JPH04191623A - Apparatus for measuring noise of machinery - Google Patents

Abstract

PURPOSE:To measure and record the noise of machinery under low background noise by starting machinery to be measured and a noise meter on the basis of a signal detecting that the sound pressure of background noise is continued at the level of a predetermined value or less for a predetermined time and measuring and recording the noise emitted from the machinery. CONSTITUTION:A background noise detector 11 detecting background noise is connected to the output terminal of a noise meter 10 measuring noise and a starting apparatus 12 starting a drive apparatus 4 is connected to the output terminal of the detector 11 to constitute a noise measuring apparatus 8. This noise measuring apparatus 8 is arranged in a sitting room measuring the noise at the time of the operation of an elevator and the starting apparatus 12 and the drive apparatus 4 are connected by a cable K. The background noise detector 11 detects that noise is continued in the state of a predetermined level or less for a predetermined time on the basis of the sound pressure of the noise meter 10 to output a detection signal. At this time, the starting apparatus 12 is operated to start the drive apparatus 4 for a predetermined time and the elevator is driven and a recorder 13 is also operated to record the noise of the elevator.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an equipment noise measuring device, and more particularly to an equipment noise measuring device that measures noise generated from equipment in relation to background noise.

<Prior art> Generally, in order to accurately measure the sound pressure of noise from a device that generates noise, it is necessary to measure it under conditions where the surrounding background noise is as small as possible compared to the noise generated by the device. . For example, when developing an elevator to be installed in a high-rise residential building, it is necessary to ensure that the noise generated by the elevator is below a predetermined value even in living rooms adjacent to the elevator hoistway.

When measuring noise for this purpose, elevator noise is not a big concern during the day because the background noise inside the living room is relatively loud, but when the background noise inside the living room decreases at night, it becomes quite noticeable. Therefore, measurements must be taken at night when background noise is low. For this purpose, we set up a measuring device in the living room with permission from the resident, one of the engineers operated the elevator, and the other engineer operated the measuring device.
Noise caused by elevator operation is measured and recorded in the relevant room.

<Problems to be Solved by the Invention> The conventional noise measurement described above is carried out in the living room at night, which not only causes inconvenience to the occupants, but also reduces human resources by requiring engineers to work overtime. There are also problems in terms of costs. In order to solve these problems, JP-A-59-198
No. 19 and Japanese Unexamined Patent Publication No. 63-308523 disclose devices that accurately measure the noise of a device to be measured even if the background noise is greater than the noise generated by the device to be measured.

However, all of the devices disclosed in these disclosures use a plurality of microphones to measure noise and perform computer processing, and the measurement method is extensive, making the device complex and causing problems in terms of manufacturing costs.

The present invention was made in view of the current state of noise measurement as described above, and its purpose is to have a simple device configuration, to avoid problems in terms of manufacturing costs, and to reduce the amount of noise emitted from the equipment to be measured without causing trouble to outsiders. An object of the present invention is to provide a noise measuring device for equipment that can accurately measure and record the noise generated by the equipment.

<Means for Solving the Problem> The purpose is to measure the sound pressure of background noise in a noise measuring device for equipment that measures the noise of equipment that generates noise and records it on a recorder, and to a background noise detector that detects that the noise level is below a predetermined value within a certain period of time and emits a detection signal; a starting means that starts the equipment using the detection signal; This is achieved by providing a recording means for recording on a recorder.

<Operation> With this configuration, the background noise detector measures the sound pressure of background noise, and when this sound pressure becomes less than a predetermined value within a predetermined time, a detection signal is output from the background noise detector. . When this detection signal is input to the activation means, the activation means activates the equipment, the recording means records the noise generated from the equipment on the recorder, and the noise from the equipment is measured under conditions with low background noise. recorded.

<Example> An example of the present invention will be described below with reference to FIGS. 1 to 4.

Fig. 1 is a block diagram showing the configuration of the embodiment, Fig. 2 is an explanatory diagram showing the overall structure when the embodiment is applied to the measurement of elevator noise in a high-rise residential building, and Fig. 3 is the operation of the embodiment. FIG. 4 is a flowchart showing the operation of the embodiment.

In FIG. 2, B is a high-rise residential building, and this high-rise residential building B has living rooms 71 to 76, and in the example, living room 7 is provided.
A noise measuring device 8 is placed at 5 to measure noise.

