JPH0758519B2 - Remote diagnosis method for equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention includes rotary equipment such as pumps and fans. The present invention relates to a remote diagnosis method for predictive maintenance of appropriate equipment used in buildings.

(Prior Art) For example, equipment such as a pump and a fan has a unique operating frequency, and the level thereof changes depending on its capability and state.

Then, using this unique operating frequency and the level,
It is common to perform equipment diagnosis of these equipment, but in such a case, conventionally, such diagnosis was mainly performed using a vibration sensor.

(Problems to be solved by the invention) However, it is a current situation that it is desired to develop a remote automatic diagnosis method and an efficient management system for each equipment using the method, and in dealing with it, However, the conventional diagnostic methods have various problems.

That is, first, according to the method using the vibration sensor, the vibration sensor must be directly attached to each equipment to be measured to be diagnosed. In addition, since the existing vibration sensor relies on the charge output for its output, the effective transmission distance is 2-3 m. To operate and diagnose this remotely, a separate amplifier is installed close to the vibration sensor. This was not preferable because of the enlargement of the measuring device and the accompanying restrictions on the mounting location. Moreover, since there is no means to guarantee the steady operation state of the equipment to be measured, the vibration sensor is always attached to the equipment to be measured and all the measured data is recorded remotely, or each equipment to be measured is patrolled,
The only way to record the measurement data is to directly check the operating condition, which is wasteful and unbearable.

On the other hand, there has been proposed a method in which a unique sound generated during operation of equipment is used to directly measure with a microphone sensor and to make a diagnosis with data obtained as a result.
It is pointed out that it is difficult to distinguish it from background noise even by the diagnosis by such a method. Therefore, the application of a statistical method that performs time-axis synchronized averaging has been examined, but there was a problem in that it lacked accuracy.

In addition, when applying a diagnostic method that uses sound to a remote method, in addition to the problem of guaranteeing the operating state of the equipment under test and the problem of distinguishing it from background noise, sound can be measured and obtained. In transmitting the stored data remotely, it is necessary to pay attention to the fluctuation of the gain, especially during the data transmission. This is because accurate equipment diagnosis cannot be performed even if data analysis is performed while ignoring gain variations. Moreover, in the case of automatically measuring and analyzing remotely, it suddenly occurs for some reason. Another problem is how to deal with abnormal noise that is not related to the equipment under test.

Therefore, how to solve each of these problems, how to measure the optimum data for equipment diagnosis, and to accurately analyze this data remotely to perform highly reliable equipment diagnosis becomes a problem.

(Means for Solving Problems) The present invention has been made in view of the above points, and facility equipment used for a building is often located in a building or on a rooftop, and therefore other buildings or Focusing on the fact that the impact of noise from the road is relatively small, that there are few equipment and equipment that operate 24 hours a day, and that the background noise level at night is extremely low, including environmental noise, etc. Although it depends on the installation location of), the basic configuration is to operate the equipment under test at a pre-specified time and record the data required for diagnosis in synchronization with it.
For transmission, a configuration that takes into consideration the above problems is adopted.

First, regarding the first invention, in addition to the configuration for recording the data after confirming the operation state of the equipment to be equipment, a means for recording the data regarding the operation sound necessary for equipment diagnosis by a microphone sensor is provided. In addition to preventing various drawbacks seen in the vibration sensor, when transmitting this to a data analysis device, etc., by adding an appropriate reference signal and doing this, gain of remote transmission can be improved. It deals with fluctuations.

In terms of its specific structure, the start / stop of the measured equipment is stopped by the input of the measurement request signal issued at the time of the prespecified measurement and the operating state display signal of the measured equipment at this time. The microphone sensor measures the background noise at the time of stop and the operation noise at the time of steady operation in synchronization with the start / stop signal, and adds a predetermined reference level signal to the measured data to record the data. As the recorded data, the input signal level of the measured signal is determined from the gain of the measured signal measured by the variation of the gain between the input signal and the measured signal in the reference level signal included in the recorded data. The signal level of is adjusted and the data after the adjustment is analyzed to diagnose the equipment to be measured.

A second aspect of the invention adopts the configuration of the first aspect of the invention as it is as a main part thereof and further adds a new configuration for dealing with sudden abnormal sound to solve the above problem. It is a thing.

In terms of its specific structure, the start / stop of the measured equipment is stopped by the input of the measurement request signal issued at the time of prespecified measurement and the operation status display signal of the measured equipment at this time. In addition, the background noise is measured at the stop in synchronization with the start / stop signal, and the operation noise is measured by the microphone sensor at the time of steady operation, and a predetermined reference level signal is added to the measured data and recorded. Data is transmitted to a data analysis device, and the input signal level of the measurement signal is determined from the measured gain of the measurement signal by the fluctuation of the gain between the input signal and the measurement signal in the reference level signal included in the recording data, and the data is recorded. When adjusting the signal level of the data and analyzing the data using the adjusted data to diagnose the equipment under test, At this time, the abnormal data is detected by performing a comparison calculation with the preset basic data of the equipment, and the data re-recording signal based on this is used to order the equipment to be measured again to start and stop. It is characterized in that the background noise is measured at the time of stop in synchronization with the signal and the driving sound is measured at the time of steady operation by a macrophone sensor to diagnose the equipment to be measured.

