JPH06195021A - Fault diagnostic education supporting - Google Patents

Abstract

PURPOSE:To enable one learner to more actually learn the operating state of an apparatus to be fault diagnosis with the education supporting device which enables the learner to have skillful knowledge by changing the electrical values between the terminals of a simulated circuit board in accordance with the instruction to generation of fault from a simulated fault instructing means and operating the simulated apparatus body by using this simulated circuit board to simulatively reproduce the fault state of the 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 reproduced at this time. An announcement 'hot water does not come out' is displayed on a display and the learner starts fault diagnosis. The learner inserts a power source plug 77 into a power source receptacle and turns on a run button 80 of an operation board. The water flows out and a combustion lamp does not flicker when a faucet for hot water supply is opened. The learner recognizes abnormality, closes the faucet for hot water supply and turns off the run button 80. The learner discovers the disconnection of the main valve by measuring the resistance between the terminals of the simulated circuit board and makes processing to exchange 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.

The above-mentioned conventional education support device has a mechanism in which a specific failure is displayed on the display of the terminal and a measure for the failure is input, but learning is simply performed by looking at the display and operating the keys. Therefore, it is unrealistic and can only be obtained from desk knowledge.

[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.

Therefore, on the same date as the present application, the present inventors provided a simulated circuit board corresponding to the circuit portion of the equipment, and a maintenance person, that is, a learner actually measured the voltage and checked the resistance value to cause a failure. We filed an application for a failure diagnosis education support device that enabled us to become familiar with the diagnosis method.

[0008]

However, in the above-mentioned application filed on the same day, the device main body is not provided although the simulated circuit board corresponding to the circuit part of the device is provided, but the device to be diagnosed is, for example, the gas water heater. Then, the operation status of the device such as whether a spark is flying from the ignition device or the fan is rotating has to be confirmed from the image displayed on the display and the operation sound from the speaker.

As described above, in the above-mentioned application filed on the same day, it is not possible to directly visually and visually confirm the condition of the device body. For this reason, it is not possible for the learner to experience how loud the device itself is and how loud the actual sound is.

The present invention has been made in view of the above points, and is more practical in an educational support device that enables one learner to master realistic failure diagnosis and inspection skills without the need for a skilled educator. The purpose is to be able to check the operating status of the device that is the target of failure diagnosis.

[0011]

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 Simulated failure generation means for changing the electrical value of the terminals of the simulated circuit board based on the instruction to generate the simulated failure from the simulated circuit board, the simulated device body that operates using the simulated circuit board, and the learner Input means for inputting a failure location as a result of failure diagnosis based on the measured value of the electrical value of the terminal and the operating state of the simulated device body,
A failure diagnosis education support device including correction means for correcting the electrical value appearing at the terminals of the simulated circuit board when the failure location is input by this input means to the electrical value that appears when the failure location is repaired. Configured.

[0012]

According to the present invention, with the above-described structure, the electrical value of the terminal of the simulated circuit board is changed based on the simulated failure generation instruction from the simulated failure instruction means, and the simulated device body is used by using this simulated circuit board. Can operate and simulate the failure state of the equipment, so you can master the skills of equipment failure diagnosis and repair under almost the same conditions as in the field.

[0013]

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 a 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.
Reference numeral 71 denotes a gas water heater main body, which is designed to operate by using the circuit board of the simulated circuit board 57 instead of the electronic circuit board originally provided. The gas water heater main body 71 is provided with a flame detector shown in FIG. 3 and other parts necessary for operation later. On the display 52, along with instructions on how to proceed with learning to maintenance personnel, that is, learners,
It displays auxiliary information for failure diagnosis such as failure diagnosis flowchart and circuit board wiring diagram. From the speaker 53, it is possible to output by voice a message that the user of the gas water heater does not generate hot water. 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 is a perspective view of the gas water heater main body 71.

