CN214012497U - Active noise reduction device of household appliance and household appliance - Google Patents
Active noise reduction device of household appliance and household appliance Download PDFInfo
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- CN214012497U CN214012497U CN202022322867.2U CN202022322867U CN214012497U CN 214012497 U CN214012497 U CN 214012497U CN 202022322867 U CN202022322867 U CN 202022322867U CN 214012497 U CN214012497 U CN 214012497U
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Abstract
The embodiment of the utility model discloses device and tame electric installation of making an uproar falls in tame electric installation's initiative, the device includes: noise collection system, digital signal processing chip, power amplifier and piezoceramics piece, wherein: the noise acquisition device is installed on the vibrations part of household electrical appliances, and noise acquisition device, power amplifier are connected with digital signal processing chip electricity respectively, and the power amplifier is connected with the piezoceramics piece electricity, and the piezoceramics piece is installed on vibrations part. The active noise reduction device comprising the noise acquisition device, the digital signal processing chip, the power amplifier and the piezoelectric ceramic piece is arranged in the household appliance, so that the piezoelectric ceramic piece is controlled by the digital signal processing chip to generate vibration with the same amplitude, the same frequency and the opposite phase with the vibration part, the vibration of the vibration part is restrained in real time, and the purpose of active noise reduction is achieved.
Description
Technical Field
The utility model relates to a field of making an uproar especially relates to a device and electrical equipment fall in initiative of electrical equipment of making an uproar.
Background
With the development of scientific technology, the induction cooker is generally applied to daily life, but noise generated when the induction cooker works can not only affect the mood of a user, but also can affect the hearing of the user in a noise environment for a long time, most induction cookers in the market at present do not have a noise reduction function, or a part of induction cookers have the noise reduction function but also achieve noise reduction through a method of adding a buffer device in a structure, the method can lead to a complex structure, and can not be adjusted in real time according to specific conditions to achieve a better noise reduction effect, so that the noise reduction effect is not obvious.
Disclosure of Invention
Based on this, it is necessary to provide a device and domestic electric installation of making an uproar falls in the initiative of domestic electric installation to be necessary to the above-mentioned problem, the utility model discloses the purpose is through setting up the device of making an uproar falls in the initiative of including noise pickup assembly, digital signal processing chip, power amplifier and piezoceramics piece in domestic electric installation to reach digital signal processing chip control piezoceramics piece production with vibrations part with the amplitude, with frequency and opposite phase's vibrations, realized the suppression to vibrations of vibrations part in real time, reached the purpose of making an uproar falls in the initiative.
In a first aspect, the present application provides an active noise reduction apparatus for a home appliance, where the active noise reduction apparatus for a home appliance includes: noise collection system, digital signal processing chip, power amplifier and piezoceramics piece, wherein:
the noise acquisition device is arranged on a vibration component of the household appliance;
the noise acquisition device and the power amplifier are respectively and electrically connected with the digital signal processing chip;
the power amplifier is electrically connected with the piezoelectric ceramic piece;
the piezoelectric ceramic plate is arranged on the vibration component.
In one example, the noise collecting device includes: a sensor and/or microphone;
the sensor and/or the microphone are/is electrically connected with the digital signal processing chip.
In one example, the digital signal processing chip includes: the device comprises a first analog-to-digital converter, a digital-to-analog converter, a self-adaptive filter and a control module;
the first analog-to-digital converter, the adaptive filter, the control module, the digital-to-analog converter and the power amplifier are electrically connected in sequence;
the first analog-to-digital converter is used for being electrically connected with the sensor.
In one example, the digital signal processing chip further comprises a second analog-to-digital converter;
the second analog-to-digital converter is electrically connected with the adaptive filter;
the second analog-to-digital converter is electrically connected with the microphone.
In one example, the sensor is: a piezoelectric vibration sensor, an eddy current vibration sensor, an inductive vibration sensor, a capacitive vibration sensor, or a resistive strain gauge vibration sensor.
In one example, the active noise reduction apparatus of the home appliance further includes: a power supply module;
the power module is electrically connected with the digital signal processing chip.
In one example, the active noise reduction apparatus of the home appliance further includes: the display screen module and the display lamp module;
the display screen module is electrically connected with the digital signal processing chip;
the display lamp module is electrically connected with the digital signal processing chip.
In one example, the display screen module is an LED display screen or an OLED display screen.
In one example, the display lamp module includes a preset number of LED lamps.
