JPH0750019B2 - Electro-mechanical system diagnostic device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic device for an electro-mechanical system device such as a power supply control device, a speed control device and a cargo handling control device in a construction machine for industrial machines such as batteries and forklifts. Is.

2. Description of the Related Art As a conventional diagnostic device for an electro-mechanical system device or an electrical device, for example, a diagnostic device disclosed in JP-A-63-49266 is disclosed. This diagnostic device requires a computer for operating a peripheral device by a predetermined processing means, an input device for inputting information to the computer as necessary, and contents of intermediate data and result data processed by the computer. A display device for displaying the information, a recording device for printing out the processing contents of the computer and the contents of the display device as necessary, a diagnostic work processing means storing means for storing a processing procedure of the diagnostic work, and the diagnostic work. Data storage means for diagnosing business, which stores necessary data, customer and warehousing history data storage means, which stores data regarding customers and data regarding warehousing history of the vehicle to be diagnosed, and various types mounted on the diagnostic site of the vehicle to be diagnosed. A measuring device including a sensor, and a service person to the computer or a service from the computer as needed during the diagnostic work. A remote control box for giving instructions to a user, and a terminal connected between the measuring device and the remote control box and the computer to process signals between the three parties as necessary. With the above configuration, when the service person attaches the sensor of the measuring device to the device to be diagnosed and inputs the necessary information from the input device, the CP
The U (computer) draws out the necessary inspection methods and items from the diagnostic work processing means storage means according to the instructions, displays them on the display device, and the service person performs the predetermined measurement according to the displayed contents, and the measured value from the measurement device. The CPU compares the measurement item previously stored in the data storage means with the reference value by the CPU, determines whether the measurement value is normal or abnormal, and displays the determination result on the display device. In this way, the prescribed diagnostic items are diagnosed one after another, and the abnormal parts are adjusted and corrected, parts are replaced, etc.
Finally, it is confirmed that the area is normal, and the results are printed out by a recording device as needed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional diagnostic device, the service person performs a failure diagnosis to estimate the cause of the failure from the place where the measured value becomes abnormal, and the service person often bears the experience. Therefore, there is a problem that a newcomer cannot perform a failure diagnosis, and even if a failure diagnosis is performed, the work efficiency is extremely poor.

In order to solve such a problem, an expert system has been developed for performing a failure diagnosis from a place where a measured value becomes abnormal (for example, Japanese Patent Laid-Open No. 63-261453).
However, even if a failure diagnosis is made in such an expert system, there is a problem that a new employee cannot actually perform the work because he / she does not have knowledge of how to eliminate (repair) the cause of the failure. there were.

Also, when attaching the sensor of the measuring device to the device to be diagnosed,
Since they are connected by using a special connector or a clip, the electro-mechanical device to be inspected may need to be modified, which takes time to set up and there is a problem that work efficiency is poor.

The present invention solves the above problems and enables even a new person to perform a failure diagnosis of a device to be diagnosed (electrical-mechanical system device) and repair a failure point, improve work efficiency, and further inadvertently make mistakes by an expert. It is an object of the present invention to provide a diagnostic device for an electro-mechanical system device that can prevent mistakes caused by mistakes.

Means for Solving the Problems In order to solve the above problems, a diagnostic device for an electro-mechanical system device according to the present invention includes a measuring device for performing a required measurement at a measuring point of an electro-mechanical system device to be inspected, an input means, and a display. It has a means, measures points for each inspection item, presumed causes and countermeasures corresponding to operation items, failures, a list of replacement parts, and a circuit diagram of abnormal points are stored in advance, and measurement points are determined by the inspection items input from the input means. Is set to the measuring device, and the operation items of the electro-mechanical system device to be inspected are output to the display means, and the analysis according to the failure analysis tree is performed normally by the result of the measurement data of the measuring point input from the measuring device. It is provided with a failure diagnosing device for determining whether the failure occurs or not, and in the case of failure, the probable cause, the countermeasure method, the replacement part list, the circuit diagram of the abnormal portion, and the reference explanatory diagram are output to the display means.

Further, a second invention is such that the failure diagnosing device of the first invention outputs the operation items to the display means in sequence while confirming the input of the response, based on the inspection items input from the input means. .

A third invention is such that the failure diagnosis device of the first invention stores the analysis result data for each diagnosis and manages the history.