(Operation) In the first aspect of the invention, first, at a time suitable for measuring the operation sound of the equipment such as at night, the measurement request signal is output from the appropriate transmitter to the appropriate measurement determination device. A signal indicating the operating state of the equipment to be measured at this time is output from, for example, a device that is in charge of controlling and operating the equipment to be measured, and is input to the measurement determination device. Then, the measurement is determined, and if the equipment to be measured is operating at that time, the stop signal is commanded to stop the equipment, and the background noise is measured. When it is already stopped, background noise is measured immediately. Then, after this, a reference signal is added to the measurement data of background noise, and the measurement data is transmitted to an appropriate data analysis device. At this time, when there are a plurality of equipment to be measured, it is possible to cope with them by introducing the respective operation state display signals to the measurement determination device, selecting the measurement order, timing, etc., performing measurement determination and sequentially performing the above operation. It is a thing.

Next, the operation signal of the equipment to be measured is started by the start / stop signal, and the operation sound at that time is measured when it becomes a steady operation. The reference signal is added to the data and the data is transmitted to the data analysis device. The confirmation of the steady operation can be realized also by using the input circuit of the operation state display signal. Then, before analyzing each recorded data, first, the variation of the gain between the input signal and the measurement signal in the reference signal is determined, and the input signal level is determined from the gain of the actually measured measurement signal based on the result, The signal level of the recorded data is adjusted based on the result, and various data analyzes necessary for equipment diagnosis are performed by the adjusted signal level.

Next, according to a second aspect of the invention, in the first aspect of the invention, when the microphone sensor measures an abnormal sound and transmits the abnormal sound to an analysis device, for example, prediction data based on the number of revolutions and measurement at the time of installation of facility equipment are measured. Data and trend processing data, etc. are recorded in memory in advance, and anomalous data is detected by comparing and calculating them, and based on that, a data re-recording signal is input to, for example, the measurement determination device, and the measurement timing is measured again. Etc., the operation sound of the equipment under test is measured again, the data is transmitted, and this is analyzed. Therefore, if the abnormal data described above is accidental or accidental from the outside, these are excluded during remeasurement and analysis, and only the data necessary for diagnosing the equipment under test is It is targeted.

The number of times the re-recording signal is input to the measurement / judgment device for realizing such an operation is set arbitrarily as necessary, but usually, it is repeated 2-3 times and re-recorded. ,
Furthermore, when detecting abnormal data, it can no longer be assumed to be a sudden abnormal sound from the outside, and it is considered that the equipment under test itself has an abnormality such as some trouble or failure.

(Example) Hereinafter, the Example of this invention is described. FIG. 1 is a basic block configuration diagram of an embodiment, and 1 is a device start / stop / measurement signal trigger device for judging and instructing the order and timing of measurement determination, selection of equipment to be measured, and its start / stop. ,
The device start / stop / measurement signal trigger device 1 has a small environmental noise, and requests measurement at a time suitable for measurement by a microphone sensor. The signal from the measurement timing determination request signal transmitter 2 and the equipment 3 The operation state instruction signal from the device operation state transmitter 4, which is interlocked with an appropriate control device (not shown) responsible for the operation and control of the above, is input.

In addition to this, the device start / stop / measurement signal trigger device 1 is also adapted to receive a data re-recording signal from the data collection / analysis device 5 that is output when abnormal data is detected. Then, the measurement determination is made again.

The device start / stop / measurement signal trigger device 1 is configured to output a measurement instruction and a signal for instructing the facility device 3 to start / stop the operation after performing the above measurement determination. Is input to the switch 6. The measurement room 7 in which the equipment 3 is installed is provided with a microphone sensor 8 capable of hearing the operation sound of the equipment 3. The operation sound measured by the microphone sensor 8 is a reference level transmitter. 9 is added to the reference signal and transmitted as recorded data to the switching device 6. Therefore, when the measurement instruction signal from the device start / stop / measurement signal trigger device 1 is input to the switching device 6, the circuit of the switching device 6 is closed and the recorded data is transmitted to the data collection / analysis device 5. It is.

Thus, in the data collection / analysis device 5, before analyzing and calculating the transmitted recorded data, the reference level judgment / signal level adjuster 10 judges the fluctuation of the gain accompanying the transmission, and is suitable data for equipment diagnosis. Are extracted, and various analyzes are performed based on such data. That is, the reference signal is transmitted from the reference level transmitter 9 and the input signal of the reference signal,
By the reference level measurement and the reference level measurement signal in the signal level adjuster 10, the change in gain associated with transmission is determined,
Based on the result, the input signal level is determined from the measured gain of the measured signal, and the signal level of the recorded data is adjusted. In the present embodiment, prediction data, initial data,
The trend data is recorded, the overall value based on the recorded data, comparison with each level of other frequency components, calculation, etc. are performed, and the equipment 3 is diagnosed based on the result.