Reference numeral 72 is an exhaust port for discharging combustion exhaust gas from the gas water heater main body 71, and reference numeral 73 is an ignition confirmation window.
74 is a gas supply port for supplying gas to the gas water heater main body 71, and 75 is a tap water supply port for supplying tap water to the gas water heater main body 71. Reference numeral 76 denotes a hot water supply port for supplying hot water warmed by the gas water heater body 71. A hot water supply faucet (not shown) is attached to the tip of the hot water supply port, and hot water is supplied by opening the hot water supply faucet. 77
Is a power plug for supplying power to the gas water heater main body 71 by inserting it into a power outlet. The gas water heater main body 71 is connected to the simulated circuit board 57 by two cables.

The operation of the gas water heater 71 is performed by the operation panel 78. That is, when the power plug 77 is inserted into the power outlet and the operation button 80 of the operation panel 78 is turned on, the operation lamp 81 is turned on and the gas water heater 71 is in the operating state. In this state, when the hot water supply faucet attached to the end of the hot water supply port 76 is opened, the combustion lamp 82 lights up and
Hot water flows from this hot water supply tap.

FIG. 3 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. This circuit board 5
As shown in FIG. 2, 8 is connected to the gas water heater main body 71 by two connectors, and in the simulated circuit board 57, a connector 59 in which each terminal drawn from each connection line of the connector is arranged in the same circuit is formed. It is provided on both sides of the substrate 58. The learner measures the voltage and the like of each terminal of the connector 59 with a tester to make a failure diagnosis. For each terminal of the connector 59,
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. 4, are written later, and the part names that can be checked at that terminal are shown beside each terminal, and later in FIG. ~ Check numbers 1 to 12 of the failure diagnosis flowchart shown in Fig. 9 are written.

FIG. 4 is a wiring diagram of the electronic circuit board of the gas water heater.

In this connection diagram, each terminal has the same terminal number as the terminal numbers 21 to 42 shown in FIG. 3, the part name to which each terminal is connected, and the same check numbers 1 to 12 as in FIG. Has been.

FIG. 5 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 in the failure diagnosis flowchart shown in FIG. 7 later, the voltage at the terminals 21 and 22 shown in FIG. 3 is measured by a tester to check the leakage safety device. If the AC voltage is 90 to 110V, it is determined that the leakage safety device is normal.

FIG. 6 is a screen display layout of the display 52 shown in FIG.

Reference numeral 60 denotes a phenomenon display section, which displays a notification from the user of the gas water heater that hot water does not come out from the gas water heater. Reference numeral 61 is an auxiliary material display section, which is a wiring diagram of the electronic circuit board shown in FIG. 4 and normal measurement values of each terminal of the electronic circuit board shown in FIG. A list or a failure diagnosis flowchart shown later in FIGS. 7 to 9 is displayed.

7 to 9 are flow charts for failure diagnosis of the gas water heater.

This flowchart shows the operation flow of the gas water heater together with the check points for failure diagnosis. In FIGS. 7 to 9, steps indicated by long circles are operations performed by a maintenance person, that is, a learner.

Next, the operation of the gas water heater main body 71 will be described with reference to FIGS. 7 to 9.

First, in FIG. 7, when the learner inserts the power plug 77 (see FIG. 2) into the power outlet (F-
1), the earth leakage safety device in the gas water heater main body 71 becomes conductive (F
-2), the power supply fuse in the gas water heater body 71 becomes conductive (F-3). Next, when the learner turns on the operation button 80 (see FIG. 2) of the operation panel 78, the gas water heater main body 71 enters the operation state (F-4), and the operation lamp 81 of the operation panel 78.
(See FIG. 2) lights up (F-5). Here, the gas water heater body 71 confirms that there is no flame before ignition by the flame detector (see FIG. 4) in the gas water heater body 71 (F-
6).

