JP3937763B2 - Equipment inspection support device for air conditioners - Google Patents

Description

【００３１】
測定箇所は、通常３軸方向（Ｘ軸、Ｙ軸、Ｚ軸）に沿って行われるため、１箇所あたりのデータ数は１８０００個となる。
なお空調機における点検では、振動測定の他に映像、温度、外観検査結果のデータを送信する必要があるので、１箇所につき数分の測定時間が必要となる。そして空調機においては、計測ポイントは通常３〜５ポイント存在するので、１台の空調機あたり１０数分の測定時間が必要となる。そしてこの測定時間の長さは、従来の点検時間とほぼ同等であるので、点検効率が低下するのを防止することができる。
【００３２】
さらに従来の測定方法では、測定器の周波数範囲が１０〜１０００Ｈzであったため、サンプリングの定理より、サンプリング周波数は２kＨzに設定し、従来に比べ同等以上となっている。
なお本実施の形態に係る空調機用の設備点検支援装置１０では、振動の波形データそのものを記録することで、空調機の不具合が発生した場合、不具合の程度と波形データを突き合わせて検討することができ、将来的な空調機の予防診断の基礎データを構築することが可能になる。
【００３３】
例えば、変位あるいは変位を時間で微分して得られる速度や、さらに二次微分にて得られる加速度の周波数分析を行うことで空調機における種々の不具合を推定することができる。
すなわち比較的低い周波数（数１００kＨz以下）で見られる回転系のアンバランスや、ミスアライメントなどは回転軸の変位の周波数分析で解析することができ、またそれより高い周波数で確認される回転支持系の弛みや、空調機を設置した基礎の脆弱、あるいはモータの電気的異常などは回転軸の速度の周波数分析で解析することができる。さらに高い周波数（数ｋＨｚ）でみられるころがり軸受けの損傷、歯車の摩耗や欠け、回転部分と固定部分との接触等は加速度の周波数分析から推定することができる。
【００３４】
図５は、測定回数毎に振動データにおける等価ピーク値をプロットしたグラフである。同図に示すように、管理値の３０ミクロンは空調機の状態が好ましくないと判断される値である。ＰＣ３０では、この等価ピーク値の値が管理値を越えると、本体１６側における警報表示部４４に表示が出て、検査員に注意を促すようにしている。
【００３５】
さらに本実施の形態に係る空調機用の設備点検支援装置１０では、前記管理値に達する前段階でも過去の測定値との増加の割合を算出し、あらかじめ設定した割合を超過する場合も警報表示部４４に表示を出させるようにしておく。
図６は、不具合の原因および対策を表示する表示画面を示す。
【００３６】
同図に示すように、警報表示部４４に表示を出させれば、検査員は、検査現場にてその異常に気付き、再測定をしてデータの信頼性を確認することが可能になる。
またＰＣ３０においては、採取したデータに不具合が生じた場合、もしくはその可能性が有りそうな場合、想定される不具合の原因をリストアップして表示することができる。このように想定される不具合の原因を表示すれば、この画面を見ることで、さらに機器のどの部位を詳細に検討すべきかを判断することができ、ヘッドフォン２４を用いることで検査現場と診断部１４部との間で密に連絡をとり、調査の徹底と対策を早急に行うことができる。
【００３７】
【発明の効果】
以上説明したように本発明によれば、点検対象となる空調設備より情報を取り込む情報入力部と、この情報入力部に取り込んだ前記情報の送信をなす第1通信部とを有する端末機器と、前記第１通信部より発せられた前記情報の受信をなす第２通信部を有するとともに、この第２通信部にて受信した前記情報の演算処理を行い、この演算結果をデータベースとして保管する制御手段を有した診断部とから構成したので、点検作業に熟練を必要とせず、短時間に帳票作成が行え、さらに振動波形そのものも記録することが可能になる。
【図面の簡単な説明】
【図１】本実施の形態に係る空調機用の設備点検支援装置の構成を示す概要図である。
【図２】端末機器と診断部における処理の流れを示したフローチャートである。
【図３】空調機用の設備点検支援装置を構成する端末機器、および診断部におけるＰＣの表示画面を示した画像説明図である。
【図４】振動の波形データと、この波形データから等価ピーク値を演算する方法を示す説明図である。
【図５】測定回数毎に振動データにおける等価ピーク値をプロットしたグラフである。
【図６】不具合の原因および対策を表示する表示画面を示す。
【符号の説明】
１０………空調機用の設備点検支援装置、１２………端末機器、１４………診断部、
１６………本体、１８………ＣＣＤカメラ、２０………振動センサ、
２４………マイク付きヘッドフォン、２６………第１ＰＨＳ、
２８………第２ＰＨＳ、３０………ＰＣ、３２………ＰＤＸ、
３４………番号表示部、３６………名称表示部、３８………映像表示部、
４０………振動波形表示部、４２………振動の等価ピーク値表示部、
４４………警報表示部、４６………番号表示部、４８………名称表示部、
５０………映像表示部、５２………振動波形表示部、
５４………振動の等価ピーク値表示部５４[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an equipment inspection support apparatus for an air conditioner, and more particularly to an apparatus for supporting an inspection operation of an air conditioning equipment in a nuclear power plant or the like.
