, the fact that there is no abnormality is transmitted to the management center 12 (step S38). Next, the state of communication disconnection from the management center 12 side is awaited (step S39), and when communication is disconnected, the process proceeds to the next step S26 shown in FIG.

As described above, the electronic controller 13
After erasing the fault code stored in the internal memory, immediately check the occurrence of the fault code, and if the fault code is generated, the abnormality indicated by the fault code is always occurring. Turns out to be Further, the communication controller 11 can know the time when the failure code is first received after the failure code is erased. In this way, by obtaining the time from the erasure of a failure code to the reception of the next failure code, the time required for occurrence of an abnormality (time interval of occurrence) can be known. By collecting such data, the frequency of occurrence of abnormalities that occur temporarily can be obtained.

The operation of the processing procedure B of the communication controller 11 will be described with reference to FIG. In the processing procedure B, when the engine of the work machine is started, the failure code erase flag generated in the processing procedure A shown in FIG.
If it exists in. If the fault code deletion flag is written in the memory (RAM 19) (step S
41) and start communication with the management center 12 (step S42). Next, the failure code is read from the electronic controller 13 (step S43), and if the failure code can be received (step S44), the failure code and its occurrence time are transmitted to the management center 12 (step S45).
If it is determined in step S44 that there is no failure code, information indicating no abnormality is transmitted to the management center 12 (step S46). After that, the failure code erasure flag is cleared (step S47), and the communication is disconnected (step S47).
48), and returns to the previous processing shown in FIG.

As described above, by reading the failure code when the engine is started, it is possible to know the abnormality of the memory or the data which is detected inside the electronic controller 13 when the engine is started.

The processing operation in the management center 12 will be described with reference to FIG. In order to check whether or not an abnormality has occurred in the work machine in the management center 12, it is necessary to perform communication between the management center 12 and the communication controller 11. This communication is performed by calling from the communication controller 11 or calling from the management center 12 (step S51). When the communication is started (step S52), the communication controller 11
Receives the failure code from (steps S53, S54),
The received failure code is stored in the storage device in the computer provided in the management unit 25 (step S55). If no fault code is received, return to start.

After the failure code is recorded in step S55, if the manager of the management center 12 determines that it is necessary, a failure code erasing command is transmitted to the communication controller 11 (step S56). Then, the communication controller 11
Waits for a response from (step S57). The communication controller 11 executes the processing procedure A as described in FIG.
Since the failure code of the electronic controller 13 is searched again and transmitted to the management center 12 side, the management center 12 waits for the transmission. When such a transmission is made, it is stored in the storage device of the management unit 25.

Next, the management center 12 analyzes the details of the failure based on the given failure code (step S5).
8) If it is determined that the work machine needs to be inspected / repaired (step S59), the inspection / repair is carried out (step S60). Decision step 59
Therefore, if it is determined that inspection / repair is not necessary, the procedure will return to the start. In this way, the management center 12
The manager analyzes the failure code, determines whether or not inspection / repair is necessary, and if necessary, performs inspection / repair.

According to the above embodiment, the electronic controller 13 for electronically controlling the operation of the working machine equipped on the working machine such as the hydraulic excavator is stored in the memory of the electronic controller 13. Another controller for periodically reading the fault code stored by the diagnostic function, that is, the communication controller 11 is provided. The latest failure code read by the communication controller 11 is stored in the memory (RAM 19). Further, the communication controller 11 is connected to the management center 12
The failure code is transmitted to the management center 12 in response to the call from. Further, the communication controller 11 is connected to the management center 12
The failure code stored in its own memory is erased in response to the instruction from the computer, and an erase command is issued to the electronic control controller to erase the failure code stored in the memory. In this way, the failure code obtained by the self-diagnosis function of the electronic controller is repeatedly read out via the communication controller 11, and finally managed by the management center 13 located remotely from the work machine by wireless. Thus, it is possible to know the details of the failure that occurs temporarily (occurrence time, occurrence time interval, occurrence frequency, etc.). The abnormality notification system for a work machine according to the above-described embodiment is based on a device that detects a temporary abnormality.

In another embodiment, a management center is not provided, and the MPU 17 of the communication controller 11 has, as a function means, a failure code reading section as well as an erasing command means for erasing the failure code and a failure code reading means. It is also possible to provide an analyzing means for analyzing the failure based on the obtained occurrence status of the failure code. The administrator can periodically obtain data on a failure that occurs temporarily from the communication controller equipped on the work machine.
In this way, an apparatus for detecting a temporary abnormality can be realized by the electronic controller and the communication controller equipped on the work machine.

As another embodiment, the function of the communication controller may be incorporated into an electronic controller.