If the flame detector detects that there is a flame, it means that the flame detector is abnormal, and the combustion lamp 82 (see FIG. 2) of the operation panel 78 is blinked (F-7). The blinking of the combustion lamp 82 means an abnormality of the gas water heater main body 71, so the learner has to press the operation button 8 on the operation panel 78.
0 is turned off and the gas water heater main body 71 is stopped (F
-8), After removing the cause of the abnormality (F-9), the operation button 80 is turned on to put the gas water heater into the 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 82 of the operation panel 78 does not blink, and the learner uses the hot water supply faucet ahead of the hot water supply port 76 (see FIG. 2). Open (F-10). Then, water flows out from the hot water supply faucet attached to the gas water heater main body 71.

Proceeding to FIG. 8, the water flow switch (see FIG. 4) in the water heater main body 71 is turned on by this flow of water (F-1
1), turn on the fan motor in the water heater main body 71 (F
-12). At this time, if there is no abnormality in the fan motor or the like, the fan in the water heater main body 71 rotates. In step (F-13), the rotation of the fan is detected by the wind pressure switch (see FIG. 4) in the water heater body 71.

If the wind pressure switch detects that there is no wind pressure, the combustion lamp 82 of the operation panel 78 blinks (F-
14). The learner who has confirmed the blinking of the combustion lamp 82 closes the hot water supply faucet in front of the hot water supply port 76 (F-15), and thereby turns off the water flow switch (F-16). Subsequently, the learner turns off the operation button 80 of the operation panel 78 to put the gas water heater main body 71 in a stopped state (F-17). continue,
The fan motor is turned off (F-18) and returns to FIG.
After removing the cause of the abnormality (F-9), the operation button 80 is turned on to bring the gas water heater main body 71 into the operation state again (F
-4).

If it is detected in step (F-13) of FIG. 8 that wind pressure is present, the igniter (ignition device) (see FIG. 4) in the gas water heater body 71 is turned on (F-1).
9). If there is no abnormality in the igniter or the like, it can be confirmed from the ignition confirmation window 73 that the sparks fly. Then, the main valve (see FIG. 4) of the gas in the gas water heater body 71 is opened (F-
20), proceeding to FIG. 9, the gas water heater main body 71 for adjusting the flow rate of gas to be supplied for adjusting the heating power of the gas water heater main body 71
Open the control valve inside (see Figure 4) (F-21). At this time, the flame detector (see FIG. 4) detects whether or not the igniter spark ignites the supplied gas (F-2).
2).

If there is no flame without ignition, the igniter is turned off (F-23), the gas main valve (see FIG. 4) is closed (F-24), and the gas control valve (see FIG. 4) is closed. (F-25), returning to FIG. 8, the combustion lamp 82 is blinked (F-14). The learner who has confirmed the blinking of the combustion lamp 82 closes the hot water supply faucet in front of the hot water supply port 76 (F-1).
5), which turns off the water flow switch (F-1
6). Subsequently, the learner turns off the operation button 80 of the operation panel 78 to put the gas water heater main body 71 in a stopped state (F-
17). Then, the rotation of the fan motor is stopped (F-1
8) Then, returning to FIG. 7, the cause of the abnormality was removed (F-9).
After that, the operation button 80 is turned on and the gas water heater main body 71 is again turned on.
To the operating state (F-4).

If ignition is detected in step (F-22) in FIG. 9 and flame is detected, the combustion lamp 82 of the operation panel 78 is turned on (F-26) and the igniter is turned off (F-27). ), The water flowing out from the gas water heater main body 71 becomes hot water as a steady operation (F-28).

FIG. 10 shows the terminals 21 to 21 of the simulated circuit board 57.
At 42, a part of the 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 is shown.

Reference numeral 58 denotes the same circuit board as that shown in FIG.
Reference numerals 9 and 40 are the same as the terminals 39 and 40 for the original valve in 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, so that the resistance value between the terminals 39 and 40 becomes a normal value between the terminals 39 and 40 for the original valve.
To make this resistance value an abnormal value, the central processing unit 51
Output a LOW signal to the signal line 65 and turn off the switch 67. In this case, the resistance value between the terminals 39 and 40 is infinite and becomes an abnormal value.

Further, 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.
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 is shown in FIG.
The LOW signal is output to the signal line 65 shown in
Turn 7 off.