[0002]
[Prior art]
Air conditioners at nuclear power plants are regularly inspected and stored in order to improve reliability, detect failures early, and quickly recover.
[0003]
Conventionally, in the inspection of the air conditioning equipment, a measurement person carries a recording sheet and first enters the name of the air conditioning equipment and the date of inspection. Then, the measurer measures the vibration in the air conditioner with a vibration sensor, and obtains an equivalent peak value (: effective value × √2) of the displacement waveform. In addition, the measurer measures the temperature of the air conditioning equipment, investigates whether there are any oil leaks, odors, or noises, fills it in a record sheet, and then sends the data to a computer installed in the office. To compare with past data and output forms.
[0004]
[Problems to be solved by the invention]
However, in the conventional inspection method described above, since it is necessary to accurately represent and record the operating state of the device, there is a limitation that a skilled person must be in charge of the measurer.
Such restrictions are contrary to the recent shortage of skilled workers and the reduction in work costs associated with inspections, and an inspection support device that allows anyone to easily perform inspection work and create forms in a short time is desired. It was rare.
[0005]
Furthermore, in the conventional method described above, the vibration data of the air-conditioning equipment was expressed as a single numerical value as an equivalent peak value obtained by measuring the displacement for several seconds. However, if the vibration waveform itself is to be examined in detail, these waveform data Was not recorded as a database, and there was a risk of lack of data for consideration.
[0006]
The present invention pays attention to the above-mentioned conventional problems, and provides an equipment inspection support device for an air conditioner that does not require skill in inspection work, can create a form in a short time, and can also record the vibration waveform itself. The purpose is to do.
[0007]
[Means for Solving the Problems]
The present invention provides an equipment inspection support device for an air conditioner that includes a terminal device capable of collecting data and a diagnostic unit that takes in data collected by the terminal device and performs arithmetic processing on the data. This is based on the knowledge that a user is not required, can be easily inspected, and can capture even more detailed waveform data.
[0008]
That is, the equipment inspection support apparatus for an air conditioner according to the present invention includes a screen display unit that displays a list of air conditioners to be inspected , vibration waveforms of the air conditioner to be inspected , measurement data of the temperature of the air conditioner, and A portable terminal device having an information input unit that captures information on the appearance inspection result of the air conditioner, and a first communication unit that transmits the information captured in the information input unit, and the first communication unit A second communication unit that receives the received information, and transmits a list of the air-conditioning equipment to be inspected to the screen display unit via the second communication unit, which is received by the second communication unit The information processing unit is configured to include a diagnosis unit having a control unit that performs calculation processing of the information and stores the calculation result as a database.
[0009]
The information input unit includes at least an imaging unit and a vibration sensor, and the control unit captures an image from the imaging unit and an equivalent peak value from the vibration sensor into the database, and the first communication unit It is desirable to connect a communication means to the second communication unit, and further, the sampling period of the vibration sensor is set in the range of 1 KHz to 10 KHz, and the sampling time of the vibration sensor is set in the range of 1 second to 5 seconds. It is preferable to set.
[0010]
The alarm means is connected to the first communication section, and the control means activates the alarm means when the calculation result of the information received by the second communication section is out of a preset range of the database. Or let
Alternatively, a screen display unit is connected to the first communication unit, and the control unit selects a defect similar to the calculation result of the information received by the second communication unit from the database, and sets the item of the defect to the screen You may make it display on a display part.
[0011]
Moreover, the equipment inspection support device for an air conditioner according to the present invention can also be expressed as follows.
That is, the equipment inspection support apparatus for an air conditioner according to the present invention includes a portable terminal device for recording vibration and temperature measurement data and appearance inspection results in an air conditioner such as a blower, an exhaust fan, or a refrigerator. Have. In addition to the terminal device, the apparatus includes a diagnosis unit that is located away from the air conditioning equipment and stores measurement data and inspection results as a database.
