JPH06195020A - Fault diagnostic education supporting - Google Patents

Abstract

PURPOSE:To enable one learner to master the technique of fault diagnosis and inspection of a practicable use level without requiring a skilled educator by changing the electrical values between the terminal of a simulated circuit board in accordance with the instruction to generation of simulated trouble from a simulated fault instructing means and simulatively reproducing the fault state of an apparatus. CONSTITUTION:A central processor randomly determines a fault point when a power source to this fault diagnostic education supporting device is turned on. For example, the fault state that the connecting line of the main valve of a gas hot water supply device is assumed to be disconnected is simulatively reproduced at this time. The learner successively clicks the power source button and run button displayed on a display by means of a mouse. A combustion lamp does not flicker and the video of the spark splashing from the igniter of the gas hot water supply device is displayed when a hot water feed cock button is clicked after the above-mentioned operation. The learner recognizes abnormality, clicks a hot water supply cock button and measures the resistance value between terminals 39 and 40 of the simulated circuit board 57 by a tester. The learner, thereupon, recognizes the disconnection by knowing the resistance value increased to infinity and exchanges parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis education support device for educating maintenance personnel on a method of equipment failure diagnosis.

[0002]

2. Description of the Related Art In many electronic devices and control devices, once installed, a maintenance staff must go to the installation site of the device at the time of failure or inspection. For example, after installation, the gas water heater has a service system in which a maintenance staff visits the site and repairs upon receipt of a malfunction notification from the user. Therefore, maintenance personnel are required to have knowledge of equipment failure diagnosis and repair technology. In addition, the maintenance work has become complicated due to the sophistication of electronic equipment and control equipment these days, and the burden on maintenance personnel is heavy, and it is important to educate maintenance personnel in advance. .

Conventionally, maintenance personnel have been trained by skilled personnel, but since there are problems of labor shortage and labor costs, maintenance personnel can learn repair and inspection techniques by themselves without a skilled educator. Is desired.

Therefore, an education support device for supporting the education of maintenance personnel has been proposed, for example, Japanese Patent Laid-Open No. 2827/1990.
Japanese Patent Publication No. 79 describes an educational support device that allows a maintenance staff, that is, a learner to master a "fault check and countermeasures" by himself by operating a terminal.

[0005]

In the above-mentioned conventional education support device, the mechanism of displaying a specific failure on the display of the terminal and inputting the action for the failure is merely a matter of looking at the display. Since it is only learned by key operation, it is not realistic and only the knowledge on the desk can be obtained.

[0006] However, when the maintenance personnel face a failure of the equipment at the site, first the diagnostic work such as measuring the voltage of the circuit portion of the equipment and checking the resistance value is performed to find the cause of the failure, and then the failure location is checked. Since it is usual to repair, beginners who have no experience of actually measuring the voltage or checking the resistance value can use the conventional educational support equipment to perform fault diagnosis work at the site of the fault and repair of the fault part. I couldn't master
There is a problem in that it is impossible to diagnose and repair the situation successfully and promptly at the actual site.

The present invention has been made in view of the above points, and provides an educational support device which enables one learner to master realistic failure diagnosis and inspection skills without the need for a skilled educator. With the goal.

[0008]

In order to achieve the above object, the present invention provides a storage device for storing a simulated failure pattern corresponding to a device failure and an instruction for generating a simulated failure based on the simulated failure pattern. Simulated failure instructing means, a simulated circuit board having a terminal in which an electric value corresponding to an electric value of a predetermined portion of an electric circuit inside the equipment appears, and which can be contacted for measurement from the outside, and simulated failure instructing means The simulated operation display means for displaying the operation of the device when the simulated failure instructed by the device occurs, and the electrical value of the terminal of the simulated circuit board based on the simulated failure generation instruction from the simulated failure instruction means. And a simulation operation generating means for inputting a failure location as a result of failure diagnosis based on a measured value of an electric value of a terminal of the simulation circuit board by a learner. And construction of the trouble diagnosis training support device to display the operation of the device when the repaired inputted failure position by the stage.

[0009]

With the above-described structure, the present invention simulates the failure state of the device by changing the electrical value of the terminal of the simulated circuit board based on the simulated failure generation instruction from the simulated failure instruction means. Therefore, the learner can master the skill of failure diagnosis and repair under almost the same conditions as in the field by measuring the electrical value of the terminal of the simulated circuit board.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

In this embodiment, the present invention is applied to failure diagnosis education of a gas water heater.

