CN111817643B - Motor noise reduction system and method based on microphone array noise monitoring - Google Patents
Motor noise reduction system and method based on microphone array noise monitoring Download PDFInfo
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- CN111817643B CN111817643B CN202010589963.5A CN202010589963A CN111817643B CN 111817643 B CN111817643 B CN 111817643B CN 202010589963 A CN202010589963 A CN 202010589963A CN 111817643 B CN111817643 B CN 111817643B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
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- 230000005855 radiation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
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- Engineering & Computer Science (AREA)
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses a motor noise reduction system and method based on microphone array noise monitoring, and belongs to the field of motor noise monitoring methods. A motor noise reduction system based on microphone array noise monitoring comprises a power supply, a microphone array module, a main motor, a motor circuit control module, a first feedback motor, a second feedback motor and an embedded module, wherein the microphone array is arranged towards the main motor, the microphone array module is connected with the embedded module, the motor circuit control module is respectively connected with the main motor, the first feedback motor and the second feedback motor, and the power supply supplies power to the motor noise reduction system. The invention solves the problem of on-line monitoring of motor noise, can monitor the noise emitted by the motor according to the service condition and the service scene of the motor, and then feeds back to the control mechanism, changes parameters such as input current, voltage and the like of the motor, changes the noise emitted by the motor in real time, and realizes the purpose of reducing the noise.
Description
Technical Field
The invention relates to a motor noise reduction system and method based on microphone array noise monitoring, and belongs to the field of motor noise monitoring methods.
Background
How to realize the monitoring of motor noise so as to carry out the dynamic adjustment of motor noise reduction is a technical problem commonly related to the person skilled in the art.
In the prior art, the noise volume is observed manually, and whether the noise exceeds the standard is monitored in a manual judgment mode, so that the noise volume of the motor is adjusted manually. This method is clumsy and not accurate to adjust, and the adjustment inefficiency. In addition, the existing noise reduction method is to make articles only at the noise source, and noise reduction is carried out by adopting modes of adding a noise reduction protective cover and the like, so that the noise reduction effect is very limited.
Disclosure of Invention
The invention aims to provide a motor noise reduction system and a motor noise reduction method based on microphone array noise monitoring, which are mainly used for noise monitoring of a permanent magnet motor and can also be used for noise monitoring of other motors. The invention solves the problem of on-line monitoring of motor noise, can monitor the noise emitted by the motor according to the service condition and the service scene of the motor, and then feeds back to the control mechanism, changes parameters such as input current, voltage and the like of the motor, changes the noise emitted by the motor in real time, and realizes the purpose of reducing the noise.
The motor noise reduction system based on microphone array noise monitoring comprises a power supply, a microphone array module, a main motor, a motor circuit control module, a first feedback motor, a second feedback motor and an embedded module, wherein the microphone array faces to the main motor, the microphone array module is connected with the embedded module, the motor circuit control module is respectively connected with the main motor, the first feedback motor and the second feedback motor, and the power supply supplies power for the motor noise reduction system.
Further, the microphone array module is configured to collect background noise and electromagnetic noise sent by the main motor, convert the background noise and the electromagnetic noise into a voice signal, and send the voice signal to the embedded module;
the embedded module is used for receiving the voice signal of the microphone array module, analyzing and processing the voice signal, randomly adjusting the vibration frequencies of the first feedback motor and the second feedback motor through the motor circuit control module, and adjusting the input current of the main motor;
The motor circuit control module is used for being controlled by the embedded module, controlling the vibration frequency of the first feedback motor and the second feedback motor by generating two paths of random current and voltage, and controlling and adjusting the input current of the main motor by the embedded module;
The first feedback motor and the second feedback motor are used for randomly generating radial electromagnetic force and influencing electromagnetic force generated by the main motor;
the main motor is used for being controlled by the motor circuit control module to work.
Further, the first feedback motor and the second feedback motor are mounted at a main body housing of the main motor.
Further, the vibration frequencies of the first feedback motor and the second feedback motor are different.