[0012]
And it comprised so that data transmission / reception might be performed by the data communication using PHS between the terminal device of the equipment inspection assistance apparatus with such a structure, and a diagnostic part.
In addition, the terminal device and the diagnostic unit display 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 conversations. 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.
[0013]
When measured vibration data and temperature data exceed a predetermined rate of increase or control value compared to past data, it is desirable to display an alarm on the terminal device, and examples of visual inspection results on the terminal device screen It is preferable to list the causes of the malfunctions assumed along with the tendency of the vibration and temperature measurement values and to display them on the screen by selecting the relevant item from among them.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of an equipment inspection support device for an air conditioner according to the present invention will be described below in detail with reference to the 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.
[0015]
As shown in the figure, the equipment inspection support device 10 for an air conditioner according to the present embodiment includes a terminal device 12 carried by a measurer and a diagnosis for receiving information from the terminal device 12 for diagnosis. Part 14.
Connected to the main body 16 of the terminal device 12 are a CCD camera 18 (hereinafter referred to as a CCD 18) serving as an imaging means and a vibration sensor 20 that is attached to the measurement object and detects the vibration of the measurement object. The image captured by the CCD 18 and the waveform data from the vibration sensor 20 can be taken into the main body 16.
[0016]
Further, the main body 16 has a screen display unit for displaying video and waveform data captured by the CCD 18 and the vibration sensor 20, and a pen input function so that data can be input directly from the measurer. Appearance inspection results such as equipment temperature, oil leakage, strange odor, and noise can be input to the main body 16.
[0017]
Further, the main body 16 is attached with a headphone 24 with a microphone (hereinafter referred to as the headphone 24), and can make a call with a diagnosis unit 14 (to be described later) via a call circuit serving as a call means (not shown) in the main body 16. I have to.
As described above, the main body 16 is connected to or provided with the CCD 18, the vibration sensor 20, the screen display unit, and the headphones 24, and the components of the main body 16 are a first communication unit for transmitting and receiving data. Connected to the first PHS 26.
[0018]
On the other hand, the diagnosis unit 14 constituting the equipment inspection support device 10 for an air conditioner has a second PHS 28 for transmitting and receiving to and from the first PHS 26, and the second PHS 28 includes a computer 30 (control means). Hereinafter, the PC 30 is referred to. When the PC 30 receives the video and waveform data from the terminal device 12 via the second PHS 28, temperature data input from the measurer, or appearance inspection results such as equipment temperature, oil leaks, odors, and noise. These measurement results are recorded in a database in the PC 30, and the equivalent peak value can be calculated by a preset calculation process.
[0019]
By the way, on the premises where the terminal equipment 12 is used, a PDX (private branch exchange) 32 and an antenna 33 are provided, and the transmission output of the terminal equipment 12 is reduced to about milliwatts by arranging the antenna 33 in various places in the building. In addition, it is possible to communicate while avoiding obstacles such as equipment and walls.
[0020]
A procedure for inspecting air conditioning equipment installed in a nuclear power plant using the equipment inspection support device 10 for an air conditioner configured as described above will be described.
FIG. 2 is a flowchart showing a flow of processing in the terminal device and the diagnosis unit.
As shown in the figure, when checking the air-conditioning equipment installed in the nuclear power plant, the terminal device 12 and the diagnostic unit 14 are first turned on, and these devices are activated (step 100, step 110). ).
[0021]
And the number of the air conditioner to be inspected is selected from the database inside the PC 30 by the diagnosis unit 14 located away from the air conditioner. If the air conditioner number is not registered in the database, the PC 30 may be operated and newly registered on the database (step 120). After the diagnosis unit 14 sets the number of the air conditioner to be inspected, it enters a state of waiting for line connection from the terminal device 12 (step 130).
[0022]
Here, after the diagnosis unit 14 enters the line connection waiting state, the inspector operates the terminal device 12 to perform the line connection operation and connect to the diagnosis unit 14 (step 140). It is authenticated whether it is the terminal device 12 constituting the equipment inspection support apparatus 10 for use (step 150). After the authentication of the terminal device 12, the diagnosis unit 14 transfers the number of the air conditioner to be inspected to the terminal device 12 that has been connected to the line (step 160).
[0023]
After the terminal device 12 receives the air conditioner number list transmitted from the diagnostic unit 14, the number list is displayed on the screen display unit of the main body 16, so that the inspector can display the number displayed on the screen display unit. An air conditioner to be diagnosed is selected from the list (step 170). After selecting the air conditioner to be diagnosed, the inspector confirms by using the headphones 24 and the CCD 18 to communicate with the person in charge on the diagnosis unit 14 side or transfer the image to the diagnosis unit 14 side. Or communication of notes (step 180).
