Single noise exposure protective device

A protection device and noise technology, which is used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem that the discrete parameters of components have a large influence on circuit indicators, the workload of circuit debugging and calibration is large, and the output content is not easy to understand. and other problems, to achieve the effect of small size, intuitive and easy-to-understand output, and convenient debugging

Inactive Publication Date: 2013-03-20
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

[0003] At present, the preamplification and frequency weighting of common noise meters or individual noise dosimeters on the market use analog circuits. The discreteness of component parameters has a great impact on circuit indicators, and the workload of circuit debugging and calibration is large.
In addition, the current common personal noise d...

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Embodiment Construction

[0021] Such as figure 1 , figure 2 An individual noise exposure protection device is shown, which is mainly used for the measurement of the dose received by an individual in the noise environment of life and work. This technology uses a digital microphone to collect noise signals in the environment, and after demodulation and frequency weighting Function modules such as sound intensity calculation and noise dose accumulation can measure the noise dose received by the human body and display it in grades according to the noise dose.

[0022] The whole protection device includes digital microphone, demodulation module, frequency weighting module, sound intensity calculation module, noise dose accumulation module and alarm output module; the demodulation module, frequency weighting module, sound intensity calculation module and noise dose accumulation module are all integrated On an FPGA chip.

[0023] The digital microphone collects the environmental noise and converts the col...

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Abstract

The invention discloses a single noise exposure protective device which comprises a digital microphone, a demodulation module, a frequency weighting module, a sound intensity calculating module, a noise dose accumulating module and an alarm output module. The digital microphone collects environmental noise and converts the noise collected into digital pulse signals. The demodulation module receives the digital pulse signals transmitted from the digital microphone, demodulates the digital pulse signals and converts the digital pulse signals into noise data. The frequency weighting module receives the noise data transmitted and handles the noise data in a frequency weighting mode. The sound intensity calculating module receives data signals transmitted from the frequency weighting module and obtains noise sound intensity after calculation and process. The noise dose accumulating module receives results of the sound intensity calculating module, conducts time accumulation and calculation for sound intensity in a working time range of the device, obtains total noise dose, and transmits the total noise dose to the alarm output module. The single noise exposure protective device is simple in debugging, stable in properties and suitable for being used by site workers.

Description

technical field [0001] The invention relates to the technical field of noise detection and processing, in particular to an individual noise dose measurement technology, and in particular to an individual noise exposure protection device. Background technique [0002] With the development of industrial production, transportation, and urban construction, as well as the increase of population density and the increase of household facilities (audio, air conditioning, television, etc.), environmental noise is becoming more and more serious, and it has become a major public hazard that pollutes the human social environment. Noise has the characteristics of locality, temporary and multiple. Noise brings physiological and psychological harm to people mainly in the following aspects: ① Interfering with rest and sleep, affecting work efficiency: Interfering with rest and sleep; reducing work efficiency. ② Damage to auditory and visual organs: Strong noise can cause ear discomfort, su...

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Application Information

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IPC IPC(8): G01H17/00
Inventor 李丽贺慧勇刘嘉文文一青郭春亮
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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