JP2003028479A - Equipment inspection supporting device for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment inspection supporting device for an air conditioner, which is capable of producing tables in a short time without necessitating any skill for an inspection work and, further, capable of recording the wave form of vibration itself. SOLUTION: The equipment inspection supporting device 10 for the air conditioner is constituted of terminal instruments 12 carried by a measuring person and a diagnosis unit 14 for receiving an information from the terminal instruments 12 to effect diagnosis. A CCD 18 and an oscillation sensor 20, attached to an objective matter of the measurement to detect the oscillation of the objective matter of the measurement, are connected to the main body 16 whereby an image picked up by the CCD 18 or wave form data obtained by the oscillation sensor 20 can be taken into the main body 16. On the other hand, the diagnosis unit 14 is provided with a second PHS 28 for effecting transmission and reception between the first PHS 26 and is connected to a PC 30. When the PC 30 receives an image, a wave form data, a temperature data or the result of appearance inspection, the results of measurement are compared with a data base in the PC 30 to diagnose whether an abnormality has occurred in the air conditioner or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility inspection support device for an air conditioner, and more particularly to a device for assisting the inspection work of an air conditioning facility in a nuclear power plant or the like.

[0002]

2. Description of the Related Art In an air conditioner in a nuclear power plant, for the purpose of improving reliability, early detection of failure, and quick recovery, it is regularly inspected and the inspection record is kept.

Conventionally, in the inspection of the air conditioning equipment, a measurer carries a recording sheet and first writes the name and inspection date of the air conditioning equipment. Then, the measurer measures the vibration in the air conditioner with a vibration sensor to obtain an equivalent peak value (: effective value × √2) of the displacement waveform. Furthermore, the measurer measures the temperature of the air-conditioning equipment and investigates whether oil leaks, unusual odors, or abnormal noises have occurred, fills out this on a recording sheet, and then records it on a computer installed in the office. Was input to compare with past data and output the form.

[0004]

However, in the above-mentioned conventional inspection method, since it is necessary to accurately represent and record the operation status of the equipment, there is a restriction that a measuring person must be in charge of a skilled person. there were. Such restrictions are against the recent shortage of skilled personnel and reduction of work costs related to inspections. Therefore, there is a demand for an inspection support device that enables anyone to easily perform inspection work and create forms in a short time. It was rare.

Further, in the above-mentioned conventional method, the vibration data of the air conditioner is represented by a single numerical value as an equivalent peak value obtained by measuring the displacement for several seconds. However, when it is desired to examine the vibration waveform itself in detail, These waveform data were not recorded as a database, and there was a risk that data for examination would be insufficient.

The present invention pays attention to the above-mentioned conventional problems, requires no skill for inspection work, and can form a form in a short time.
Another object of the present invention is to provide a facility inspection support device for an air conditioner that can record the vibration waveform itself.

[0007]

According to the present invention, an equipment inspection support device for an air conditioner is provided with a terminal device capable of collecting data, and the data collected by this terminal device is taken in to perform arithmetic processing of the data. This is made based on the knowledge that if it is configured with a diagnosis unit, no expert is required, inspection can be performed easily, and more detailed waveform data can be captured.

That is, the equipment inspection support device for an air conditioner according to the present invention comprises an information input section for taking in information from the air conditioning equipment to be inspected and a first communication section for transmitting the information taken in by this information input section. And a second communication unit that receives the information transmitted from the first communication unit, and performs a calculation process on the information received by the second communication unit. Is configured as a database and a diagnostic unit having a control means.

The information input section has at least an image pickup means and a vibration sensor, and the control section fetches an image from the image pickup means and an equivalent peak value from the vibration sensor into the database, It is desirable to connect a communication means to one communication unit and the second communication unit,
Furthermore, the sampling period of the vibration sensor is set to 1 KHz.
To 10 KHz, and the sampling time of the vibration sensor is preferably set to 1 to 5 seconds.