FIG. 1 is a block diagram of a failure diagnosis education support device according to the present invention.

Reference numeral 56 denotes a storage device, which is the central processing unit 51.
A failure diagnosis education program to be executed in and failure patterns to be simulated are stored. Simulated circuit board 5
7 is provided with a circuit board having the same appearance as the electronic circuit board provided in the gas water heater, and the voltage, current and resistance value of each terminal on this circuit board are determined by the central processing unit 51.
According to the signal from, the same state as when the gas water heater fails is generated on this circuit board in a pseudo manner.
The display 52 displays an instruction to the maintenance staff, that is, a learner, on how to proceed with learning, and also displays auxiliary information for failure diagnosis such as a failure diagnosis flowchart and a circuit board connection diagram. From the speaker 53, a simulated operation sound such as a fan rotation sound of the gas water heater or a sound of water flowing out is output, so that the learner can have a realistic feeling. The learner determines a component considered to be defective by measuring the voltage of each terminal on the electronic board provided on the simulated circuit board 57 with a tester, and inputs the diagnosis result using the keyboard 54 and the mouse 55. .

FIG. 2 shows the top panel of the simulated circuit board 57.

Reference numeral 58 is a schematic circuit board having the same appearance as the electronic circuit board built in the gas water heater. The electronic circuit board in the actual gas water heater is connected to the gas water heater by two connectors, and in the simulated circuit board 57, the connectors 59 arranged in the same arrangement as the connectors are provided on both sides of the circuit board 58. The learner measures the voltage and the like of each terminal of the connector 59 with a tester to make a failure diagnosis. The terminal numbers 21 to 42, which are the same as the terminal numbers in the wiring diagram of the electronic circuit board of the gas water heater shown in FIG. 3 later, are written on the respective terminals of the connector 59, and at the sides of the respective terminals, check the terminals. The possible component names and the check numbers 1 to 12 of the failure diagnosis flowchart shown in FIGS. 6 to 8 are written.

FIG. 3 is a connection diagram of the electronic circuit board of the gas water heater.

In this connection diagram, the same terminal number as the terminal numbers 21 to 42 shown in FIG. 2, the part name to which each terminal is connected, and the same check numbers 1 to 12 as shown in FIG. 2 are written on each terminal. Has been.

FIG. 4 is a list of normal measurement values for each terminal on the electronic circuit board of the gas water heater.

For example, in the check number 1 of the failure diagnosis flowchart shown in FIG. 6 later, the voltage at the terminals 21 and 22 shown in FIG. 2 is measured by a tester to check the leakage safety device, and the value is If the AC voltage is 90 to 110V, it is determined that the leakage safety device is normal.

FIG. 5 is a screen display layout of the display 52 shown in FIG.

Reference numeral 60 denotes a phenomenon display unit, which displays a notification from the user of the gas water heater that hot water does not come out from the gas water heater, a state of the gas water heater taken by a video camera, and the like. Reference numeral 61 denotes an auxiliary material display section, which is a wiring diagram of the electronic circuit board shown in FIG. 3 and normal measurement values of each terminal of the electronic circuit board shown in FIG. 4 so that they can be referred to at any time in failure diagnosis. A list or a failure diagnosis flowchart shown later in FIGS. 6 to 8 is displayed. Reference numeral 62 denotes a power button of the gas water heater. By clicking this portion with the mouse 55, the power of the gas water heater in the failure diagnosis education support device according to the present invention can be turned ON / OFF. Reference numeral 63 denotes an operation button of the gas water heater. By clicking this portion with the mouse 55, the gas water heater in the failure diagnosis education support device according to the present invention can be operated or stopped. 64
Is a hot water tap button of the gas water heater, and by clicking this portion with the mouse 55, the hot water tap (faucet) of the gas water heater in the failure diagnosis education support device according to the present invention can be opened or closed. .

6 to 8 are flow charts for diagnosing a failure of the gas water heater.

This flow chart shows the operation flow of the gas water heater together with the check points for failure diagnosis. In FIG. 6 to FIG. 8, the steps indicated by long circles are operations performed by a maintenance person, that is, a learner.

