JPS58150829A - Abnormality diagnosis apparatus for sound - Google Patents

Abstract

PURPOSE:To enable remote diagnosis of abnormality of equipment with a simple structure by collecting a normal sound of a sound source for diagnosis in a rotary machine or the like to be memorized into a data recorder as necessary comparison signal for the diagnosis. CONSTITUTION:When an operator 100 operates a console 13 before the start of a diagnosis, a normal acoustic signal from a sound source 50 as collected with a microphone 1 is recorded into a data recorder 3 as diagnostic comparison signal based on a control signal 8 of a controller 12. Then, when the sound source 50 is diagnosed, an acoustic signal form the sound source 50 is applied to a speaker 5 through a gate 6 and at the same time, a reproduced signal from the record 3 is applied to a speaker 4. Therefore, the operator can catch the two acoustic signals as audio information simultaneosuly thereby enabling the extraction of abnormal sounds of the sound source at a remote point.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acoustic abnormality diagnosis device that remotely extracts abnormal sounds emitted by rotating machines, etc., and is particularly applicable to nuclear reactor power plants, chemical plants, general production plants, etc.
The present invention relates to an acoustic abnormality diagnosis device suitable for remotely diagnosing the presence or absence of an abnormality in a rotating machine or the like.

The method of diagnosing equipment abnormalities using acoustics will be explained in two parts: by machine and by humans.

Conventionally, when detecting abnormalities using machines, filters, amplifiers, frequency analyzers, etc. are used to collect information that characterizes the sound (frequency, amplitude, etc.).

Extracting the phase), examining the combination of the above information elements and their temporal changes, and presetting the nine-fight value and the O ratio I2 (from the
For example, there is a frequency spectrum analyzer for diagnosing abnormalities in equipment as a device for this purpose.

However, such devices have complicated circuits and
It has the disadvantage of becoming.

In the case of 6, even today, inspectors often listen to the sounds of the equipment they are diagnosing to see if there is an abnormality.
When a person memorizes information about the sound pattern used as a comparison signal in advance and listens to the sound as a compared signal from the object to be diagnosed (for example, a rotating machine or a transformer), This is compared with the above ratio signal to detect an abnormality in the equipment.

However, humans do not sleep with a clear memory of many negative events (for example, the sound that echoes with the comparison signal mentioned above), or are directly exposed to conditions such as high radiation, high temperature, and dust. Diagnosing equipment, etc. is extremely important.

Therefore, the purpose of this FIAo is to eliminate the drawbacks of the above-mentioned prior art, and to provide the sound as a comparison signal necessary for diagnosing equipment abnormality simultaneously or alternately with the sound as the compared signal as human auditory information. The purpose of the present invention is to provide a simple and inexpensive device for remotely diagnosing a machine.

In order to achieve the above purpose, the normal sound of the sound source to be diagnosed is detected by acoustic detection 1ii (for example, icrophone,
The sound is collected using a vibration sensor, etc., and recorded in advance on a data recorder as a comparison signal necessary for diagnosis.

When the operator performs the previous diagnosis based on instructions from the console, the sound detector collects the threatening sound from the sound source during one diagnosis, and uses this as the signal to be compared.

The data recorder is configured to transmit the comparison signal and the compared signal to two systems of speakers at the same time when the data recorder reproduces the data recorder and when the data recorder plays the data recorder. It consists of a series of analog gates and other controllers.

Alternatively, as a method for transmitting the comparative signal and the compared signal, they can be alternately transmitted to the speakers of one system by intermittent playback of the data recorder and intermittent 1kjlIIf tie-throwing of the analog gate. To,
It consists of a data recorder, analog gates, and controllers.

Therefore, with the above configuration, it is possible to simultaneously or alternately provide the acoustic information as the acoustic comparison signal and the acoustic information as the comparison signal necessary for extracting the abnormal sound of the sound source. What's more, the extraction of abnormal sounds by humans can be reliably performed in a practical manner. Hereinafter, the present invention will be explained in detail by way of examples.

FIG. 581 is a block diagram of an embodiment of the acoustic abnormality diagnosis method and its installation according to the present invention. 1F1 microphone, 2 signal intensifier, 3 data recorder, 4.5 speaker, 6 analog gate, 1
2 is a controller, and 13 is a console.