Further, alarm means is connected to the first communication section,
The control unit activates the alarm unit when the calculation result of the information received by the second communication unit is out of a preset range of the database, or the control unit causes the first communication unit to operate. Connect the screen display,
The control means selects a defect similar to the calculation result of the information received by the second communication unit from the database,
The defective item may be displayed on the screen display unit.

The facility inspection support device for an air conditioner according to the present invention can also be expressed as follows. That is, the equipment inspection support device for an air conditioner according to the present invention is a portable terminal device for recording vibration and temperature measurement data in an air conditioner such as a blower, an exhaust fan, or a refrigerator, and a visual inspection result. Have In addition to the above-mentioned terminal equipment, this apparatus also has a diagnostic unit that is located away from the air conditioning equipment and stores measured data and inspection results as a database.

Data is transmitted and received between the terminal device and the diagnosis unit of the equipment inspection support device having the above-mentioned configuration by data communication using PHS. In addition, the terminal device and the diagnostic unit display on the screen the image of the measurement site, the measured vibration waveform, and the equivalent peak value obtained by data processing of the vibration waveform. Configured to allow conversation. It is desirable that the vibration measurement sampling period is about 1 KHz to 10 KHz, and the sampling time is 1 second to 5 seconds.

When the measured vibration data or temperature data exceeds a predetermined increase rate or control value as compared with the past data, it is desirable to display an alarm on the terminal device, and further the appearance inspection on the screen of the terminal device. It is preferable to display the case of the result and select the corresponding item from the list to list the causes of possible problems together with the tendency of the vibration and the temperature measurement value and display them on the screen.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred specific embodiments of an equipment inspection support device for an air conditioner according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of an equipment inspection support device for an air conditioner according to this embodiment.

As shown in the figure, an equipment inspection support device 10 for an air conditioner according to the present embodiment receives a terminal device 12 carried by a measurer, and receives information from the terminal device 12 for diagnosis. And a diagnostic unit 14 for The main body 16 of the terminal device 12 has a C serving as an imaging means.
A CD camera 18 (hereinafter referred to as CCD 18) and a vibration sensor 20 that is attached to a measurement object and detects vibration of the measurement object are connected to each other, and an image captured by the CCD 18 and waveform data from the vibration sensor 20 are connected. Can be taken into the main body 16.

Further, the main body 16 has a screen display portion for displaying an image and waveform data taken in by the CCD 18 and the vibration sensor 20, and a pen input function so that a measurer can directly input data. Therefore, the appearance inspection results such as equipment temperature, oil leak, strange odor, and abnormal sound can be input to the main body 16.

Further, a headphone 24 with a microphone (hereinafter referred to as headphone 24) is attached to the main body 16 and is connected to a diagnostic section 14 side which will be described later via a communication circuit as a communication means (not shown) in the main body 16. It is possible to call. In this way, the main body 16 has a CC
D18, vibration sensor 20, screen display unit, headphones 2
4 are connected or provided, but these main bodies 16
The constituent elements are connected to the first PHS 26, which is the first communication unit for transmitting and receiving data.

On the other hand, the diagnosis unit 14 constituting the facility inspection support device 10 for the air conditioner has a second PHS 28 for transmitting / receiving to / from the first PHS 26.
A computer 30 (hereinafter, referred to as a PC 30) that serves as a control unit is connected to the HS 28. PC30 concerned
When receiving image and waveform data from the terminal device 12 via the second PHS 28, temperature data input by a measurer, or appearance inspection results such as equipment temperature, oil leak, strange odor, and abnormal sound, PC measurement results
The equivalent peak value can be calculated by recording in a database in 30 or by a preset calculation process.

By the way, a PDX (Private Branch Exchange) 32 and an antenna 33 are provided in the premises where the terminal equipment 12 is used. By arranging the antenna 33 at various places in the building, the transmission output of the terminal equipment 12 is measured in milliwatts. It can be reduced to a certain degree, and it is possible to avoid obstacles such as devices and walls to communicate.

