JPS6315397A - Abnormal sound monitor for plant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an abnormal sound monitoring device for a plant that monitors the site condition while staying in a central control room and detects the occurrence of an abnormality early by sound. It is.

[Conventional technology]

Conventionally, for example, when monitoring a power plant, patrol equipment periodically patrols the inside of the power plant, and the conditions at the site are monitored by hearing.

[Problem that the invention seeks to solve]

Conventional power plant monitoring involves patrols as described above, which relies on human hearing, requires a large number of patrol tools, and requires regular patrols to detect abnormalities during the patrols. In addition to being limited, there were also problems such as individual differences in abnormality detection depending on experience with patrol equipment, skill, etc.

This invention was made to solve the above-mentioned problems.It is possible to monitor the situation at the site based on the sound level while staying in the central control room, and it also automatically detects the occurrence of abnormalities and alerts operators. The purpose of the present invention is to obtain an abnormal sound monitoring device that facilitates confirmation of abnormalities while providing on-site sounds.

[Means for solving problems]

The abnormal sound monitoring device according to the present invention detects sounds around the first patrol point using a microphone disposed at the first patrol point,
This system includes an abnormality detection section that displays and visualizes this sound level two-dimensionally on a CRT, and also detects abnormalities by comparing them with a pre-registered normal pattern and notifies the operator.

Σ｀・.

[Effect]

The abnormality detection unit in this invention determines that an abnormality occurs when the difference between the assumed operating state and a preset normal pattern exceeds a preset threshold, generates an alarm, and alerts the operator. By notifying the user and displaying the sound level around the abnormal location two-dimensionally on the CRT to encourage confirmation of the abnormal condition, operators can detect the abnormality at an early stage, confirm the abnormal condition, and quickly take action. This enables countermeasures to be taken.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1 is a microphone with directivity that detects surrounding sounds at the patrol point of the power plant, 2 is a signal converter that converts the acoustic signal output from microphone 1 from an analog signal to a digital signal, and 3 is a normal signal converter. An abnormality determination unit that determines an abnormality by comparing it with a pattern, 4 a sound level display processing unit that visualizes the sound level and displays it two-dimensionally around the patrol point, 5 a CRT, etc. that displays the sound level. 6 is an on-site sound output control unit for allowing sounds around the patrol point to be heard in the central control room, and 7 is an on-site sound output device for outputting on-site sounds.

Figure 2 shows an example of the configuration of a microphone 1 that detects sound around one area at a patrol point of a power plant. Eight microphones 1a to 1h are integrated and arranged radially in each direction. Microphone 1 is installed at the patrol point.

FIG. 3 shows an example of display on the display device 5.
In the figure, 51 is a sound level display, and 52 is a warning message display.

Next, the operation of the above embodiment will be explained.

Sounds around the patrol point of the power generation plant are inputted by a plurality of directional microphones 18 to 1h. The abnormality determination unit 3 compares the signals (sound levels) from the microphones 18 to 1h in each direction converted by the signal conversion unit 2 with a preset normal value, and determines an abnormality if the signal exceeds a preset threshold. Then, a sound level display command and a field sound output command are output to the sound level display processing section 4 and the field sound output control section 6.

In response to the above command, the display device Ft5 displays the sound level in a polygon graph 51 according to the sound receiving direction of the microphones 1a to 1h, as shown in FIG. 51 and a graph (shown by a solid line) 51' of a distorted abnormal state are superimposed on each other, and an alarm message 52 indicates monitoring points, noise levels, etc.
This provides information on the occurrence of abnormalities and abnormal conditions to operators in an easy-to-understand format. Moreover, the on-site sound output device 7
This provides on-site sound to operators in the central control room.

In addition, although the above embodiment was explained using a power generation plant as an example,
Other plants may be used, and the same effects as in the above embodiment can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, an abnormality due to the sound level around the patrol point is detected, and in addition to displaying an alarm, the sound level at the time of the abnormality is visually displayed in comparison with the sound level at the normal time. , it is possible to detect and confirm the occurrence of abnormalities early even when operators are not on patrol, allowing for safer plant operation, and has the effect of leading to labor savings such as reducing the number of patrols.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an abnormal sound monitoring device for a power plant according to an embodiment of the present invention, Fig. 2 is an installation state diagram of a microphone that detects surrounding sounds at a patrol point, and Fig. 3 is a display of a display section. FIG. 1 is a microphone, 2 is a signal conversion unit, 3 is an abnormality determination unit,
5 is the display section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) a plurality of microphones installed at patrol points of the plant and having directivity for detecting surrounding sounds; an abnormality determination unit that compares the acoustic signals output from the microphones with normal values to determine abnormality; An abnormal sound monitoring device for a plant, comprising: a display section that two-dimensionally displays the sound level from the abnormality determination section with the patrol point as the center. (2) The abnormal sound monitoring device for a plant according to claim (1), further comprising an on-site sound output device that outputs the acoustic signal output from the microphone as on-site sound.