Next, the operation of the gas water heater will be described with reference to FIGS. 6 to 8.

First, in FIG. 6, the learner uses the mouse 55.
When the power button 62 of the display 52 is clicked, the power is turned on (F-1) and the earth leakage safety device is turned on (F-
2) The power supply fuse is turned on (F-3). Next, when the learner clicks the driving button 63 on the display 52 with the mouse 55, the gas water heater becomes in the operating state (F-
4), the operation lamp (see FIG. 3) is turned on (F-5).
Here, the central processing unit 51 confirms by the flame detector (see FIG. 3) that there is no flame before ignition of the gas water heater (F-
6).

If the flame detector detects that there is a flame, it means that the flame detector is abnormal. Therefore, the phenomenon indicator 60 of the display 52 blinks the combustion lamp (F-7). The blinking of the combustion lamp means an abnormality of the gas water heater, so the learner clicks the operation button 63 of the display 52 with the mouse 55 to cancel the operation state of the gas water heater (F-8), and to determine the cause of the abnormality. Removed (F-9)
After that, the operation button 63 is clicked to bring the gas water heater into an operating state again (F-4). A method of removing the cause of the abnormality will be described later.

If no flame is detected in step (F-6), the combustion lamp does not blink, so the learner clicks the hot water tap button 64 on the display 52 with the mouse 55 and the hot water tap of the gas water heater. Open (F-10). Then, an image of water flowing out from the gas water heater is displayed on the display 5
The phenomenon 53 of No. 2 is displayed, and a sound (for example, a jersey) from which water flows is output from the speaker 53.

Proceeding to FIG. 7, the water flow switch (see FIG. 3) is turned on by this flow of water (F-11), and the fan motor is turned on (F-12). At this time, if there is no abnormality in the fan motor or the like, an image of the fan rotating is displayed on the phenomenon display unit 60 of the display 52, and a sound of the fan rotating (for example, a boom) is generated by the speaker 53.
Output from. In step (F-13), the fan pressure is detected by the wind pressure switch (see FIG. 3).

If the wind pressure switch detects that there is no wind pressure, the combustion lamp is made to blink (F-14). The learner who has confirmed the blinking of the combustion lamp clicks the hot water tap button 64 of the display 52 with the mouse 55 to close the hot water tap of the gas water heater (F-15), and thereby the water flow switch is turned off (F-16). . The learner then uses the mouse 55
Then, the operation button 63 on the display 52 is clicked to release the operation state of the gas water heater (F-17). continue,
The fan motor is turned off (F-18), returning to FIG.
After removing the cause of the abnormality (F-9), the operation button 63 is clicked to put the gas water heater into the operation state again (F-
4).

If it is detected in step (F-13) in FIG. 7 that wind pressure is present, the igniter (ignition device) (see FIG. 3) is turned on (F-19). If there is no abnormality in the igniter or the like, an image of a spark is displayed on the phenomenon display unit 60 of the display 52, and a spark sound (for example,
It is output from the speaker 53. Subsequently, the main valve of gas (see FIG. 3) is opened (F-20), and the process proceeds to FIG. 8 to open the control valve (see FIG. 3) for adjusting the flow rate of gas to be supplied for controlling the thermal power of the gas water heater. (F-2
1). At this time, the flame detector (see FIG. 3) detects whether or not the igniter spark ignites the supplied gas (F
-22).

If there is no flame without ignition, the igniter is turned off (F-23), the gas main valve (see FIG. 3) is closed (F-24), and the gas control valve (see FIG. 3) is closed. (F-25) Then, returning to FIG. 7, the combustion lamp is made to blink (F-14). The learner who has confirmed the blinking of the combustion lamp clicks the hot water tap button 64 displayed on the display 52 with the mouse 55 to close the hot water tap of the gas water heater (F
-15), which turns off the water flow switch (F-
16). Then, the learner displays the display 5 with the mouse 55.
The operation button 63 of No. 2 is clicked to release the operation state of the gas water heater (F-17). Then, the rotation of the fan motor is stopped (F-18), the flow returns to FIG. 6, the cause of the abnormality is removed (F-9), and then the operation button 63 is clicked to put the gas water heater into the operation state again. (F-4).