A fourth aspect of the present invention is the addition of a printer to the configuration of the first aspect of the present invention, and a failure diagnosis device is provided to the printer. The analysis result at the time of diagnosis and the probable cause, countermeasure method, replacement part list, and abnormality in the case of failure Output the circuit diagram and reference explanation diagram of the part,
It is designed to produce a report.

Furthermore, a fifth aspect of the invention is such that the failure diagnosing device of the first aspect of the invention is further provided with communication means, and information of an electromechanical system device to be inspected is input from a higher-level device through the communication means, and the diagnosis is performed according to this information. The level is changed, and the analysis result at the time of diagnosis is output to the higher-level device via the communication means.

A sixth aspect of the present invention is that the fault diagnosing device according to the first aspect of the present invention is provided with a communication means, and the measurement data of the measuring point of the inspected electro-mechanical system device input from the measuring device to the higher-level device via the communication means. And outputs a high-level diagnostic result of the electro-mechanical system device to be inspected, which is performed based on the measurement data in the upper device, from the upper device via the communication means. It is a thing.

Further, a seventh aspect of the invention is such that the measuring device and the inspected electro-mechanical system device are connected by connecting a cable of a takeover method to an existing connector of the inspected electro-mechanical system device.

Operation With the above configuration, when the inspection item is input to the failure diagnosis device, the measurement point and the measurement device corresponding to the inspection item are set, and the operation item of the electromechanical system device to be inspected is output to the display means. Inspection When the electro-mechanical system device is operated according to the operation item and the measurement data of the measurement point is input from the measurement device, automatic analysis according to the failure analysis tree is performed from the measurement data to determine whether it is normal or defective. Outputs the corresponding probable cause, countermeasure method, list of replacement parts, circuit diagram of abnormal place and other reference explanatory diagrams to the display means.

According to the second invention, the failure diagnosis device sequentially displays the operation items on the display means in an interactive manner. Therefore, even a newcomer can make a diagnosis without error.

Further, according to the third aspect of the invention, the failure diagnosis apparatus accumulates the analysis result data at each diagnosis, and manages the history for each inspected electro-mechanical system apparatus.

Further, according to the fourth invention, the failure diagnosis device outputs the analysis result and the presumed cause of the failure to the printer, and prints out as a report. Therefore, the service person is reduced in clerical work.

Further, according to the fifth aspect of the present invention, the failure diagnosis device is connected to a higher-order device by a communication means, so that information of the inspected electro-mechanical system device, for example, reference data, history data, and circuit diagram is input, and the information is input to these information. Accordingly, the diagnostic level is changed so that, for example, a location where a failure has occurred is intensively diagnosed, the analysis result is output, and information, such as history data, is updated and managed in the upper device.

Further, according to the sixth invention, the failure diagnosing device outputs the measurement data of the measuring point of the electromechanical system device to be inspected inputted from the measuring device to the upper device, and the upper device is inspected in accordance with these measurement data. A high level diagnosis of the electro-mechanical system device is performed and the result of this diagnosis is output to the failure diagnosis device.

According to the seventh aspect of the invention, the measuring device and the inspected electro-mechanical system device are connected only by connecting the cable of the interception type to the existing connector.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a diagnostic device for an electro-mechanical system according to the present invention.

The electro-mechanical system diagnostic device of the present invention has a keyboard 1 which is an input device and a CRT 2 which is a display device, and is a portable fault diagnostic device 3 composed of a computer, and an electric device of a battery / forklift 4. It is composed of a portable measuring device 6 which is connected to the measuring device 5 and performs a required measurement at a measuring point of the electric device 5, and a printer 21 which prints out the contents according to the output of the failure diagnosing device 3. The failure diagnosis device 3, the measurement device 6, and the printer 21 are of a three-power supply type. Since the degree of wear and damage of the mechanical system also appears as an electric signal in the electric device 5, an abnormality of the mechanical system can be measured.

As shown in FIG. 2, the electric device 5 and the measuring device 6 are connected to the existing connector 8 of the board 7 of the electric device 5 by connecting the cable 9 of the takeover method, and connecting the existing cable 10 to the connector of the cable 9. It is done by connecting to 11.