In order to make this device work properly, if any sound can be input to the microphone 5, the two signal systems ml-2
-3-4 and signal system 1-2-6-5, the operator
0 coordinates the gain, bandwidth, 8N ratio, etc. of the two output signal lines l-1-a-4 and signal lines l-2-1i1-5.

During the diagnosis, the operator 100 uses the console 1.
Operate the controller 12 according to the instructions from 3 to check the normal sound of the sound source 50 that is the target of diagnosis in advance! Sound is collected by a microphone l, passed through a signal amplifier 2, and recorded in a data recorder 3 as a comparison signal necessary for diagnosis. Control ill at this time! The data recorder 3 is opened at the bell time 100 indicated by the recording control signal 7 in Figure aI2. The bell time lO is enough time to diagnose the sound. Currently, inspectors inspect one inspection object in approximately several minutes, so in ζζ, the bell sound time io is used as an example. 3 minutes to 9.

At a time when the operator 100 performs a sound-electric SOO diagnosis at an arbitrary diagnosis time, for example at time 14 in Figure 2, the operator 100 instructs the operator 100 to listen to the sound emitted by the sound source sO during the diagnosis. The sound to be compared is collected by the mitalophone l and sent to the k1 extension SSZ. Also,
At this time, the controller 1i) 1m sends a reproduction control signal to the data recorder 3 and an open dart control signal 9 to the gate 6. IIm-K, data record showing the timing of the above-mentioned reproduction control signal S and gate control signal 9, /3
The comparison signal is reproduced and sent to the speaker 4 in response to the signal 8. Gate 6 #i, No. 1 Masanobu W
The compared signal from k2 is passed through 1 and sent to Subi-force 5.

The speaker 4 transmits sound corresponding to the comparison signal to the speaker 5.
are the acoustic sounds corresponding to the compared signals, respectively.
．． A diagnostic time 347e equal to 90*M hours is sent.

In the stripe diagram 2, 10i-IQI was set between diagnosis #III#, and 1sI11G was set equal to 1sI11G at the time of upper 1ellkf. after that,#
At the end of FIG. 12, the device 12 simultaneously stops transmitting the comparison signal and the signal to be compared, and ends the diagnosis in automatic mode.

Diagnosis [If repeated, operator 10G
When the controller 12 is instructed to start #ll11M from 2, the above and -11 are played back? The tIlim value number 8, the gate control signal 9, and the sounds corresponding to the comparison signal and the compared signal are output from Jli 29 to Jli 30 at t1 and are transmitted at the same time at the leap of the diagnosis time 34, so that the diagnosis is delayed again.

According to this example, the operator loO is slowed down by having to listen to two sounds corresponding to the comparison signal and the compared signal necessary for diagnosing the sound source 50 at the same time. Easily detect abnormal noises indicating leading edge abnormalities remotely without having to memorize them.

can be extracted.

Therefore, by using such an acoustic abnormality diagnosis method and its device t-1, it is highly effective to ensure acoustic abnormality diagnosis by a person remotely.

FIG. 3 shows the acoustic abnormality diagnosis method according to the present invention and its W&
FIG. 2 is a block configuration diagram of another embodiment of the device.

In FIG. 3, 1 is a microphone, 7 is a signal amplifier, 3 is a data recorder, 4 is a speaker, 6 is an analog gate, 13 is a console, and 3s is a controller.

In order to make this device work properly, when inputting any acoustic sound to the mitalophone IK, signal system 1 shown as gsaii is required.
11-2-3-4 and the signal system 1-2-.-4, the operator 100 has to switch the signal system 1 to the signal system 1 so that the sound output from the speaker 4, which is one output system, does not differ.
-2-3-4> and Remarks Adjust the bandwidth, SN ratio, etc. of system 1-2-6-4.

At the beginning of the diagnosis rja, the operator 100tf activates the controller xsvr according to instructions from the console Is, and collects normal sound s50, which is the target of diagnosis, with the microphone 1, and passes it to the signal amplifier 2. Check this INK41
P is recorded in the data recorder 3 as a necessary comparison signal.