The motor noise reduction method based on microphone array noise monitoring is applied to the motor noise reduction system based on microphone array noise monitoring, and comprises the following steps of:
Step one, setting a noise threshold B, and starting a main motor to work after a microphone array module collects background noise B1;
Step two, when the main motor starts to rotate, the microphone array module collects body noise of the main motor, and when the noise of the main motor is increased, excessive noise is generated, namely electromagnetic noise B2 is generated by the main motor, and the microphone array module collects the electromagnetic noise B2;
Step three, the embedded module receives the background noise B1 and the electromagnetic noise B2, judges whether the difference between the electromagnetic noise B2 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step four; otherwise, returning to the second step;
Step four, the embedded module starts a first feedback motor through a motor circuit control module, random current is input to the first feedback motor, and the first feedback motor generates random vibration so as to change the fixed vibration frequency of the main motor;
step five, a microphone array module collects a noise value B3;
Step six, the embedded module receives the noise value B3, judges whether the difference between the noise value B3 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step seven; otherwise, returning to the fifth step;
Step seven, the embedded module provides random current and voltage for the first feedback motor and the second feedback motor through the motor circuit control module, so that the first feedback motor and the second feedback motor generate random vibration, the integral vibration frequency of the main motor, the integral vibration frequency of the first feedback motor and the integral vibration frequency of the second feedback motor are changed, and integral noise is changed;
Step eight, a microphone array module collects a noise value B4;
Step nine, the embedded module receives a noise value B4, judges whether the difference between the noise value B4 and background noise B1 is larger than a noise threshold B, and if yes, executes step ten; otherwise, returning to the step eight;
Step ten, changing the input current harmonic value of the main motor;
step eleven, the microphone array module collects a noise value B5;
Step twelve, the embedded module receives the noise value B5, judges whether the difference between the noise value B5 and the background noise B1 is larger than a noise threshold B, and returns to the step four if yes; otherwise, returning to the step eleven.
The invention has the main advantages that:
(1) The microphone array sensor is used for monitoring the noise condition of the motor during working, and further controlling and reducing the noise of the main motor by feeding back the vibration frequency of the main motor which is interfered by the motor working. The invention can reduce the noise of the main motor in an active intervention mode, and the tolerable noise intensity is set by setting the threshold value.
(2) The invention adopts an embedded control mode, so that the motor control is intelligent, the application scene of the motor is wider, and the motor can be applied to various low-noise industries such as home appliances, automobiles and the like.
Drawings
Fig. 1 is a schematic structural diagram of a motor noise reduction system based on microphone array noise monitoring according to the present invention;
fig. 2 is a flow chart of a motor noise reduction method based on microphone array noise monitoring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention discloses an embodiment of a motor noise reduction system based on microphone array noise monitoring, the system comprises a power supply, a microphone array module, a main motor, a motor circuit control module, a first feedback motor, a second feedback motor and an embedded module, wherein the microphone array is arranged towards the main motor, the microphone array module is connected with the embedded module, the motor circuit control module is respectively connected with the main motor, the first feedback motor and the second feedback motor, and the power supply supplies power for the motor noise reduction system.
Further, the microphone array module is configured to collect background noise and electromagnetic noise sent by the main motor, convert the background noise and the electromagnetic noise into a voice signal, and send the voice signal to the embedded module;
The embedded module is used for receiving the voice signal of the microphone array module, analyzing and processing the voice signal, randomly adjusting the vibration frequencies of the first feedback motor and the second feedback motor through the motor circuit control module, and adjusting the input current of the main motor; the module is composed of an embedded system, and can receive and recognize the voice signal of the microphone array module so as to perform voice algorithm recognition. After the current is switched on, the embedded module receives background noise of the microphone array module, when the main motor works, electromagnetic noise of the main motor is received, noise of the main motor is calculated through difference, whether the noise reaches a threshold value B or not is judged, and the noise threshold value B is a preset value, namely the highest tolerated noise value. When the difference noise values B2, B3, B4 and B5 are larger than the threshold noise B, the embedded module controls the motor circuit control module to generate random current and voltage, so that the first feedback motor and the second feedback motor generate vibration randomly to influence the vibration noise of the main motor, and meanwhile, the embedded module controls the motor circuit control module to change the harmonic current of the input current of the main motor, and therefore the overall noise of the system is reduced.
The motor circuit control module is used for being controlled by the embedded module, controlling the vibration frequency of the first feedback motor and the second feedback motor by generating two paths of random current and voltage, and controlling and adjusting the input current of the main motor by the embedded module; the module can generate current and voltage which enable each motor to work, the frequency of the current and the voltage is variable, the module is controlled by the embedded module, and can randomly generate two paths of random current and voltage signals so as to control the first feedback motor and the second feedback motor, so that the vibration frequencies of the two paths of feedback motors are different, the radial electromagnetic force of the two paths of feedback motors is different in magnitude and direction, and the radial force and the direction of the two paths of feedback motors are integrated with the radial force and the direction of the main motor to influence the vibration of the stator surface of the main motor.