A procedure for inspecting an air conditioning facility installed in a nuclear power plant using the facility inspection support device 10 for an air conditioner thus configured will be described. FIG. 2 is a flowchart showing the flow of processing in the terminal device and the diagnosis unit. As shown in the figure, when inspecting the air conditioning equipment installed in the nuclear power plant, first, the terminal device 12 and the diagnostic unit 14 are powered on and these devices are activated (step 100, step 110). ).

Then, in the diagnostic unit 14 located at a place distant from the air conditioning equipment, the number of the air conditioner to be inspected is set to PC3.
0 Select from internal database. If the air conditioner number is not registered in the database, the PC 30 may be operated to newly register it in the database (step 120). Then, after the number of the air conditioner to be inspected is set by the diagnosis unit 14, the line connection from the terminal device 12 is awaited (step 130).

After the diagnosis unit 14 is in a line connection waiting state, the inspector operates the terminal device 12 to perform a line connection operation to connect to the diagnosis unit 14 (step 14).
0), the diagnosis unit 14 first authenticates whether or not it is the terminal device 12 configuring the facility inspection support device 10 for the air conditioner (step 150). After the terminal device 12 is authenticated, the diagnosis unit 14 transfers the number of the air conditioner to be inspected to the terminal device 12 connected to the line (step 160).

After the air conditioner number list transmitted from the diagnosis unit 14 is received by the terminal device 12, the number list is displayed on the screen display unit of the main body 16, so that the inspector can display it on this screen display unit. An air conditioner to be diagnosed is selected from the list of numbers thus determined (step 170). After selecting the air conditioner to be diagnosed, the inspector confirms by using the headphones 24 and the CCD 18 by having a conversation with the person in charge of the diagnosis unit 14 side or transferring an image to the diagnosis unit 14 side. It is sufficient to take the steps or to keep in touch with each other regarding the precautions (step 180).

Between the terminal device 12 side and the diagnostic section 14 side,
After making confirmations, the vibration sensor 20 is attached to the air conditioner, the vibration data generated in the air conditioner is taken into the main body 16, and the inspector inputs the temperature data of the air conditioner and the appearance inspection result into the main body 16 by pen input. Yes (Step 19
0). Then, when the inspection of the air conditioner is completed, the inspector operates the main body and PDs the measurement data from the first PHS 26.
Transfer to the diagnosis unit 14 side via X32 (step 2)
00).

In the diagnostic unit 14 to which the measurement data is sent from the terminal device 12, the measurement data is transmitted to the PC 30, and thereafter, the transmitted measurement data is displayed in the PC 30 (step 210) and the database is stored. By comparing with the past value in, the data measured this time is automatically verified whether there is a large fluctuation. If the measured data exceeds the control value, PC3
A signal is emitted from 0 to the alarm means provided in the main body 16 (step 220, step 230). Terminal equipment 12
In (1), when the measurement of the air conditioner set at the beginning of the inspection is completed, the screen returns to the main screen, communication with the diagnostic unit 14 side is terminated, and the line is disconnected (step 240, step 250, step 260).

On the other hand, on the diagnostic unit 14 side, when all the measurement data is transferred from the terminal device 12, the measurement data is added to the database in the PC 30, and this database is saved and combined with past data. The form of the air conditioner is output (step 270). After outputting the form of an arbitrary air conditioner in this way, the diagnosis unit 14 returns to the main screen and then ends (step 280,
Step 290).