In a second aspect, the present application provides a home appliance, where the home appliance includes any one of the active noise reduction devices described above.
Adopt the embodiment of the utility model provides a, following beneficial effect has:
adopt the utility model discloses a device and electrical home appliances of making an uproar fall in electrical home appliances's initiative, this electrical home appliances's the device of making an uproar fall in the initiative includes: noise collection system, digital signal processing chip, power amplifier and piezoceramics piece, wherein: the noise acquisition device is installed on the vibrations part of household electrical appliances, and noise acquisition device, power amplifier are connected with digital signal processing chip electricity respectively, and the power amplifier is connected with the piezoceramics piece electricity, and the piezoceramics piece is installed on vibrations part. The active noise reduction device comprising the noise acquisition device, the digital signal processing chip, the power amplifier and the piezoelectric ceramic piece is arranged in the household appliance, so that the piezoelectric ceramic piece is controlled by the digital signal processing chip to generate vibration with the same amplitude, the same frequency and the opposite phase with the vibration part, the vibration of the vibration part is restrained in real time, and the purpose of active noise reduction is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a block diagram of an active noise reduction apparatus of a home appliance in an embodiment of the present application;
fig. 2 is a block diagram of an active noise reduction device of a household appliance in which a noise collection device is a sensor according to an embodiment of the present application;
fig. 3 is a block diagram of an active noise reduction device of a household appliance in which a noise collection device is a microphone according to an embodiment of the present application;
fig. 4 is a block diagram of an active noise reduction device of a household appliance in which a noise collection device is a sensor and a microphone according to an embodiment of the present disclosure;
fig. 5 is another structural block diagram of an active noise reduction apparatus of a home appliance based on the structural block diagram shown in fig. 1 in the embodiment of the present application;
fig. 6 is another structural block diagram of the active noise reduction apparatus of the home appliance based on the structural block diagram shown in fig. 5 in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a block diagram of an active noise reduction apparatus of a home appliance in an embodiment of the present application is shown, where the active noise reduction apparatus 101 of the home appliance includes: noise collection system 102, digital signal processing chip 103, power amplifier 104 and piezoceramics piece 105, wherein: the noise acquisition device 102 is installed on a vibration part of the household appliance, the noise acquisition device 102 and the power amplifier 104 are respectively and electrically connected with the digital signal processing chip 103, the power amplifier 104 is electrically connected with the piezoelectric ceramic piece 105, and the piezoelectric ceramic piece 105 is installed on the vibration part.
In this embodiment of the present application, the active noise reduction apparatus 101 of the home appliance includes: the noise collection device 102, the digital signal processing chip 103, the power amplifier 104 and the piezoelectric ceramic plate 105, wherein the noise collection device 102 is installed on a vibration component of the household appliance, when the household appliance works, the vibration component vibrates, the vibration data of the vibration component collected by the noise collection device 102 is converted into an analog electric signal and sent to the digital signal processing chip 103, the digital signal processing chip 103 receives the vibration data sent by the noise collection device 102 and obtains a control signal, the digital signal processing chip 103 sends the control signal to the power amplifier 104 for amplification to obtain an amplified control signal, the piezoelectric ceramic plate 105 is driven to vibrate by the amplified control signal, the vibration generated by the piezoelectric ceramic plate 105 and the vibration generated by the vibration component are vibration with the same amplitude, the same frequency and opposite phase, therefore, the vibration generated by the piezoelectric ceramic piece 105 can inhibit the vibration of the vibration component, so as to achieve the purpose of eliminating the noise generated by the vibration of the vibration component, thereby realizing the effect of active noise reduction.
Referring to fig. 2 to 4, fig. 2 is a block diagram of an active noise reduction device of a home appliance in which a noise collection device is a sensor in the embodiment of the present application, fig. 3 is a block diagram of an active noise reduction device of a home appliance in which a noise collection device is a microphone in the embodiment of the present application, and fig. 4 is a block diagram of an active noise reduction device of a home appliance in which a noise collection device is a sensor and a microphone in the embodiment of the present application.
In the embodiment of the present application, the noise collection device 102 includes: the sensor 201 and/or the microphone 301, and the sensor 201 and/or the microphone 301 are electrically connected with the digital signal processing chip 103.
In the embodiment of the present application, the digital signal processing chip 103 includes: the sensor comprises a first analog-to-digital converter 202, a digital-to-analog converter 205, an adaptive filter 203 and a control module 204, wherein the first analog-to-digital converter 202, the adaptive filter 203, the control module 204, the digital-to-analog converter 205 and the power amplifier 104 are electrically connected in sequence, and the first analog-to-digital converter 202 is used for being electrically connected with the sensor 201.
