Dynamic parameter calibration method and calibration device for whistling snapshot system

A calibration method and system dynamic technology, applied in the direction of measuring devices, traffic control systems, radio wave measurement systems, etc., can solve the problems of using units, inability to fully evaluate the performance of whistle sound capture, etc., and achieve a breakthrough in the use of static standards The effect of precise and efficient metering

Active Publication Date: 2021-03-16
ZHEJIANG MEASUREMENT SCI RES INST
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Problems solved by technology

However, these studies only focus on the static characteristics of the whistle capture system, and the noise sources that need to be captured in practical applications are all moving. Capturing performance of flut

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  • Dynamic parameter calibration method and calibration device for whistling snapshot system
  • Dynamic parameter calibration method and calibration device for whistling snapshot system
  • Dynamic parameter calibration method and calibration device for whistling snapshot system

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Embodiment Construction

[0026] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] figure 1 Calibration block diagram for whistle capture system. The measurement and calibration device includes a multi-channel signal excitation system 1, a standard sound source system 2, a signal acquisition and analysis system 3, a time measurement system 4 and a host computer system 5. Among them, the multi-channel signal excitation system 1 is composed of a signal generator 11 and a multi-channel power amplifier 12; the standard sound source system 2 is composed of a standard sound source array element 21 and a linear slide rail 22; the signal acquisition and analysis system 3 is composed of a reference microphone 31 and The sound analyzer 32 constitutes.

[0028] Such as figure 2 As shown, the standard sound source system 2 in this embodiment includes N standard sound source array elements 21 distribut...

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Abstract

The invention relates to a whistling snapshot system dynamic parameter metering calibration method and a calibration device thereof. According to the method, the noise distribution of a moving sound source is simulated by adopting a method of sequentially producing sound by each sound array element of a standard sound source system, the dynamic positioning error of the whistling snapshot system iscalibrated, and the response time of the whistling snapshot system is calibrated by measuring the whistling sound receiving moment of a reference microphone and the sound image generation moment of the whistling snapshot system, and the accurate measurement and calibration of dynamic parameters of the whistling snapshot system are realized. The metering calibration device of the whistling snapshot system comprises a multi-channel signal excitation system, a standard sound source system, a sound signal acquisition and analysis system, a time measurement system and an upper computer system. According to the invention, the dynamic parameters of the whistling snapshot system can be calibrated by adopting the metering calibration method, and the performance of the whistling snapshot system isensured.

Description

technical field [0001] The invention relates to a measurement calibration method and a calibration device thereof, in particular to a dynamic parameter calibration method and a calibration device of a whistling and snapping system. Background technique [0002] With the rapid development of the economy, the number of motor vehicles in various cities has increased year by year. As of June 2020, the number of motor vehicles in the country has reached 360 million according to the statistics of the Ministry of Public Security of my country. While these motor vehicles on the urban roads create convenience for people, they also bring serious noise pollution. The traffic management and environmental protection departments of various regions restrict and control motor vehicle honking behavior in densely populated urban areas or road sections, such as hospitals, sanatoriums, residential areas, schools, etc., prohibit honking, and formulate and promulgate corresponding laws and rules...

Claims

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Application Information

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IPC IPC(8): H04N17/00G08G1/017G01S5/18
CPCH04N17/002G08G1/0175G01S5/18
Inventor 吴德林姚磊高申平张志凯王萧博张亨达俞醒言
Owner ZHEJIANG MEASUREMENT SCI RES INST
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