FIG. 3 is an image explanatory view showing a display screen of a terminal device which constitutes an equipment inspection support device for an air conditioner and a PC in a diagnostic section. As shown in (1) of the figure,
In the main body 16 of the terminal device 12, an air conditioner number display unit 34, an air conditioner name display unit 36, an air conditioner image display unit 38, a vibration waveform display unit 40, a vibration equivalent peak value display unit 42, An alarm display unit 44 and position selection buttons 46A to 46C for measurement points are provided. For example, in the state of step 190 in FIG. 2, each measurement item is displayed. Therefore, the inspector checks the display to check. It is possible to confirm whether the operation has been performed reliably.

On the other hand, on the screen of the PC 30 constituting the diagnosis section 14, the air conditioner number display section 46, the air conditioner name display section 48, the air conditioner image display section 50, and the vibration waveform display section 5 are displayed.
2. The vibration equivalent peak value display 54 is displayed. Then, the operator who operates the PC 30 can grasp the state of the air conditioner in the remote place by the screen of the PC 30.

By the way, in the present embodiment, it is possible to capture the waveform data of the vibration generated in the air conditioner. FIG. 4 is an explanatory diagram showing waveform data of vibration and a method of calculating an equivalent peak value from the waveform data.

In the present embodiment, the sampling interval Ts
Is 0.5 mS (sampling frequency: 2 kHz), the sampling time Tn is 3 seconds, and 6000 pieces of data are collected at one location. Then, the equivalent peak value is calculated from the following calculation formula.

[Formula 1]

The measurement points are usually in three axial directions (X axis, Y axis,
Since this is performed along the Z axis), the number of data items per location is 18,000. In addition, in the inspection in the air conditioner,
In addition to the vibration measurement, it is necessary to transmit the data of the image, the temperature, and the appearance inspection result, so that a measurement time of several minutes is required for each location. Further, in an air conditioner, there are usually 3 to 5 measurement points, so that it takes ten or more measurement times per air conditioner. Since the length of this measurement time is almost the same as the conventional inspection time, it is possible to prevent the inspection efficiency from decreasing.

Further, in the conventional measuring method, since the frequency range of the measuring instrument is 10 to 1000 Hz, the sampling frequency is set to 2 kHz according to the sampling theorem.
It is equivalent or better than the conventional one. In the facility inspection support device 10 for an air conditioner according to the present embodiment, by recording the waveform data of vibration itself, when a malfunction of the air conditioner occurs, the extent of the malfunction and the waveform data are compared and examined. This makes it possible to build basic data for future preventive diagnosis of air conditioners.

For example, various problems in the air conditioner can be estimated by performing frequency analysis of the displacement or the velocity obtained by differentiating the displacement with time, and the acceleration obtained by the second derivative. That is, the imbalance and misalignment of the rotating system, which is seen at a relatively low frequency (several hundreds of kHz or less), can be analyzed by frequency analysis of the displacement of the rotating shaft, and the rotating support system confirmed at a higher frequency. Looseness, fragility of the foundation where the air conditioner is installed, or electrical abnormality of the motor can be analyzed by frequency analysis of the speed of the rotating shaft. Damage to rolling bearings, wear and tear of gears, contact between rotating parts and stationary parts, etc., which can be seen at higher frequencies (several kHz), can be estimated from frequency analysis of acceleration.

FIG. 5 is a graph in which the equivalent peak value in the vibration data is plotted for each number of measurements. As shown in the figure, the control value of 30 microns is a value for which the condition of the air conditioner is judged to be unfavorable. In the PC 30, when the value of the equivalent peak value exceeds the control value, a display is displayed on the alarm display section 44 on the main body 16 side to warn the inspector.

Further, in the equipment inspection support device 10 for an air conditioner according to the present embodiment, even when the control value is reached, the rate of increase from the past measured value is calculated, and when the preset rate is exceeded. Also, the alarm display unit 44 is made to display. FIG. 6 shows a display screen that displays the cause and the countermeasure of the failure.