At this time, if abnormal data is detected in the process of analysis,
Based on this, the data re-recording signal is output to the device start / stop / measurement signal trigger device 1. Then, after that, the measurement determination is performed again, and the operation sound of the equipment 3 is measured again.

As is clear from the figure, the equipment 3 is installed in the measured room 7.
Even if there are a plurality of noises, only one microphone sensor 8 is required to be installed to measure this driving sound, and there is no need to attach it to each equipment as in the conventional vibration sensor. Moreover, in this case, when the peculiar operating frequencies of the respective equipments 3 are different from each other, it is possible to operate them simultaneously and measure them.

(Effect of the Invention) According to the first aspect of the present invention, various equipment diagnoses of equipment can be automatically performed remotely, and the operation state of the equipment to be measured is guaranteed by the input of the operation state display signal. Therefore, reliable equipment diagnosis is possible. Moreover, since the background noise and other environmental noises are set and measured in advance in a small time period, the problem of the facility diagnosis due to the sound is minimized. At the time of measurement judgment, only background noise is measured first, and then the sound of the equipment under test during operation is measured and the two are compared.
Accurate facility diagnosis can be expected because the diagnosis is performed by calculation or the like.

Thus, when transmitting measurement data to a remote data analysis device, a reference signal is added, and fluctuations in the gain of this reference signal are judged before analysis to adjust the recorded data, so accurate data is used for the measurement. Various diagnoses can be performed with high reliability.

Moreover, in realizing the above-mentioned actions, all can be automated, so that an automatic remote diagnosis method can be easily configured.

In addition, even if there are multiple equipment under test in the same room, only one microphone sensor should be installed,
It is possible to efficiently measure and diagnose each equipment. In this case, the background noise is measured not only in the equipment under test but also in all other equipment in the room, so the stop signal at that time is not limited to the equipment under test. It is configured so that it can also be issued to other equipment. And the microphone sensor installed in the room can be used as an intercom.
No new wiring is required for each equipment, and the initial cost can be greatly reduced.

According to the second aspect of the present invention, while maintaining the effect of the first aspect of the invention as it is, it is possible to appropriately deal with the case where an external unexpected abnormal sound that is not related to the equipment to be measured occurs. It is possible to prevent an unexpected situation in remote diagnosis by sound and improve reliability.

[Brief description of drawings]

FIG. 1 is a block diagram of the embodiment. In the figure, 1 is a device start / stop / measurement signal trigger device, 2 is a measurement timing determination request signal transmitter, 3 is facility equipment, 4 is a device operating state transmitter, 5 is a data collection / analysis device, 6 is a switching device, Reference numeral 7 is a room to be measured, 8 is a microphone sensor, 9 is a reference level transmitter, and 10 is a reference level determination / signal level adjuster.

Front Page Continuation (72) Inventor Hiroyasu Suenaga 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Masakatsu Fukai 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Seiji Aokawa 5-37-8 Shiba, Minato-ku, Tokyo Sumitomo Mita Building Hibiya General Equipment Co., Ltd. (72) Inventor Shigeo Ueno 5-37-8 Shiba, Minato-ku, Tokyo Sumitomo Mita Building Hibiya General Equipment Co., Ltd. (56) Reference JP-A-63-226800 (JP, A) JP-A-59-178357 (JP, A) JP-A-57-34890 (JP, A)

Claims (2)

[Claims] 1. A measurement request signal issued at a pre-specified measurement and an operating state display signal of the equipment to be measured at this time are input to instruct the equipment to be measured to start and stop. Microphone sensors measure background noise at the time of stop in synchronization with the signal and driving sound at the time of steady operation, add a predetermined reference level signal to the measured data, and transmit this as recorded data to the data analyzer. Then, the input signal level of the measured signal is determined by the variation of the gain between the input signal and the measured signal in the reference level signal included in the recorded data, and the signal level of the recorded data is adjusted. A remote diagnosis method for facility equipment, which comprises diagnosing equipment under test by performing data analysis based on data. 2. A measurement request signal issued at a pre-specified measurement and an operating state display signal of the equipment under test at this time are input to instruct the equipment under test to start and stop the equipment. Microphone sensors measure background noise at the time of stop and driving sound at the time of stationary operation in synchronization with the signal, add a predetermined reference level signal to this measured data, and transmit this to the data analysis device as recorded data. Then, the input signal level of the measured signal is determined by the variation of the gain between the input signal and the measured signal in the reference level signal included in the recorded data, and the signal level of the recorded data is adjusted. When performing a data analysis based on data to diagnose the equipment under test, the basics of the equipment set in advance during the data analysis. Data is detected and abnormal data is detected, and the data re-recording signal based on this is used to order the equipment under test to start and stop again. A remote diagnosis method for equipment is characterized in that the operation sound is measured by a microphone sensor during normal operation to diagnose the equipment to be measured.