A tool (program) of a well-known expert system is incorporated in the failure diagnosis device 3, and a measurement point for each inspection item, an operation item (procedure) for the battery / forklift 4, and a measurement point are stored in a memory and an external storage device. Normal / abnormal judgment data, probable causes and countermeasures corresponding to failures, replacement (ordering) parts list, circuit diagram of abnormal parts, other reference explanatory diagrams, formats such as reports printed out by the printer 21 The data of the condition part (abnormal measurement point) and the operation part (cause of failure), which are stored in advance, are set in the data of the expert system.

As shown in FIG. 3, the measuring device 6 inputs an analog-digital converter 12 which is an input unit to which the cable 9 is connected, a liquid crystal display device 13 which displays measurement data alarm contents, and measurement conditions. A numeric keypad switch 14, a mode selection switch 15 for switching off the power supply, a single use, and a failure diagnosis device 3, a light emitting diode 16 for assisting the liquid crystal display device 13, and displaying the number of accumulated data, etc. It is composed of a voice synthesizing board 17 and a speaker 18 for giving a message as contents by voice output, and a control device 19 composed of a microcomputer for integrally controlling these. The control device 19 of the measuring device 6 stores screen data for the liquid crystal display means 13 in advance and has an RS-232C interface board, and the control device 19 uses a communication cable 20 of RS-232C specification. It is connected to the failure diagnosis device 3 and configured to perform data communication. With the configuration of the measuring device 6 as described above, in addition to the function of performing the required measurement, the measuring device 6 has a function of selectively using it by itself and the failure diagnostic device 3, and inputs a measurement point when the failure diagnostic device 3 is used. ,
It is equipped with functions to perform measurements, store and output measurement data, and to display the operating status on a liquid crystal display, and to output voice messages.

Further, the failure diagnosis device 3 is equipped with a (coupler) modem as a communication means, and as shown in FIG. 5, via the public line 22a, the computer 24 of the service factory 23, the computer 24 and the public line 22b. It is configured to be connectable to the computer 26 of the service center 25. The high-level computers 25 and 26 store a wide range of information for each battery / forklift 4, such as history data, reference data, circuit diagrams, and more advanced judgment functions (expert system).

An example of the operation of the electro-mechanical system diagnostic device having the above-described configuration will be described with reference to the flowchart of FIG.

First, the service person connects the failure diagnosis device 3, the measurement device 6, and the electric device 5 with the cable 9 and the communication cable 20 (step F-1), and turns on the power supply of the failure diagnosis device 3,
The power is turned on so that the position where the failure diagnosis device 3 is used is selected by the key switch 14 of the measuring device 6 (step F-
2). When the power is turned on, the diagnostic program of the failure diagnostic device 3 is activated (step F-3). And
When the serviceman selects and inputs the mode of the inspection item using the keyboard 1 (step F-4), the failure diagnosis device 3 judges this mode (step F-5) and determines the mode (inspection item). An operation item (procedure) and a measurement point are searched (step F-6), and an operation instruction is output to the CRT 2 and the measuring device 6 according to the operation procedure (step F-7).
6 and 7 show examples of CRT2 screens according to operation instructions. In addition, in response to the operation instruction, the measuring device 6 is, for example, the sixth
The voice message "Please turn on the key switch" similar to the message of CRT2 in the figure is output (step F-8). The serviceman operates the battery fork 4 according to the operation instruction, When the user responds by pressing (step F-9), the failure diagnostic device 3 confirms the end of the operation (step F-10), and the measuring device 6
The measurement is instructed to (step F-11). Then, the measuring device 6 measures the measuring points previously written in the ROM, stores the measured data in the RAM, and displays the accumulated data number on the light emitting diode 16 (step F-12). Then, the failure diagnostic device 3 interactively steps F-7 to F-13 until the operation item (procedure) is completed (until the measurement is completed).
The measurement device 6 is made to collect the data of the measurement points after the operation is repeated, and when the measurement is completed, the measurement data is transferred from the RAM of the measurement device 6 to the data file and input to create the data table (step F-14). , Failure analysis by an expert system is performed, and it is determined whether the failure is normal or not (step F-1
5) Display the conclusion on CRT2 (step F-16). FIG. 8 shows an example of the CRT screen when the measurement data is transferred from the measuring device 6 to the failure diagnosis device 3, and FIG. 9 shows an example of the CRT 2 screen when there is a failure. In the case of a failure, the probable cause of the failure, the processing content method (repair method), the ordering (replacement) parts list, and the reference explanatory diagram or the circuit diagram of the failure location are output. The serviceman returns to step F-4 to continue the diagnosis, reselects the mode, and when finished, turns off the power of the failure diagnosis device 3 and the measurement device 6, removes the cable 9 and the communication cable 20. The process ends (steps F-17 to F19). Also,
The serviceman operates the keyboard 1 at any time to operate the printer 21.
Print the screen of CRT2 by driving.