[0046]

As apparent from the above description, the present invention has the following effects.

The failure diagnosis result by the self-diagnosis function of the electronic controller is read out, the failure diagnosis result stored in the memory is erased, and this operation is repeated at least once. It is possible to determine whether the generated abnormality is a temporary abnormality or a steady abnormality. By reading the failure diagnosis result of the electronic controller, that is, reading the failure code repeatedly at short intervals and rechecking the failure code, it is possible to know the frequency of abnormalities that occur temporarily.

Further, since the above-mentioned failure diagnosis result is read out by the communication controller and the management center, which is a base station in a remote place, stores and analyzes the failure code by utilizing the structure of wireless communication, Since the machine can be checked without going to the site where it is working, it is possible to reliably carry out the abnormality determination at the management center.

Since the management center can determine the details of the abnormality, it is possible to take an early response when the abnormality occurs.

Further, since the failure diagnosis is carried out at the time of starting the engine and the result is automatically transmitted, the result of the failure diagnosis occurring at the time of starting the engine can be promptly and surely obtained from the management center.

Further, since the computer of the management center can determine the abnormality, it is not necessary to provide the electronic control controller or the communication controller with a high function, and the inexpensive electronic control controller or the communication controller can be manufactured.

[Brief description of drawings]

FIG. 1 is a block diagram showing a preferred embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the electronic controller.

FIG. 3 is a flowchart showing the operation of the communication controller.

FIG. 4 is a flowchart showing the contents of processing procedure A.

5 is a flowchart showing the contents of processing procedure B. FIG.

FIG. 6 is a flowchart showing the operation of the management center.

FIG. 7 is a characteristic diagram for explaining a sensor failure.

[Explanation of symbols]

 11 Communication Controller 12 Management Center 13 Electronic Control Controller 14 Engine Start Detection Section 15 Failure Code Input Section 16 Failure Code Erase Command Output Section 17 MPU 19 RAM 20 Wireless Communication Control Section 24 Communication Control Section 25 Management Section

Claims (5)

[Claims] 1. A function of electronically controlling the operation of the work machine based on detection signals of various sensors provided in each part of the work machine, and a self-diagnosis for inspecting abnormality and normality of the various sensors and the controller itself. In a work machine including an electronic controller having a function, a storage unit that stores a failure code obtained by the self-diagnosis function, and a failure code reading unit that repeatedly reads the failure code stored in the storage unit. The erase code reading unit obtains the fault code stored in the storage unit after the fault code reading unit has read the fault code once, and the fault code reading unit obtains the fault code. A working machine comprising: an analyzing unit that analyzes a failure based on a state of occurrence of the failure code. Temporary abnormality of the detection device. 2. The apparatus for detecting a temporary abnormality of a work machine according to claim 1, wherein the analysis means analyzes a failure according to a frequency of occurrence of the failure code. 3. A function of electronically controlling the operation of the work machine based on detection signals of various sensors provided in each part of the work machine, and a self-diagnosis for inspecting abnormality or normality of the various sensors or the controller itself. An electronic control controller having a function, wherein the electronic control controller is equipped in the work machine, and is equipped with first storage means for storing a failure code obtained by the self-diagnosis function, and is equipped in the work machine. A communication controller,
The communication controller includes a fault code reading unit that instructs the electronic controller to read the fault code stored in the first storage unit, a second storage unit that stores the read fault code, and a wireless communication unit. A management center comprising communication control means and communication control means and management means,
The management center is configured to be able to mutually communicate with the communication controller by the communication control means and the wireless communication control means. In the above configuration, the communication controller is regularly or as needed. The failure code reading means reads out the failure code stored in the first storage means of the electronic controller, and stores the latest failure code in the second storage means. Means for communicating with the communication controller via the wireless communication control means, receives the failure code stored in the second storage means, stores the failure code in the management means, and communicates with the communication controller. The communication controller which has sent the failure code deletion command and has received the failure code deletion command is the second storage means. While erasing the stored failure code, the failure code erasing command is sent to the electronic control controller, and the electronic control controller receiving the failure code erasing command deletes the failure code stored in the first storage means. A work machine abnormality notification system characterized by erasing. 4. The abnormality notification system for a work machine according to claim 3, wherein the management means of the management center includes an analysis means for analyzing a failure based on an occurrence frequency of the received failure code. 5. The communication controller comprises engine start detection means for detecting start of an engine of the work machine,
A means for recording the fact that the fault code has been erased is recorded, and after the fault code has been erased, the engine start detecting means detects the start of the engine, and the fault diagnosis of the electronic control controller is performed, and the result is described above. The abnormality notification system for a working machine according to claim 3, wherein the abnormality notification system transmits the information to a management center.