As shown in the figure, by displaying a display on the alarm display section 44, the inspector can notice the abnormality at the inspection site and re-measure to confirm the reliability of the data. become. Further, in the PC 30, when a problem occurs in the collected data, or when there is a possibility of such a problem, a possible cause of the problem can be listed and displayed. By displaying the cause of the assumed failure in this way, it is possible to determine which part of the device should be examined in detail by looking at this screen, and by using the headphones 24, the inspection site and the diagnostic unit can be used. By keeping close contact with the 14th division, thorough investigation and countermeasures can be promptly implemented.

[0037]

As described above, according to the present invention, the information input section for taking in information from the air conditioning equipment to be inspected and the first communication section for transmitting the information taken in this information input section are provided. It has a terminal device and a second communication unit for receiving the information transmitted from the first communication unit, performs arithmetic processing of the information received by the second communication unit, and stores the arithmetic result in a database. Since it is composed of a diagnosis unit having a control means for storing it, it is possible to create a form in a short time without requiring skill for inspection work, and to record the vibration waveform itself.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of an equipment inspection support device for an air conditioner according to the present embodiment.

FIG. 2 is a flowchart showing a processing flow in a terminal device and a diagnosis unit.

FIG. 3 is an image explanatory diagram showing a display screen of a terminal device that constitutes an equipment inspection support device for an air conditioner and a PC in a diagnosis unit.

FIG. 4 is an explanatory diagram showing vibration waveform data and a method of calculating an equivalent peak value from the waveform data.

FIG. 5 is a graph in which an equivalent peak value in vibration data is plotted for each number of measurements.

FIG. 6 shows a display screen that displays the cause and the countermeasure of the defect.

[Explanation of symbols]

10 ………… Facility inspection support device for air conditioner, 12 ………… Terminal equipment, 14 ………… Diagnostic unit, 16 ………… Main body, 18 ……
... CCD camera, 20 ... vibration sensor, 24 ... microphone headphone, 26 ... first PHS, 28 ...
…… Second PHS, 30 ………… PC, 32 ………… PDX,
34 ... Number display, 36 ... Name display, 38 ...
…… Image display, 40 ………… Vibration waveform display, 42 ……
… Equivalent peak value display of vibration, 44 ……… Alarm display,
46 ... Number display, 48 ... Name display, 50 ...
…… Image display, 52 ………… Vibration waveform display, 54 ……
... Equivalent peak value display 54 for vibration

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yutaka Ueno             1-14-1 Uchikanda, Chiyoda-ku, Tokyo             Stand Plant Construction Co., Ltd. F-term (reference) 3L060 AA02 AA04 CC17 CC19 DD06                       EE21

Claims (5)

[Claims] 1. A terminal device having an information input unit for fetching information from an air conditioning facility to be inspected, and a first communication unit for transmitting the information fetched by the information input unit, and the first communication unit. A diagnostic unit having a second communication unit for receiving the issued information, and a control unit for performing a calculation process of the information received by the second communication unit and storing the calculation result as a database; An equipment inspection support device for air conditioners, which is characterized by consisting of 2. The information input unit includes at least an image pickup unit and a vibration sensor, and the control unit loads an image from the image pickup unit and an equivalent peak value from the vibration sensor into the database, and The equipment inspection support device for an air conditioner according to claim 1, wherein a call means is connected to the first communication unit and the second communication unit. 3. The sampling period of the vibration sensor is
3. The equipment inspection support device for an air conditioner according to claim 2, wherein the vibration sensor is set to a range of 1 KHz to 10 KHz and a sampling time of the vibration sensor is set to a range of 1 second to 5 seconds. 4. The alarm means is connected to the first communication section, and when the control result of the information received by the second communication section is out of a preset range of the database, The facility inspection support device for an air conditioner according to claim 1 or 2, wherein an alarm means is activated. 5. A screen display unit is connected to the first communication unit,
The control means selects a defect similar to the calculation result of the information received by the second communication unit from the database,
The equipment inspection support device for an air conditioner according to claim 1 or 2, wherein the item of the problem is displayed on the screen display unit.