The phenomenon display section 60 of the display 52 (see FIG.
(See), a message from the user of the gas water heater that hot water will not come out is displayed, and the learner will start the failure diagnosis. The learner inserts the power plug 77 shown in FIG. 2 into a power outlet (F-1), and then turns on the operation button 80 of the operation panel 78 (F-4). Then, the operation panel 7
The operation lamp 81 of No. 8 is turned on (F-5).

Since there is no abnormality in the flame detector this time, the combustion lamp 82 of the operation panel 78 does not blink here. The learner who confirms this opens the hot water supply faucet beyond the hot water supply port 76 (F-10). Then, water flows out from the hot water supply faucet (F-11), and subsequently the fan in the water heater main body 71 rotates (F-12). At this point, the learner confirms that the combustion lamp 82 does not blink.

Next, it can be confirmed from the ignition confirmation window 73 (see FIG. 2) that sparks fly from the igniter in the gas water heater body 71 (F-19). Then, step (F-2
0), the process proceeds to step (F-21), but this time, since the connecting line of the original valve is broken, gas is not supplied, so ignition does not occur, and the process proceeds to step (F-23) (F-22).
From the ignition confirmation window 73, it can be confirmed that the spark from the igniter is extinguished (F-23), and the combustion lamp 82 of the operation panel 78 is displayed.
Blinks (F-14).

The learner recognizes the abnormality of the gas water heater main body 71 and closes the hot water supply faucet in front of the hot water supply port 76 (F-15).
The operation button 80 is turned off (F-17). At this time, the water flowing out from the hot water supply faucet stops, and it can be confirmed from the exhaust port 72 that the rotation of the fan in the water heater main body 71 has stopped.

Here, the learner investigates the failure point.
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. 9 is displayed, and the failure location is searched with reference to these. Since the spark from the igniter can be confirmed from the ignition confirmation window 73 this time, it can be seen 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. 3 with a tester. Then, the switch 67 shown in FIG.
It can be seen that the resistance value is infinite because it is F.

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. As the processing of the central processing unit 51, the signal line 6 shown in FIG.
A HIGH signal is output to 5 and the switch 67 is turned ON.

After removing the cause of the failure, the learner turns on the operation button 80 again, opens the hot water supply tap, and confirms the operation of the gas water heater. This time, the faulty parts were replaced correctly, so the water flowing out of the hot water supply faucet becomes hot water during normal operation (F-28).

In the present embodiment, the central processing unit 51 randomly determines a failure point and causes the learner to find the failure point. 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.

[0053]

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 failure diagnosis of equipment without requiring an educator.

Further, according to the present invention, since the condition of the device body can be directly confirmed visually and audibly, the size of the device body and the actual sound can be determined. The learner can even experience whether the sound is loud.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a gas water heater body.

FIG. 3 shows a top panel of a simulated circuit board.

FIG. 4 is a wiring diagram of an electronic board of the gas water heater.

FIG. 5 is a list of measurement normal values of each terminal on the electronic board of the gas water heater.

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

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

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

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

FIG. 10 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 gas heater is out of order 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 71 gas water heater main body

Front page continuation (72) Inventor Masaru Kuramochi 6-50-5 Higashiohisa, Arakawa-ku, Tokyo (72) Inventor Toru Yokoyama 4-9-1 Inagekaigan, Mihama-ku, Chiba, Chiba Prefecture A-506 (72) Inventor Suzuki Toshiaki 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

Claims (1)

[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 the simulated circuit based on the simulated fault generation instruction from the simulated fault instruction means. Simulated failure generating means for changing the electric value of the terminal of the board, a main body of the simulated device which operates using the simulated circuit board, and a learner measuring the electric value of the terminal of the simulated circuit board. Input means for inputting a failure location as a result of failure diagnosis based on a value and the operating state of the simulated device body, and an electrical device appearing at the terminal of the simulated circuit board when the failure location is input by the input means. Failure diagnosis education support device, comprising: a correction unit that corrects such a value to an electrical value that appears when the fault location is repaired.