A hoistway R is formed in the high-rise residential building B, and a machine room 3 is provided above the hoistway R. The machine room 3 includes a drive device 4 and a motor that is rotationally driven by the drive device 4. A pulley 2 interlocked with this motor is installed. A rope 5 is wound around this pulley 2, and an elevator car 1 is attached to this rope 5 so that it can move up and down within the hoistway R.

The above-mentioned noise measuring device 8 is a sound level meter l as shown in FIG.
O1 background noise detector 11, starting device 12, and recorder 13
A background noise detector 11 for detecting background noise is connected to the output terminal of a sound level meter IO for measuring noise, and a starting device 12 for starting the drive device 4 is connected to the output terminal of the background noise detector 11. A recorder 13 for recording noise is connected to this starting device 12. The noise measuring device 8 having such a configuration is placed in the living room 75 that measures the noise during operation of the elevator, and the starting device 12 of the noise measuring device 8 and the driving device 4 are connected by a cable to prepare for noise measurement. Complete. The background noise detector 11 detects noise at a predetermined level (for example, 30 dB) based on the sound pressure output of the sound level meter IO.
A detection signal is output upon detecting that the state of 1 or less continues for a predetermined period of time (for example, 15 minutes). Further, the starting device 12 is activated by a detection signal from the background noise detector 11, starts the drive device 4 for a predetermined period of time (for example, 5 minutes) to drive the elevator, and simultaneously activates the recorder 13 for this predetermined period of time. It has a function to record elevator noise.

Next, the operation of the embodiment will be explained with reference to FIGS. 3 and 4.

The noise measuring device 8 is set in the living room 75, and in step S1 of the flowchart of FIG. 4, at time 10 of FIG.
Start measurement from. The predetermined level and predetermined time at which the noise detector 11 issues a detection signal are respectively set to T as shown in FIG. Background noise is detected in step S2, and as shown in FIG.
When background noise P exceeding a predetermined sound pressure level L occurs at , re-measurement is started from time t1. When it is detected at time t2 that the state in which the sound pressure of the background noise is equal to or lower than the predetermined sound pressure level L continues for a predetermined period of time, the process proceeds to step S3, and the background noise detector 11 supplies the detection signal G2 to the activation device 12. In response to this detection signal G2, the activation device 12 operates the drive device 4 and the recorder 13 in step S4.

For this reason, the elevator is operated for a predetermined time by the drive device 4, and the noise emitted from the elevator is measured by the noise measuring device 8, and at the same time, the recorder 13, which is in the open operating state for the predetermined time, is transmitted as shown in 63 in step S5. The measured noise is recorded.

In this way, according to the embodiment, by simply setting the noise measuring device 8 in the living room 75 where elevator noise is to be measured, it detects that the background noise has continued at a predetermined level or less for a predetermined period of time, and automatically switches the elevator to a predetermined level. It is possible to record the noise generated by running the elevator over time, and accurately measure and record elevator noise in low-noise conditions. It does not disturb the occupants during measurement, and the engineer only needs to set the noise measuring device 8 in the living room and connect the starting device 12 and the driving device 4 with a cable, which greatly reduces labor costs. can be reduced.

Although the embodiment describes the case where elevator noise is measured, the present invention is not limited to the embodiment, and can be applied to, for example, the noise of an air conditioner in a living room, the noise of an aircraft, etc.

<Effects of the Invention> In the present invention, when it is detected that the sound pressure of background noise is less than a predetermined value within a predetermined time, the device is automatically started and the noise generated from the device is recorded in the recording means. We have developed a noise measuring device for equipment that can accurately measure the noise generated by equipment under background noise, eliminates the need for engineers to measure using partitions, reduces labor costs, and has a simple structure. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. FIG. 3 is a characteristic diagram illustrating the operation of the embodiment of the present invention, and FIG. 4 is a flowchart illustrating the operation of the embodiment of the present invention. l...Car, 4-...Drive device, 8...
...Noise measuring device, IO-...Sound level meter, 11
......Background noise detector, 12-...Starting device, 13...-Recorder.

Claims (1)

[Claims] (1) A noise measuring device for equipment that measures the noise of equipment that generates noise and records it on a recorder measures the sound pressure of background noise and confirms that this sound pressure is below a predetermined value within a predetermined time. It has a background noise detector that detects and issues a detection signal, a starting means that starts the device with the detection signal, and a recording device that records the noise generated from the device started in this way on the recorder. An equipment noise measuring device characterized by the following.