If ignition is detected in step (F-22) in FIG. 8 and flame is detected, the combustion lamp is turned on (F-26), the igniter is turned off (F-27), and normal operation is performed. An image of hot water flowing out from the gas water heater (for example, an image of steam rising) is displayed on the phenomenon display unit 60 of the display 52 (F-28).

FIG. 9 shows the terminals 21 to 4 of the simulated circuit board 57.
2 shows a part of a connection diagram for generating the same voltage and the like as when the actual gas water heater is normal and when it is out of order.

Reference numeral 58 designates the same circuit board as in FIG.
Reference numerals 9 and 40 are the same as the terminals 39 and 40 for the original valve of FIG. The switch 67 and the coil 68 form a relay, and the switch 69 and the coil 70 form a relay.

HIG from the central processing unit 51 to the signal line 65
When the H signal is output, a current flows through the coil 68, a relay operates and the switch 67 is turned on, and the resistance value between the terminals 39 and 40 can be set to 0.8 kΩ. This resistance is
As shown in FIG. 4, it is a normal value between the terminals 39 and 40 for the original valve. In order to make this resistance value an abnormal value, the central processing unit 51 may output a LOW signal to the signal line 65 and turn off the switch 67. This makes terminal 3
The resistance value between 9 and 40 is infinite and becomes an abnormal value.

When a high signal is output from the central processing unit 51 to the signal line 66, a current flows through the coil 70, the relay operates and the switch 69 is turned on, and the terminals 39 and 40 are connected.
In the meantime, an alternating current of 100 V is applied. This voltage is a normal value between the terminals 39 and 40 for the original valve as shown in FIG. In order to make this voltage an abnormal value, the LOW signal is output from the central processing unit 51 to the signal line 66 and the switch 6
9 should be turned off. By doing this, the terminals 39, 40
The voltage between them becomes 0 and becomes an abnormal value.

Next, the operation of the failure diagnosis education support device according to the present invention will be described with reference to the failure diagnosis flowcharts shown in FIGS.

When the failure diagnosis and education support device is turned on, the central processing unit 51 shown in FIG. 1 randomly determines a failure location. As an example, assume that the connection line of the original valve is broken. In this case, the central processing unit 51 outputs the LOW signal to the signal line 65 shown in FIG.
Is turned off.

The learner uses the display 52 shown in FIG.
Click the power button 62 displayed above with the mouse 55 (F-1), and then click the drive button 63 with the mouse 55.
Click with (F-4). Then, the display 52
The operation lamp displayed on the phenomenon display section 60 is turned on (F-5).

Since there is no abnormality in the flame detector this time, the combustion lamp does not blink here. The learner who confirms this will push the hot water tap button 64 on the display 52 with the mouse 55.
Click with (F-10). Then, the phenomenon display unit 60
An image of water flowing out from the gas water heater is displayed on the screen, and a sound of water flowing out is output from the speaker 53 (F-
11) Subsequently, an image of the fan of the gas water heater rotating is displayed on the phenomenon display unit 60, and the sound of the fan rotating is output from the speaker 53 (F-12). The learner confirms that the combustion lamp does not flash at this point.

Next, the phenomenon display section 60 displays an image of a spark from the igniter of the gas water heater, and the speaker 53 outputs a spark sound (F-19). Then, the process proceeds to step (F-20) and step (F-21), but this time, since the connection line of the original valve is broken, gas is not supplied, so ignition does not occur, and the process proceeds to step (F-23). Continue (F-22). The phenomenon display unit 60 displays an image in which the spark from the igniter of the gas water heater disappears, and the speaker 53 stops outputting the spark sound (F-2.
3), the combustion lamp displayed on the phenomenon display section 60 blinks (F-14).

The learner recognizes the abnormality of the gas water heater and clicks the hot water tap button 64 with the mouse 55 (F-15).
Click the drive button 63 with the mouse 55 (F-1
7). At this time, the phenomenon display unit 60 displays an image in which the water flowing out from the gas water heater stops and the rotation of the fan stops, and the sound of the water flowing out of the speaker 53 and the rotation sound of the fan stop.