At this time, the control signal 7 given to the data recorder 3 from the controller 25 is indicated by 4SK.The data recorder 3 performs recording for the time 100 during which this signal 7 is applied.The recording time 1G is the sound Ilt diagnosis. All you need is time to do so.

Since the current situation is that an inspector inspects one inspection object in approximately several minutes, the recording time is set to 3 minutes here as an example from 10.

Operator lOO selects an arbitrary diagnosis start time 24 (J141
When starting the tsso diagnosis in M, the operator 10G instructs the microphone 1 to collect the sound emitted by the sound AGE during diagnosis as the ninth comparison signal for the diagnosis, and increase this signal. Send it to the speaker 2. At this time, the controller 25 sends an intermittent playback control signal 2G to the coater recorder 3 and an intermittent gate control signal 2G to the gate 19.
2 each alternately. FIG. 4 shows a tie between the reproduction control signal 21 and the gate control signal 22. In response to the reproduction control signal 21, the data recorder 3 intermittently reproduces the comparison signal and sends it to the speaker 4. do.

In response to the gate signal 22, the gate intermittently passes the 0 compared signal from the signal amplifier 3 and sends it to the speaker 4.

The speaker 4 alternately sends out the sound corresponding to the ratio IIR polarization and the sound corresponding to the compared signal.The 0w control-2s sends out the entire s' while dividing the north wall sound recorded in kVh in advance. After boiling, the diagnosis is finished at the diagnosis end time 31 by intermittently transmitting the mothgoo O 翿Hi稙子 signal. - When repeating the diagnosis, the operator 100 uses the console 13
If the user instructs the start of the diagnosis, the KO diagnosis will be performed again, for example, at an interval between the diagnosis start time 33 and the diagnosis end time 33.

The time period for intermittently transmitting the sound is 34 (in the irises 411, people with good hearing can listen to the sound 0IIA for several seconds on their own.Also, even people who are not accustomed to the intermittent sound of a certain specified sound can hear it for 10 to 34 seconds. If you play it through II4, you will be able to hear the difference in sound.

Here, the above-mentioned time 34 is set to 30 seconds as an example.

According to the above-mentioned 3D embodiment, the operator 100 can generate a comparison signal that can alternately use sounds corresponding to the comparison signal necessary for cutting off the sound source and the comparison signal as auditory information. By intermittently making 6 sounds,
Compared to the previous version of the lt signal, abnormal sounds indicating an abnormality in the sound source can be easily extracted remotely.

Therefore, according to the present invention, by using such a simple method for diagnosing an acoustic abnormality and its apparatus 1, acoustic abnormality diagnosis by a person can be performed remotely and reliably.

[Brief explanation of the drawing]

1I111 is a block diagram of one embodiment of the present invention, and FIG. 2 is #
FIG. 3 is a configuration diagram of the 112th embodiment of the present invention, and FIG. 4 is an explanatory diagram of the time relationship of control signals used in FIG. I1. G...Microphone, 2...Signal amplifier, 3...
Data recorder, 4.5--Speaker, 6--Analog goo), 12.25--Controller, 13--Console. 11th! ] Continued from page 34, 1 ■Applicant Tokyo Electric Power Co., Ltd. 1-1-3 Uchisaiwai-cho, Chiyoda-ku, Tokyo @Applicant Chubu Electric Power Co., Inc. Higashishinmachi Ichiban, Higashi-ku, Nagoya ■Applicant Chugoku Electric Power Co., Ltd. Company: 4-33 Komachi, Naka-ku, Hiroshima City, Japan Applicant: Hitachi, Ltd. 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo

Claims (1)

[Scope of Claims] L. A first means for collecting sound from a sound source to be diagnosed and converting it into an electrical signal, and a second means for storing the output from the first means in advance before diagnosis; 3. Electro-acoustic conversion. a fourth means, and one said first means at the time of diagnosis. The outputs of the second means are respectively outputted from the fourth means. An acoustic abnormality diagnosing device comprising means for controlling the supply to the third means. 2 iron chain 3. The fourth means is a common means, and the control means controls the first means at the time of diagnosis. 2. The acoustic abnormality diagnosing device according to claim 1, further comprising means for controlling the output of the second means so as to alternately supply the output to the common means for scissors.