In the embodiment of the present application, the digital signal processing chip 103 further includes a second analog-to-digital converter 302, the second analog-to-digital converter 302 is electrically connected to the adaptive filter 203, and the second analog-to-digital converter 302 is configured to be electrically connected to the microphone 301.
In the embodiment of the present application, the sensor 201 is: a piezoelectric vibration sensor, an eddy current vibration sensor, an inductive vibration sensor, a capacitive vibration sensor, or a resistive strain gauge vibration sensor.
In the present embodiment, the sensor 201 is a vibration sensor, which mainly receives mechanical energy and converts the mechanical energy into electrical energy proportional to the mechanical energy, and is also called transducer, vibration pickup, etc. since it is an electromechanical conversion device. The vibration sensor does not directly convert the original mechanical quantity to be measured into electric quantity, but uses the original mechanical quantity to be measured as the input quantity of the vibration sensor, then receives the input quantity by the mechanical receiving part to form another mechanical quantity suitable for conversion, and finally converts the mechanical quantity into electric quantity by the electromechanical conversion part. The operation performance of a shock sensor is thus determined by the operation performance of the mechanical receiving section and the electromechanical transducing section.
Further, the vibration sensor may be classified into the following methods according to its function: the vibration sensor according to the mechanical receiving principle can be divided into: a relative vibration sensor and an inertial vibration sensor; the vibration sensor according to the electromechanical transformation principle can be divided into: the vibration sensor comprises an electrodynamic vibration sensor, a piezoelectric vibration sensor, an eddy current vibration sensor, an inductive vibration sensor, a capacitive vibration sensor, a resistive vibration sensor and a photoelectric vibration sensor; the vibration sensor can be divided into: displacement sensor, speed sensor, acceleration sensor, force sensor, strain sensor, torsional vibration sensor, torque sensor.
The piezoelectric vibration sensor has a working principle that when some crystals deform under the action of an external force in a certain direction, charges are generated on a crystal surface or a polarization surface of the crystals, the conversion from mechanical energy (force, deformation) to electric energy (charge, electric field) is called positive piezoelectric effect, and the conversion from the electric energy (charge, electric field) to the mechanical energy (force, deformation) is called inverse piezoelectric effect. Therefore, the piezoelectric vibration sensor utilizes the piezoelectric effect of the crystal when collecting the vibration data. The eddy current type vibration sensor accurately measures the relative position of a measured body (which must be a metal conductor) and the end face of a probe through the principle of an eddy current effect, when the distance between the measured metal and the probe is changed, the Q value of a coil in the probe is also changed, the change of the Q value causes the change of the amplitude of oscillation voltage, the oscillation voltage which is changed along with the distance is converted into the change of voltage (current) through the processes of detection, filtering, linear compensation and amplification normalization, and finally the mechanical displacement (gap) is converted into the voltage (current). The inductance type vibration sensor is a device for realizing non-electricity quantity electric measurement by utilizing the self inductance or the change of mutual inductance coefficient of a coil. By using the inductive vibration sensor, parameters such as displacement, pressure, vibration, strain, flow and the like can be measured. The capacitance type vibration sensor is actually a capacitor with variable parameters, capacitance change of the capacitor is caused by measured change, and the capacitance change can be converted into an electric signal to be output through a measuring circuit. The working principle of the resistance strain type vibration sensor is that a strain gauge is pasted on a test piece, the length of the strain gauge is changed due to the stress deformation of the test piece, and therefore the resistance value of the strain gauge is changed.
It is understood that the noise collection device 102 in the active noise reduction device 101 of the home appliance may be the sensor 201, or the noise collection device 102 may be the microphone 301, or the noise collection device 102 may include the sensor 201 and the microphone 301.
