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Personal noise dosimeter capable of measuring impulse noise

A technology of noise dose and pulse measurement, applied in the measurement of ultrasonic/sonic/infrasonic waves, measurement devices, instruments, etc., to achieve the effect of small size, easy portability, and high overall performance

Inactive Publication Date: 2021-02-09
HANGZHOU AIHUA INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problem that there is no device for measuring the occupational exposure limit of pulse noise in the existing technology; it provides a personal noise dosimeter capable of measuring the pulse noise, which can effectively measure the occupational exposure limit of pulse noise in the workplace Measurement

Method used

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Embodiment 1

[0020] Embodiment 1: A personal noise dosimeter capable of measuring impulse noise, such as figure 1 As shown, it includes a microphone 12, an AD conversion module 13, a single-chip microcomputer 14, a display module 15 and a memory 16. The input end of the microphone 12 inputs an ambient sound signal, and the microphone 12 is used to convert the acoustic signal into an electrical signal. The output end of the microphone 12 is connected to the The input end of AD conversion module 13 is connected, and AD conversion module 13 is used for converting analog signal into digital signal, and the output end of AD conversion module 13 is connected with single-chip microcomputer 14, and single-chip microcomputer 14 is used for judging whether acoustic signal is pulse noise and carries out mark recording , the display module 15 is connected with the single-chip microcomputer 14, the display module 15 is used to display the impulse noise measured by the single-chip microcomputer 14, the m...

Embodiment 2

[0026] Embodiment 2 is a personal noise dosimeter that can measure impulse noise. The difference between this embodiment and Embodiment 1 is that this embodiment adds an electronic switch, a power supply battery, a voltage dividing resistor and a positioning module. The first end is connected with the power supply battery, the control end of the electronic switch is connected with the single-chip microcomputer 14, the second end of the electronic switch is connected with the positioning module through the voltage dividing resistor, and the positioning module is connected with the memory 16, when the single-chip microcomputer 14 detects a pulse noise, Output a high-level signal to the control terminal of the electronic switch to turn on the electronic switch, the positioning module is powered on, records the current position and transmits the positioning information to the memory 16, and the memory 16 stores the pulse noise sound pressure level and the positioning information syn...

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Abstract

The invention discloses a personal noise dosimeter capable of measuring impulse noise. The dosimeter comprises a microphone, an AD conversion module, a single-chip microcomputer and a display module,an ambient sound signal is inputted into an input end of the microphone, the microphone is used for converting the sound signal into the electric signal, and the output end of the microphone is connected with the input end of the AD conversion module. The AD conversion module is used for converting an analog signal into a digital signal, the output end of the AD conversion module is connected withthe single-chip microcomputer, the single-chip microcomputer is used for judging whether the sound signal is impulse noise or not and conducting marking and recording, and the display module is connected with the single-chip microcomputer and used for displaying the impulse noise measured by the single-chip microcomputer. The pulse noise occupational contact limit value of the workplace is effectively measured, the device is high in overall performance, small in size and convenient to carry, the positioning module is arranged, when a user checks historical pulse noise, the user checks the position where the pulse noise occurs at the same time, the user can be away from the position conveniently when going out next time, and the influence of environmental noise on the health of the user isreduced.

Description

technical field [0001] The invention relates to the technical field of noise measurement, in particular to a personal noise dosimeter capable of measuring impulse noise. Background technique [0002] In GBZ2.2-2007 Occupational Exposure Limits of Hazardous Factors in the Workplace, there are two hygiene requirements for workplace noise occupational exposure limits: 1. Workplace noise occupational exposure limits; 2. Workplace pulse noise occupational exposure limits. [0003] At present, the noise measuring instruments on the market only measure the first item. Therefore, there is an urgent need for a device that can realize the measurement of the two hygienic requirements. [0004] For example, the application number is CN201510257190.X, and the Chinese patent application dated May 19, 2015 discloses a noise measurement method and device, a vibration measurement method and device, including the noise measurement device including: an anechoic chamber, Speed-regulating motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/06
CPCG01H11/06
Inventor 张自立
Owner HANGZHOU AIHUA INSTR
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