RU162541U1 - DEVICE FOR CONTROL OF NOISE ENVIRONMENT AT PRODUCTION FACILITIES - Google Patents

Abstract

A device for monitoring the noise environment at production facilities, having noise sensors, light signaling panels for noise level, a control unit, a presence sensor for turning on the device only for a period of stay in the personnel room, characterized in that it further comprises a sensor for applying personal protective equipment, made with the possibility of applying a signal to the control unit to turn off the measuring path when removing the headphones from it and to turn it on when returning them to the sensor for the use of PPE (individual means dual protection).

Description

DEVICE FOR CONTROL OF NOISE ENVIRONMENT AT PRODUCTION FACILITIES

The utility model relates to the field of labor protection and can be used to control the noise situation at the workplaces of production facilities with a variable noise level.

Such objects are the premises of compressor stations (CS), gas distribution stations (GDS), workshops, and others. The noise level in them depends on the frequency and mode of operation of the equipment and seasonal load.

Noise control at workplaces is carried out in the process of a special assessment of working conditions once every 5 years and within the framework of sanitary and hygienic control once a year. [1] (Federal Law of December 28, 2013 N 426-ФЗ "On the Special Assessment of Working Conditions"), [2] (SN 2.2.4 / 2.1.8.562-96 "Noise at workplaces, in residential, public buildings and residential areas ").

When planning a noise measurement, integrating-averaging class 1 sound level meters are used according to [3] GOST 17187-2010 “Sound level meters. Part 1. Technical requirements. " The noise levels measured at the control points are reduced to the equivalent level over an 8-hour working day. The result obtained extends to the entire control period, i.e. calendar year, excluding seasonal fluctuations in the load of the production facility. The established frequency does not allow full control of fluctuations in the noise level at specific workplaces when changing the production mode of equipment operation. With increasing noise in the room, personnel must use personal protective equipment (PPE) - headphones, earplugs, but subjective assessment of workers may be exposed to noise exceeding the maximum permissible level (PDU).

The main disadvantage of this approach is the impossibility of constant monitoring of the noise situation at the workplace to assess the need for the use of hearing protection PPE.

A device is known for periodically measuring the level of audible noise. [4] (http://microom.ru/signalizators/16-shema-signalizatora-shuma.html). This device, if the noise level exceeds a predetermined threshold by means of a control unit (relay), includes a light alarm panel (signal lamp or display). The noise sensor is an electret microphone from an electronic telephone or from a portable tape recorder. Sensitivity is set by a variable resistor that controls the sensitivity of the microphone. In the absence of noise exceeding the value set by the resistor, the contacts of the output relay are open. As soon as the noise volume reaches the set threshold, the contacts of the output relay turn on and keep on for about 8 seconds. Then the contacts open, and the circuit goes into pause mode, which lasts for two minutes. After a pause, the circuit starts measuring noise again, and if its volume is above a predetermined threshold, it switches on the relay. The main components of the model are also an amplifier stage, a diode detector and a transistor switch.

The closest in technical essence and the achieved result to the claimed utility model is a portable device for measuring noise, described in the application for the invention [5] US 20150223000 A1 (PLANTRONICS), 08/06/2015, 14 pages. This device contains a microphone, light-signal panel, control unit, presence sensor, which ensures that the processor is switched on in the measurement mode only if it is in the working room. The alarm is triggered when the specified noise level is exceeded.

A common disadvantage of the described devices is that they are not associated with the use of PPE of the hearing organs at the moments of operation of the signal exceeding the remote control noise.

The purpose of this utility model is to create a device for monitoring the noise situation at workplaces of production facilities with a variable noise level, ensuring the interconnection of the sensors with the use of PPE of the hearing organs.

The essence of this utility model lies in the fact that the claimed device for monitoring the noise situation at production facilities, having noise sensors, light signaling panels, a control unit, a presence sensor for turning on the device only for the period of stay in the premises of personnel, according to the utility model, is additionally contains a sensor for the use of personal protective equipment, configured to supply a signal to the control unit to turn off the measuring path when removing the headphones s and switch on when returning to their use PPE sensor.

In FIG. A model of a device for monitoring noise conditions at production facilities is shown, where:

1 - production equipment (noise source);

2 - presence sensor;

3 - noise sensors;

4 - panel light signaling permissible noise level;

5 - panel light signaling excess remote control noise;

6 - control unit;

7 - sensor for the use of PPE;

8 - headphones;

9 - communication line of the sensor for the use of PPE.

The inventive device operates as follows.

When personnel enter the room with production equipment 1 with a variable noise level, the presence detector 2 is triggered to turn on the measuring path. The noise sensors 3 are adjusted so that when the noise level is less than the remote control, the light signaling panel of the permissible noise level 4 is turned on, when the sound threshold is exceeded, the light signaling panel of exceeding the noise remote control 5 is turned on. The control unit 6 allows you to change the light alarm threshold. When you turn on the light alarm panel when the remote control exceeds the noise level 5, the worker must use PPE for the hearing organs. The application sensor PPE 7 (lever in the pressed position) when removing the headphones 8 through the communication line 9 sends a signal to the control unit 6 to turn off the noise measurement and alarm system. When the headphones 8 return to the sensor for the use of PPE 7, it transitions to the pressed position and the measurement system is turned on. The measuring system is switched off further by the signal from the presence detector 2 when personnel leave the room.

Thus, the proposed utility model can be disabled when an employee leaves the premises and when they use PPE in an unfavorable noise environment. In all other cases, the noise level is measured and the corresponding safety alarm is given in the presence of the worker in the room.

The proposed device for monitoring the noise situation at production facilities with a variable noise level allows to increase the degree of protection of workers from exposure to noise, which is a harmful production factor, does not require high costs, is easy to install.

INFORMATION SOURCES:

1. Federal law dated December 28, 2013 N 426-ФЗ "On a special assessment of working conditions."

2. SN 2.2.4 / 2.1.8.562-96 “Noise at workplaces, in the premises of residential, public buildings and in residential areas”.

3. GOST 17187-2010 “Sound level meters. Part 1. Technical requirements "

4.http: //microom.ru/signalizators/16-shema-signalizatora-shuma.html.

5. US 20150223000 Al (PLANTRONICS), 08/08/2015, 14 pp.

Claims (1)

A device for monitoring the noise situation at production facilities, having noise sensors, light signaling panels for noise level, a control unit, a presence sensor for turning on the device only for the period of stay in the personnel room, characterized in that it further comprises a sensor for applying personal protective equipment, made with the possibility of applying a signal to the control unit to turn off the measuring path when removing the headphones from it and to turn it on when returning them to the sensor for the use of PPE (individual means dual protection).

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