[0024]
After confirming between the terminal device 12 side and the diagnosis unit 14 side, the vibration sensor 20 is attached to the air conditioner, and vibration data generated in the air conditioner is taken into the main body 16, Temperature data and appearance inspection results are input to the main body 16 by pen input (step 190). When the inspection of the air conditioner is completed, the inspector operates the main body and transfers the measurement data from the first PHS 26 to the diagnosis unit 14 side via the PDX 32 (step 200).
[0025]
In the diagnosis unit 14 to which the measurement data is sent from the terminal device 12, the measurement data is transmitted to the PC 30, and then the PC 30 displays the transmitted measurement data (step 210) and the past in the database. Compare with the value and automatically verify whether the data measured this time have a large fluctuation. If the measured data exceeds the management value, a signal is issued from the PC 30 to the alarm means provided in the main body 16 (step 220, step 230).
The terminal device 12 returns to the main screen when the measurement is completed for the air conditioner set at the beginning of the inspection, terminates communication with the diagnosis unit 14 side, and disconnects the line (step 240, step 250, step 260).
[0026]
On the other hand, when all the measurement data is transferred from the terminal device 12 on the diagnosis unit 14 side, the measurement data is added to the database in the PC 30 and the database is stored, and the past data is combined with the past data. A form is output (step 270). Thus, after outputting the report of an arbitrary air conditioner, the diagnosis unit 14 returns to the main screen and thereafter ends (steps 280 and 290).
[0027]
FIG. 3 is an image explanatory view showing a display screen of a PC in a terminal device and a diagnosis unit constituting an equipment inspection support device for an air conditioner.
As shown in FIG. 1A, the main body 16 of the terminal device 12 includes an air conditioner number display unit 34, an air conditioner name display unit 36, an air conditioner image display unit 38, and a vibration waveform display unit 40. The vibration equivalent peak value display section 42, the alarm display section 44, and the measurement location position selection buttons 46A to 46C are provided. For example, each measurement item is displayed in the state of step 190 in FIG. By checking this display, the worker can confirm whether the inspection has been performed reliably.
[0028]
On the other hand, on the screen of the PC 30 constituting the diagnosis unit 14, an air conditioner number display unit 46, an air conditioner name display unit 48, an air conditioner image display unit 50, a vibration waveform display unit 52, and an equivalent peak of vibration are displayed. A value display unit 54 is displayed. And the operator who operates PC30 can grasp | ascertain the state of the air conditioner in the place away from this screen of PC30.
[0029]
By the way, in this embodiment, it is possible to capture waveform data of vibrations generated in the air conditioner.
FIG. 4 is an explanatory diagram showing vibration waveform data and a method of calculating an equivalent peak value from the waveform data.
[0030]
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 per location. The equivalent peak value is calculated from the following formula.
[Formula 1]

[0031]
Since the measurement locations are usually along the three-axis directions (X-axis, Y-axis, Z-axis), the number of data per location is 18000.
In the inspection of the air conditioner, it is necessary to transmit video, temperature, and appearance inspection result data in addition to vibration measurement. And in an air conditioner, since there are usually 3 to 5 measurement points, 10 minutes of measurement time is required for each air conditioner. And since the length of this measurement time is substantially equivalent to the conventional inspection time, it can prevent that inspection efficiency falls.
[0032]
Furthermore, in the conventional measuring method, since the frequency range of the measuring instrument is 10 to 1000 Hz, from the sampling theorem, the sampling frequency is set to 2 kHz, which is equal to or higher than the conventional method.
In addition, in the air conditioner equipment inspection support apparatus 10 according to the present embodiment, by recording the vibration waveform data itself, when a malfunction of the air conditioner occurs, the degree of the malfunction and the waveform data should be compared. It is possible to construct basic data for preventive diagnosis of air conditioners in the future.
[0033]
For example, various problems in the air conditioner can be estimated by performing frequency analysis of the displacement or the speed obtained by differentiating the displacement with respect to time and the acceleration obtained by the second order differentiation.
That is, unbalance and misalignment of the rotating system 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 can be confirmed at a higher frequency. The looseness of the foundation, the weakness of the foundation where the air conditioner is installed, or the electric abnormality of the motor can be analyzed by frequency analysis of the speed of the rotating shaft. Further, damage to rolling bearings, wear or chipping of gears, contact between a rotating part and a fixed part, and the like seen at a higher frequency (several kHz) can be estimated from frequency analysis of acceleration.