Thus, if the service person inputs the inspection item, he or she can know whether it is normal or broken by operating the battery fork 4 sequentially in accordance with the operation instruction by the interactive method, and in the case of the failure, the probable cause, Since the reference method such as the countermeasure method, the list of ordered parts, and the circuit diagram of the failure location is output, even a newcomer can easily and quickly eliminate the failure. In addition, it is possible to prevent accidental mistakes, beliefs and oversights by skilled workers. In addition, the screen of CRT2 can be printed out and stored at appropriate times.

Further, as shown in FIG. 5, when connected to the upper computer 24 or 26 via the public lines 22a and 22b,
The failure diagnosis device 3 inputs the information of the battery / forklift 4 to be diagnosed, for example, history data, and if there is a past failure point in the history data, the failure diagnosis apparatus 3 should focus the diagnosis on that point, step F- in FIG. At 6, the diagnostic level is changed so that the operation item is changed and the measurement data at that location is particularly collected. Further, after the analysis in step F-15 is completed, the analysis result is output and the information of the upper computer 24 or 26, for example, history data is updated to the latest one. Further, the failure diagnosis device 3 outputs the measurement data to the higher-level computer 24 or 26, performs high-level diagnosis using the expert system of the higher-level computer 24 or 26, inputs the diagnosis result, and makes a conclusion. It can also be displayed on CRT2.

By changing the diagnosis level in this way, a deep level diagnosis can be performed, and it becomes possible to identify the abnormal portion or shorten the time, and it is possible to shorten the diagnosis time. Further, by updating the history data, it is possible to always supply effective data at the next diagnosis or when a failure occurs. In addition, the service person uses the failure diagnosis device 3 to
The information stored in the upper computer 24, 26 can be called, for example, the operation of each part of the battery / forklift 4 can be confirmed, and the high level can be obtained by using the expert system of the upper computer 24, 26. Can be diagnosed.

Further, since the failure diagnosis device 3 is composed of a computer, the software has expandability, and it is possible to easily change to a different type of electro-mechanical system device.

Further, by using the cable 9 of the take-over type, the measuring device 6 can be easily and quickly connected to the electric device 5, and the working efficiency can be improved.

Furthermore, the measuring device 6 and the failure diagnosis device 3 are portable,
With the three power supply system, it can be carried and used anywhere in the world.

Furthermore, using the printer 21, the analysis (diagnosis) results can be
An inspection report or invoice in the prescribed format as shown in Fig. 10 is created, which can reduce the clerical work of service personnel, improve work efficiency, and manage forms. .

In this embodiment, the history data is stored in the high-level computer 24
Alternatively, it is stored in 26, but it may be stored in the failure diagnosis device 3 sequentially.

When single use is selected by the mode selection switch 15, the measurement results at all measurement points can be displayed.

As described above, according to the present invention, when an inspection item is input,
The failure diagnosis of the inspected electrical device is executed simply by operating according to the operation items displayed on the display means below, and in the case of failure, the probable cause corresponding to the failure, the countermeasure method, the replacement parts list, and the circuit diagram of the abnormal location Is output to the display means, so even newcomers can diagnose and eliminate failures (repair)
It is possible to easily carry out the steps, prevent accidents by mistake of expert, mistakes and oversights, and improve work efficiency.

Furthermore, according to the second aspect of the present invention, since the mistake in the operation is corrected by adopting the interactive mode, even a new person can definitely execute the failure diagnosis.

According to the third aspect of the present invention, the history data can be managed by accumulating the analysis result data at the time of diagnosis, and the history data accumulated at the time of the next diagnosis can be effectively supplied at the time of the actual failure. .

According to the fourth aspect of the invention, since the analysis result and the like are printed out as a report, the service person can obtain an accurate report, can reduce clerical work, and can improve work efficiency. You can also manage the votes.

Further, according to the fifth aspect of the present invention, by connecting the device above the failure diagnosis device by the communication means, it is possible to obtain the information of the inspected electro-mechanical system device, for example, history data, and according to the history data. The diagnosis level can be changed by increasing or decreasing the number of operation items and measurement points, and the time until the identification of the abnormal part can be shortened, and the diagnosis time can be shortened. Further, by outputting the analysis result, the upper device can update and manage the information, for example, the history data.

