JPH05203542A - Method for diagnosing fault of apparatus - Google Patents

Abstract

PURPOSE:To diagnose the faults of apparatuses by using the synthesized noise value or the synthesized vibration value of each apparatus when a plurality of apparatuses of the same or different kinds are monitored. CONSTITUTION:The synthesized value of the noises at the time of the normal operations of fans 6 and 7 and pumps 3-5, which are arranged in a machine room 1, is measured with a microphone 8 and stored as the normal value. The synthesized vibration value of the vibrations at the time of the normal operations of the fans 6 and 7 and the pumps 3-5 is measured with a vibrometer 9 and stored as the normal value. During the operations of the fans 6 and 7 and the pumps 3-5, the synthesized noise (vibration) values of the fans 6 and 7 and the pumps 3-5 are measured all the time. A monitoring person in a monitoring room 2 compares the measured values with the normal values and judges whether the measured values are the abnormal values or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of monitoring the state of equipment by the noise or vibration of the equipment in the equipment composed of the equipment generating noise or vibration, and more particularly to a plurality of equipment and a single or plural types. It is used for failure diagnosis of equipment.

[0002]

2. Description of the Related Art Conventionally, when diagnosing a failure of a plurality of devices and a single device or a plurality of devices, an abnormality of the device is detected by using a noise value or a vibration value measured for each device.

However, by measuring the noise value or the vibration value from a plurality of devices and a single or a plurality of types of devices, that is, by measuring the combined noise value (or vibration value) of the plurality of devices, There is no way to detect anomalies.

[0004]

Conventionally, the operating state of a device is monitored using the noise value and vibration value measured for each device. Therefore, as the number of operating equipment increases,
There is a problem that the number of sensors or the like for measuring the noise value or the vibration value of the device increases.

The present invention has been made in view of the above circumstances, and measures the noise value or the vibration value of a single or a plurality of types of equipment and monitors the state of the equipment to detect abnormalities. An object of the present invention is to provide a failure diagnosis method for a device to be detected.

[0006]

A method of diagnosing a failure of a device according to the present invention is a method of diagnosing a failure of a plurality of devices, wherein one of synthetic noise and synthetic vibration during normal operation of the plurality of devices is previously set. , Or both are measured and stored, the normal value stored in advance and the measured value during normal operation of the plurality of devices are compared, and an abnormal state of the device is detected from the comparison result. To do.

[0007]

First, only characteristic values of the plurality of devices during normal operation are measured, and the characteristic values are stored as the normal values of the devices. This normal value is compared with the characteristic value measured during the operation of the device, and an abnormality of the device is detected from the comparison result.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A device failure diagnosis method according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the arrangement of devices and sensors according to an embodiment of the present invention. FIG. 2 is an elevation view showing the arrangement of the devices and sensors shown in FIG.

In the machine room 1 shown in FIG. 1, noise and vibration from the outside are blocked by a wall 11. Two fans 6, 7 and three pumps 3 to 5 (devices) are installed in a specific space on the floor of the machine room 1 (in the same building). It should be noted that one of the three pumps is a spare one, and there is no spare fan.

A microphone 8 is installed at a specific position on the ceiling between the pumps 3 to 5 and the fans 6 and 7, and a vibrometer 9 is installed on the floor between the pumps 3 to 5 and the fans 6 and 7. Is installed. The microphone 8 measures a combined noise value of the pumps 3 to 5 and the fans 6 and 7 (hereinafter, combined noise value). The vibration meter 9 measures a combined vibration value of the pumps 3 to 5 and the fans 6 and 7 (hereinafter referred to as a combined vibration value). The microphone 8 and the vibration meter 9 are connected by a communication cable or the like to an indicator 10 installed in the monitoring room 2 (for example, a central control room). The monitoring room 2 is separated from the machine room 1, and a monitoring person (operator) in the monitoring room 2 constantly monitors the state of the equipment. Next, a method of diagnosing the failure of the pumps 3 to 5 and the fans 6 and 7 will be described.

First, the combined noise value of the pumps 3 to 5 and the fans 6 and 7 during normal operation is measured by the microphone 8 and stored as a normal value. In this case, pumps 3, 4,
Three combinations of the pumps 3, 5 and the pumps 4, 5 are conceivable, and the combined noise value for each of the fans 6, 7 and the pumps 3, 4, 5 is measured and stored. For example, the combined noise value during operation of the pumps 3, 4 and the fans 6, 7 is measured and stored.

Similarly, regarding the combined vibration values of the pumps 3 to 5 and the fans 6 and 7 during normal operation, the pumps 3,
Measurement is performed and stored for each of the three combinations of 4, pumps 3, 5, and pumps 4, 5. For example, the combined vibration value during operation of the pumps 3 and 4 and the fans 6 and 7 is measured and stored.

Next, when the equipment is operated by each combination, the synthetic noise value and the synthetic vibration value are measured and compared with the normal value to constantly monitor whether or not each equipment is operating normally. ..

For example, when an abnormality occurs in any of the pumps 3 and 4 during the operation of the fans 6 and 7 and the pumps 3 and 4, the synthetic noise value and the synthetic vibration value different from the normal values are instructed to the monitoring room 2. It is displayed in total 10.

The person in the monitoring room 2 judges whether the numerical values of the synthetic noise value and the synthetic vibration value displayed on the indicator 10 are within the allowable values, and the fans 6, 7 and the pumps 3, 4 are determined. To determine if the is operating normally.

When the supervisor judges that the synthetic noise value and the synthetic vibration value displayed on the indicator 10 are abnormal values,
Dispatch an inspector to machine room 1. The dispatched inspector specifies a device in which an abnormality has occurred among the fans 6 and 7 and the pumps 3 and 4, and performs inspection work. This maintains the safe operation of the equipment. By performing the device failure diagnosis by the method as described above, the operating state of the device can be constantly monitored, and the device abnormality can be detected early.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, both the synthetic noise value and the synthetic vibration value were measured, but the state of the device may be monitored by measuring only either the synthetic noise value or the synthetic vibration value.

[0018]

As described above, according to the present invention,
It is possible to provide a device failure diagnosis method for early detecting an abnormality of a device from combined noise and vibration from a plurality of devices and a single or a plurality of types of devices.

[Brief description of drawings]

FIG. 1 is a plan view showing an arrangement of devices and sensors according to an embodiment of the present invention.

FIG. 2 is an elevation view showing an arrangement of devices and sensors according to the same embodiment.

[Explanation of symbols]

1 ... Machine room, 2 ... Monitoring room, 3-5 ... Pump, 6, 7 ... Fan, 8 ... Microphone, 9 ... Vibrometer, 10 ... Indicator, 11, 12 ... Wall.

Claims (1)

[Claims] 1. A method for diagnosing a failure of a plurality of devices, wherein one or both of synthetic noise and synthetic vibration during normal operation of the plurality of devices is measured and stored in advance,
A method of diagnosing a failure of a device, comprising: comparing a normal value stored in advance with a measured value of the plurality of devices during normal operation, and detecting an abnormal state of the device from the comparison result.