[0034]
FIG. 5 is a graph in which equivalent peak values in vibration data are plotted for each number of measurements. As shown in the figure, the management value of 30 microns is a value determined that the condition of the air conditioner is not preferable. In the PC 30, when the value of the equivalent peak value exceeds the management value, a display is displayed on the alarm display unit 44 on the main body 16 side to alert the inspector.
[0035]
Furthermore, in the equipment inspection support apparatus 10 for an air conditioner according to the present embodiment, the rate of increase with the past measured value is calculated even before reaching the control value, and an alarm is displayed even when the preset rate is exceeded. The display is displayed on the unit 44.
FIG. 6 shows a display screen that displays the cause and countermeasure of the failure.
[0036]
As shown in the figure, if the display is made on the alarm display unit 44, the inspector becomes aware of the abnormality at the inspection site and can perform re-measurement to confirm the reliability of the data.
Further, in the PC 30, when a failure occurs in the collected data or when there is a possibility that the failure is likely to occur, the possible causes of the failure can be listed and displayed. If the cause of the failure thus assumed is displayed, it is possible to determine which part of the device should be examined in detail by looking at this screen. We can communicate closely with the 14th department, and we can immediately conduct thorough investigations and countermeasures.
[0037]
【The invention's effect】
As described above, according to the present invention, a terminal device having an information input unit that captures information from an air conditioning facility to be inspected, and a first communication unit that transmits the information captured in the information input unit, Control means having a second communication unit for receiving the information transmitted from the first communication unit, performing calculation processing of the information received by the second communication unit, and storing the calculation result as a database Therefore, it is possible to create a form in a short time and record the vibration waveform itself.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of an equipment inspection support device for an air conditioner according to an embodiment.
FIG. 2 is a flowchart showing a flow of processing in a terminal device and a diagnosis unit.
FIG. 3 is an image explanatory view showing a display screen of a PC in a terminal device and a diagnosis unit constituting an equipment inspection support device for an air conditioner.
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 plotting equivalent peak values in vibration data for each number of measurements.
FIG. 6 shows a display screen that displays the cause and countermeasures of the defect.
[Explanation of symbols]
10 ......... Equipment inspection support equipment for air conditioners, 12 ... Terminal equipment, 14 ... Diagnosis Department,
16 ……… Main body, 18 ……… CCD camera, 20 ……… Vibration sensor,
24 ……… Headphone with microphone, 26 ……… First PHS,
28 ......... Second PHS, 30 ... PC, 32 ... PDX,
34 ... Number display section 36 ... Name display section 38 ... Video display section
40... Vibration waveform display section 42... Equivalent peak value display section of vibration
44 ......... Alarm display section, 46 ......... Number display section, 48 ......... Name display section,
50 ......... Video display section, 52 ......... Vibration waveform display section,
54... Equivalent peak value display 54 of vibration

Claims (5)

A screen display section for displaying a list of air conditioners to be inspected, an information input section for capturing information on vibration waveforms of the air conditioning equipment to be inspected , measurement data of the temperature of the air conditioning equipment , and appearance inspection result of the air conditioning equipment A portable terminal device having a first communication unit that transmits the information captured by the information input unit, and a second communication unit that receives the information emitted from the first communication unit. The list of the air conditioners to be inspected is transmitted to the screen display unit via the second communication unit , the calculation process of the information received by the second communication unit is performed, and the calculation result is stored as a database. An equipment inspection support device for an air conditioner, characterized in that it comprises a diagnostic unit having a control means for controlling.   The information input unit includes at least an imaging unit and a vibration sensor, and the control unit captures an image from the imaging unit and an equivalent peak value from the vibration sensor into the database, and the first communication unit. The equipment inspection support device for an air conditioner according to claim 1, wherein a communication means is connected to the second communication unit.   The sampling period of the vibration sensor is set in a range of 1 KHz to 10 KHz, and a sampling time of the vibration sensor is set in a range of 1 second to 5 seconds. Equipment inspection support device.   An alarm unit is connected to the first communication unit, and the control unit activates the alarm unit when a calculation result of the information received by the second communication unit is out of a preset range of the database. The equipment inspection support device for an air conditioner according to claim 1 or 2, characterized by the above. 2. The control unit according to claim 1, wherein a defect similar to the calculation result of the information received by the second communication unit is selected from the database, and the item of the defect is displayed on the screen display unit. Item 2. A facility inspection support device for an air conditioner according to Item 2.

Images