The first feedback motor and the second feedback motor are used for randomly generating radial electromagnetic force and influencing electromagnetic force generated by the main motor; the two paths of feedback motors can randomly generate radial electromagnetic force when in work, thereby influencing the electromagnetic force generated by the main motor, the size and the direction of the electromagnetic force generated by the main motor can be changed by the feedback motor, the comprehensive radial electromagnetic force is formed, the size and the direction of the comprehensive radial electromagnetic force are different from those of the original electromagnetic force generated by the main motor, and therefore, the surface vibration of a stator of the main motor is reduced, and the noise is reduced.
The main motor is used for being controlled by the motor circuit control module to work; when the main motor works, radial electromagnetic force is generated, the electromagnetic force can vibrate the surface of the stator, and high vibration noise is generated.
Further, the first feedback motor and the second feedback motor are mounted at a main body housing of the main motor.
Further, the vibration frequencies of the first feedback motor and the second feedback motor are different.
Specifically, the first feedback motor and the second feedback motor are small motors and are arranged at the main motor main body shell, and vibration energy of the feedback motor changes the vibration frequency of the whole system, so that the natural frequency of the main motor is changed, and noise is reduced. The power of the feedback motor is smaller, the embedded module can manage and control the motor circuit control module, so that random current and voltage are generated, the random current and voltage are input to the first feedback motor and the second feedback motor, the input current and the input voltage of each feedback motor are different, vibration is generated to be different, and then the inherent working frequency of the whole system including the main motor is changed, so that the surface vibration of the stator core of the main motor is changed, and the vibration radiation noise of the surface of the stator of the point of the main motor is changed. The motor circuit control module can generate input current for controlling the main motor and can change the harmonic current value of the input current of the main motor.
Referring to fig. 2, the invention discloses an embodiment of a motor noise reduction method based on microphone array noise monitoring, which is applied to the motor noise reduction system based on microphone array noise monitoring, and the motor noise reduction method comprises the following steps:
Step one, setting a noise threshold B, and starting a main motor to work after a microphone array module collects background noise B1;
Step two, when the main motor starts to rotate, the microphone array module collects body noise of the main motor, and when the noise of the main motor is increased, excessive noise is generated, namely electromagnetic noise B2 is generated by the main motor, and the microphone array module collects the electromagnetic noise B2;
Step three, the embedded module receives the background noise B1 and the electromagnetic noise B2, judges whether the difference between the electromagnetic noise B2 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step four; otherwise, returning to the second step;
Step four, the embedded module starts a first feedback motor through a motor circuit control module, random current is input to the first feedback motor, and the first feedback motor generates random vibration so as to change the fixed vibration frequency of the main motor;
step five, a microphone array module collects a noise value B3;
Step six, the embedded module receives the noise value B3, judges whether the difference between the noise value B3 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step seven; otherwise, returning to the fifth step;
Step seven, the embedded module provides random current and voltage for the first feedback motor and the second feedback motor through the motor circuit control module, so that the first feedback motor and the second feedback motor generate random vibration, the integral vibration frequency of the main motor, the integral vibration frequency of the first feedback motor and the integral vibration frequency of the second feedback motor are changed, and integral noise is changed;
Step eight, a microphone array module collects a noise value B4;
Step nine, the embedded module receives a noise value B4, judges whether the difference between the noise value B4 and background noise B1 is larger than a noise threshold B, and if yes, executes step ten; otherwise, returning to the step eight;
Step ten, changing the input current harmonic value of the main motor;
step eleven, the microphone array module collects a noise value B5;
Step twelve, the embedded module receives the noise value B5, judges whether the difference between the noise value B5 and the background noise B1 is larger than a noise threshold B, and returns to the step four if yes; otherwise, returning to the step eleven.
Claims (4)
1. The motor noise reduction system based on microphone array noise monitoring is characterized by comprising a power supply, a microphone array module, a main motor, a motor circuit control module, a first feedback motor, a second feedback motor and an embedded module, wherein the microphone array is arranged towards the main motor, the microphone array module is connected with the embedded module, the motor circuit control module is respectively connected with the main motor, the first feedback motor and the second feedback motor, and the power supply supplies power to the motor noise reduction system;
the microphone array module is used for collecting background noise and electromagnetic noise emitted by the main motor, converting the background noise and the electromagnetic noise into voice signals and transmitting the voice signals to the embedded module;
the embedded module is used for receiving the voice signal of the microphone array module, analyzing and processing the voice signal, randomly adjusting the vibration frequencies of the first feedback motor and the second feedback motor through the motor circuit control module, and adjusting the input current of the main motor;
The motor circuit control module is used for being controlled by the embedded module, controlling the vibration frequency of the first feedback motor and the second feedback motor by generating two paths of random current and voltage, and controlling and adjusting the input current of the main motor by the embedded module;
The first feedback motor and the second feedback motor are used for randomly generating radial electromagnetic force and influencing electromagnetic force generated by the main motor;
the main motor is used for being controlled by the motor circuit control module to work.