Further, according to the sixth invention, a high level diagnosis can be performed by outputting the measurement data of the measurement points of the electromechanical system device to be inspected to the higher level device, and a high level diagnosis result can be obtained. it can.

According to the seventh aspect of the present invention, by simply connecting the cable of the interception type to the existing connector, the measuring device and the electrical device under test can be connected.
The mechanical system can be connected easily and quickly, and it is not necessary to modify the inspected electro-mechanical system device, so that the working efficiency can be improved. In addition, it is possible to deal with (fault) diagnosis of ready-made vehicles.

[Brief description of drawings]

1 to 10 show an embodiment of a diagnostic device for an electro-mechanical device of the present invention. FIG. 1 is an overall configuration diagram, and FIG. 2 is a schematic diagram showing connection between a measuring device and an electrical device. FIG. 3, FIG. 3 is a block diagram of the measuring device, FIG. 4 is a flow chart for explaining the diagnostic operation, FIG. 5 is a diagram showing the connection between the failure diagnosing device and the host device, and FIGS. Are CRT screen diagrams,
Figure 10 shows the format of the inspection report. 1 ... keyboard (input means), 2 ... CRT (display means), 3 ... failure diagnosis device, 5 ... electric device, 6 ... measuring device, 8 ... connector, 9 ... cable (pre-emption method) , 21 …… Printer, 24,26 …… Computer (upper device).

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takehiko Okuda 1-15-10 Kyomachibori, Nishi-ku, Osaka-shi, Osaka Toyo Transporter Co., Ltd. (72) Yoshitomo Kawahara 1-chome, Kyomachibori, Nishi-ku, Osaka No. 15-10 Toyo Transporter Co., Ltd. (56) Reference JP-A-58-163096 (JP, A) JP-A-63-78041 (JP, A) JP-A-64-52552 (JP, A)

Claims (7)

[Claims] 1. A measuring device for performing required measurement at a measuring point of an electromechanical system to be inspected, an input means and a display means, and a measuring point for each inspection item, an operation item, and a probable cause corresponding to a failure. A countermeasure method, a replacement part list, and a circuit diagram of an abnormal portion are stored in advance, measurement points are set in the measuring device according to the inspection items input from the input means, and display means displays the electric-mechanical system device to be inspected. Outputs the operation items and analyzes the result of the measurement data input from the measuring device according to the failure analysis tree to determine whether it is normal or not. In the case of failure, the probable cause, countermeasure method, and replacement parts list And a failure diagnosis device that outputs a circuit diagram of the abnormal portion and a reference explanatory diagram to the display means.
Diagnostic device for mechanical devices. 2. The diagnostic device for an electro-mechanical system device according to claim 1, wherein the failure diagnosis device sequentially outputs operation items to the display device while confirming the input of the response based on the inspection item input from the input device. . 3. The diagnostic device for an electro-mechanical device according to claim 1, wherein the failure diagnostic device stores data of an analysis result at each diagnostic time and manages history. 4. The printer is provided with a printer, and the failure diagnosis device outputs to the printer an analysis result at the time of diagnosis and a probable cause, a countermeasure method, a replacement part list, a circuit diagram of an abnormal part, and a reference explanatory diagram in case of failure. The diagnostic device for an electro-mechanical device according to claim 1, wherein a report is created. 5. A failure diagnosis device has a communication means, and inputs information of an electromechanical system device to be inspected from an upper device via this communication means, and changes a diagnosis level according to this information, The diagnostic device for an electro-mechanical device according to claim 1, further comprising outputting the analysis result at the time of diagnosis to the upper device via the communication means. 6. The fault diagnosis device has a communication means, and outputs the measurement data of the measurement point of the electromechanical system device to be inspected, which is input from the measurement device to the upper device via the communication means, and the communication is performed. The electro-mechanical system according to claim 1, wherein a high-level diagnostic result of the inspected electro-mechanical system device, which is performed on the basis of the measurement data in the upper apparatus, is input from the upper apparatus via means. Device diagnostic device. 7. The electro-mechanical system according to claim 1, wherein the measuring device is connected to the electro-mechanical system device to be inspected by connecting a cable of a take-over method to an existing connector of the electro-mechanical system device to be inspected. Device diagnostic device.