Method, system, separation device and medium for verifying noise separation effect of power equipment
A technology for noise separation and power equipment, which is applied to the measurement of ultrasonic/sonic/infrasonic waves, instruments, and measuring devices. Check for accurate results
Active Publication Date: 2021-06-11
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology
[0002] The noise detection of power equipment is easily disturbed by external environmental noise (such as: birdsong, insects, car whistle, etc.), and the conventional sound level meter measurement method is difficult to obtain accurate measurement results, and the detection efficiency is greatly reduced
Using the power equipment noise separation device can restore the pure power equipment noise signal from the disturbed noise signal, which improves the accuracy of the power equipment noise measurement results, but there is no method and system for testing the power equipment noise separation device. , it is impossible to pre-evaluate the separation effect before using the power equipment noise separation device, and the field verification has very strict requirements on the environmental noise around the power equipment, and it is very difficult to implement, which has a great impact on the popularization and application of the power equipment noise separation device
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[0029] Such as figure 1 As shown, the implementation steps of the method for verifying the noise separation effect of power equipment in this embodiment include:
[0030] 1) Generate a linear mixed noise signal, the linear mixed noise signal is generated by linear mixing of the standard source signal and the standard interference signal, and input the linear mixed noise signal into the noise separation device of the verified power equipment;
[0031] 2) Collect the output signal separated by the verified power equipment noise separation device for the current linear mixed noise signal, the output signal includes the separated source signal and interference signal;
[0032] 3) Obtain the sound pressure level of the separated source signal, and calculate and record the relative error between the separated source signal sound pressure level and the standard source signal sound pressure level;
[0033] 4) Determine whether the relative error between the recorded sound pressure le...
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The invention discloses a method, system, separation device and medium for verifying the noise separation effect of power equipment. The verification method of the invention includes generating a multi-line mixed noise signal and inputting it into the separation device, obtaining and calculating the sound pressure level of the source signal obtained after separation And record the relative error between the separated source signal sound pressure level and the standard source signal sound pressure level; if the relative error between the separated source signal sound pressure level and the standard source signal sound pressure level If it is within the limit value range, it is determined that the noise separation effect of the verified power equipment noise separation equipment is qualified. The invention can quickly verify the separation effect of the power equipment noise separation device before use, and the invention can complete the detection of the separation effect of the power equipment noise separation device without on-site testing, and can pre-evaluate the use effect of the device before use, which is convenient and quick , Test accurate technical advantages.
Description
technical field [0001] The invention relates to power equipment noise detection technology, in particular to a power equipment noise separation effect verification method, system, separation equipment and medium, which are used for power equipment noise separation effect verification. Background technique [0002] The noise detection of power equipment is easily disturbed by external environmental noise (such as birdsong, insects, car horns, etc.), and the conventional sound level meter measurement method is difficult to obtain accurate measurement results, and the detection efficiency is greatly reduced. Using the power equipment noise separation device can restore the pure power equipment noise signal from the disturbed noise signal, which improves the accuracy of power equipment noise measurement results, but there is currently no method and system for testing the power equipment noise separation device , It is impossible to pre-evaluate the separation effect before using...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 吴晓文卢铃曹浩胡胜陈炜彭继文吕建红
Owner STATE GRID HUNAN ELECTRIC POWER