Here, the learner investigates the faulty part.
The learner uses the keyboard 54 and the mouse 55 to display the wiring diagram of the circuit board 58 shown in FIG.
The failure diagnosis flowchart shown in FIG. 8 is displayed, and the failure location is searched with reference to these. This time, since the spark from the igniter is displayed on the phenomenon display unit 60, it can be understood that there is an abnormality in the original valve opening and the control valve opening of the subsequent processing. Therefore, the learner first measures the resistance value between the terminals 39 and 40 of the simulated circuit board 57 shown in FIG. 2 with a tester. Then, it can be seen that the resistance value is infinite because the switch 67 shown in FIG. 9 is OFF.

The learner causes the phenomenon display section 60 to display the circuit board 58 with the keyboard 54 and the mouse 55, and clicks the original valve component of the displayed circuit board 58 with the mouse 55 (F-9). This mouse click means to replace the clicked part with a normal part.

After the cause of the failure has been removed, the learner again turns on the power button 62, the operation button 63, and the hot water tap button 64.
Click with the mouse 55 to check the operation of the gas water heater. Since the defective parts have been correctly replaced this time, an image of hot water flowing out of the gas water heater is displayed on the phenomenon display unit 60 of the display 52 as a normal operation (F-2).
8).

In the present embodiment, the central processing unit 51 randomly determines a failure point and causes the learner to find the failure point, but in the present invention, for example, the educator determines the failure point and the keyboard 54 is used. Of course, the failure diagnosis education support device may be operated according to the input by using the or mouse 55.

[0047]

As described above, according to the present invention,
The maintenance staff, that is, the learner, can actually measure the voltage on the simulated circuit board and check the resistance value to find out the cause of the failure, so make the experience of repair and maintenance work more realistic. The investigation work can be done smoothly at the site of the failed device.

Further, according to the present invention, it is possible for one learner to learn the equipment failure diagnosis without requiring an educator.

[Brief description of drawings]

FIG. 1 is a block diagram of a failure diagnosis education support device according to the present invention.

FIG. 2 shows a top panel of a simulated circuit board.

FIG. 3 is a wiring diagram of an electronic board of the gas water heater.

FIG. 4 is a list of normal measurement values of each terminal on the electronic board of the gas water heater.

5 is a screen display layout of the display shown in FIG.

FIG. 6 is a flow chart for failure diagnosis of the gas water heater.

FIG. 7 is a flow chart for failure diagnosis of the gas water heater.
Is the part following.

FIG. 8 is a flowchart for diagnosing a failure of the gas water heater.
Is the part following.

FIG. 9 is a part of a connection diagram for generating the same voltage or the like as when the actual gas water heater is normal or when the actual gas water heater fails, at each terminal of the simulated circuit board.

[Explanation of symbols]

 51 central processing unit 52 display 53 speaker 54 keyboard 55 mouse 56 storage device 57 simulated circuit board

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaru Kuramochi 6-50-5 Higashiohisa, Arakawa-ku, Tokyo (72) Inventor Toru Yokoyama 4-9-1 Inagekaigan, Mihama-ku, Chiba-shi A-506 (72) Inventor Toshiaki Suzuki 8-33-10-306 Tateishi, Katsushika-ku, Tokyo I-Net Dome 2 (72) Inventor Yumiko Tamura 4-3-18-210 Konakadai, Inage-ku, Chiba-shi, Chiba Prefecture

Claims (2)

[Claims] 1. A storage device for storing a simulated failure pattern corresponding to a failure of a device, a simulated failure instruction means for instructing the occurrence of a simulated failure based on the simulated failure pattern, and a predetermined portion of an electric circuit inside the device. A simulated circuit board having an electric value corresponding to the electric value of .apprxeq. And having a terminal that can be contacted for measurement from the outside, and a simulated failure indicated by the simulated failure instruction means have occurred in the device. The simulated operation display means for displaying the operation of the device in the case, and the simulated failure generation means for changing the electrical value of the terminal of the simulated circuit board based on the instruction to generate the simulated failure from the simulated failure instruction means. A learner is provided with input means for inputting a failure location as a result of failure diagnosis based on a measured value of an electrical value of the terminal of the simulated circuit board, and the simulated operation display means is the input means. A failure diagnosis education support device, which displays the operation of the device when the failure portion input by the device is repaired. 2. A simulation sound output means for outputting a simulation operation sound of the device when a simulation failure instructed to be generated by the simulation failure instruction means occurs in the device. Failure diagnosis education support device described.