2. The microphone array noise monitoring based motor noise reduction system of claim 1, wherein the first feedback motor and the second feedback motor are mounted at a main body housing of the main motor.
3. The motor noise reduction system based on microphone array noise monitoring of claim 2, wherein the first feedback motor and the second feedback motor differ in vibration frequency.
4. A motor noise reduction method based on microphone array noise monitoring, which is applied to the motor noise reduction system based on microphone array noise monitoring as claimed in any one of claims 1 to 3, and is characterized in that the motor noise reduction method comprises the following steps:
Step one, setting a noise threshold B, and starting a main motor to work after a microphone array module collects background noise B1;
Step two, when the main motor starts to rotate, the microphone array module collects body noise of the main motor, and when the noise of the main motor is increased, excessive noise is generated, namely electromagnetic noise B2 is generated by the main motor, and the microphone array module collects the electromagnetic noise B2;
Step three, the embedded module receives the background noise B1 and the electromagnetic noise B2, judges whether the difference between the electromagnetic noise B2 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step four; otherwise, returning to the second step;
Step four, the embedded module starts a first feedback motor through a motor circuit control module, random current is input to the first feedback motor, and the first feedback motor generates random vibration so as to change the fixed vibration frequency of the main motor;
step five, a microphone array module collects a noise value B3;
Step six, the embedded module receives the noise value B3, judges whether the difference between the noise value B3 and the background noise B1 is larger than a noise threshold B, and if yes, executes the step seven; otherwise, returning to the fifth step;
Step seven, the embedded module provides random current and voltage for the first feedback motor and the second feedback motor through the motor circuit control module, so that the first feedback motor and the second feedback motor generate random vibration, the integral vibration frequency of the main motor, the integral vibration frequency of the first feedback motor and the integral vibration frequency of the second feedback motor are changed, and integral noise is changed;
Step eight, a microphone array module collects a noise value B4;
Step nine, the embedded module receives a noise value B4, judges whether the difference between the noise value B4 and background noise B1 is larger than a noise threshold B, and if yes, executes step ten; otherwise, returning to the step eight;
Step ten, changing the input current harmonic value of the main motor;
step eleven, the microphone array module collects a noise value B5;
Step twelve, the embedded module receives the noise value B5, judges whether the difference between the noise value B5 and the background noise B1 is larger than a noise threshold B, and returns to the step four if yes; otherwise, returning to the step eleven.
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| DE102020128824A1 (en) * | 2020-11-03 | 2022-05-05 | Bayerische Motoren Werke Aktiengesellschaft | Method and device for actively controlling vibrations in a vehicle with multiple electrical machine units |
| CN114002598A (en) * | 2021-11-25 | 2022-02-01 | 合肥融讯电子科技有限公司 | Motor noise detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014222324A (en) * | 2013-05-14 | 2014-11-27 | 株式会社Ihi | Noise reduction device and noise reduction method |
| CN109039187A (en) * | 2017-06-09 | 2018-12-18 | 通用汽车环球科技运作有限责任公司 | The method and apparatus generated for audible signal |
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| DE102007013719B4 (en) * | 2007-03-19 | 2015-10-29 | Sennheiser Electronic Gmbh & Co. Kg | receiver |
| US9276460B2 (en) * | 2012-05-25 | 2016-03-01 | Flextronics Ap, Llc | Power converter with noise immunity |
| JP6659583B2 (en) * | 2014-05-15 | 2020-03-04 | フェデラル エクスプレス コーポレイション | Wearable device for delivery processing and use thereof |
| US20170303052A1 (en) * | 2016-04-18 | 2017-10-19 | Olive Devices LLC | Wearable auditory feedback device |
| US10110986B1 (en) * | 2017-03-28 | 2018-10-23 | Motorola Mobility Llc | Haptic feedback for head-wearable speaker mount such as headphones or earbuds to indicate ambient sound |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014222324A (en) * | 2013-05-14 | 2014-11-27 | 株式会社Ihi | Noise reduction device and noise reduction method |
| CN109039187A (en) * | 2017-06-09 | 2018-12-18 | 通用汽车环球科技运作有限责任公司 | The method and apparatus generated for audible signal |
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