In one embodiment, when the noise collection device 102 in the active noise reduction device 101 of the home appliance is the sensor 201, as shown in fig. 2, it is a structural block diagram of the active noise reduction device of the home appliance in which the noise collection device is the sensor in the embodiment of the present application, and the active noise reduction device 101 of the home appliance includes: noise collection system 102, digital signal processing chip 103, power amplifier 104 and piezoceramics piece 105, wherein, noise collection system 102 is sensor 201, and digital signal processing chip 103 includes: a first analog-to-digital converter 202, a digital-to-analog converter 205, an adaptive filter 203 and a control module 204; the sensor 201 is installed on a vibration part of the household appliance, the first analog-to-digital converter 202 is used for being electrically connected with the sensor 201, and the first analog-to-digital converter 202, the adaptive filter 203, the control module 204, the digital-to-analog converter 205, the power amplifier 104 and the piezoelectric ceramic piece 105 are electrically connected in sequence; when the household appliance equipment works, the vibration part starts to vibrate, a sensor 201 arranged on the vibration part acquires a vibration signal of the vibration part and converts the vibration signal into a first analog electric signal, the sensor 201 sends the first analog electric signal to a first analog-to-digital converter 202, the first analog-to-digital converter 202 converts the first analog electric signal into a first digital signal and sends the first digital signal to an adaptive filter 203, the adaptive filter 203 performs filtering processing on the first digital signal to obtain a target digital signal and sends the target digital signal to a control module 204, the control module 204 determines a control digital signal and sends the control digital signal to a digital-to-analog converter 205, the digital-to-analog converter 205 converts the control digital signal into a control signal and sends the control signal to a power amplifier 104, the power amplifier 104 amplifies the control signal to obtain an amplified control signal and sends the amplified control signal to a piezoelectric ceramic piece 105, the amplified control signal drives the piezoelectric ceramic piece 105 to vibrate, the vibration of the piezoelectric ceramic piece 105 is vibration with the same amplitude, the same frequency and the opposite phase with the vibration of the vibration part, and the piezoelectric ceramic piece 105 is installed at the position with the strongest vibration on the vibration part, so that the vibration of the piezoelectric ceramic piece 105 can be offset with the vibration of the vibration part, the effect of inhibiting the vibration of the vibration part is achieved, the noise generated by the vibration of the vibration part is eliminated, and the purpose of actively reducing the noise is finally achieved.
In one embodiment, when the noise collection device 102 in the active noise reduction device 101 of the home appliance is a microphone 301, as shown in fig. 3, the active noise reduction device 101 of the home appliance is a structural block diagram of the active noise reduction device of the home appliance in which the noise collection device is a microphone in the embodiment of the present application, and the active noise reduction device 101 of the home appliance includes: noise collection system 102, digital signal processing chip 103, power amplifier 104 and piezoceramics piece 105, wherein, noise collection system 102 is microphone 301, and digital signal processing chip 103 includes: a second analog-to-digital converter 302, a digital-to-analog converter 205, an adaptive filter 203 and a control module 204; the specific installation mode of the microphone 301 is that the noise signal collecting part of the microphone 301 faces the vibration component, and the distance between the two parts is within the preset distance range, so that the effect of the microphone 301 for collecting the noise signal of the vibration component is best, and no shielding exists in the noise signal collecting direction of the microphone 301; the second analog-to-digital converter 302 is used for being electrically connected with the microphone 301, and the second analog-to-digital converter 302, the adaptive filter 203, the control module 204, the digital-to-analog converter 205, the power amplifier 104 and the piezoelectric ceramic piece 105 are electrically connected in sequence; when the household appliance works, the vibration part starts to vibrate, the microphone 301 starts to collect a noise signal generated by the vibration of the vibration part and converts the noise signal into a second analog electrical signal to be sent to the second analog-to-digital converter 302, the second analog-to-digital converter 302 converts the second analog electrical signal into a second digital signal and sends the second digital signal to the adaptive filter 203, the adaptive filter 203 performs filtering processing on the second digital signal to obtain a target digital signal and sends the target digital signal to the control module 204, the control module 204 determines a control digital signal and sends the control digital signal to the digital-to-analog converter 205, the digital-to-analog converter 205 converts the control digital signal into a control signal and sends the control signal to the power amplifier 104, the power amplifier 104 amplifies the control signal to obtain an amplified control signal and sends the amplified control signal to the piezoelectric ceramic plate 105, the amplified control signal drives the piezoelectric ceramic piece 105 to vibrate, the vibration of the piezoelectric ceramic piece 105 is vibration with the same amplitude, the same frequency and the opposite phase with the vibration of the vibration part, and the piezoelectric ceramic piece 105 is installed at the position with the strongest vibration on the vibration part, so that the vibration of the piezoelectric ceramic piece 105 can be offset with the vibration of the vibration part, the effect of inhibiting the vibration of the vibration part is achieved, the noise generated by the vibration of the vibration part is eliminated, and the purpose of actively reducing the noise is finally achieved.
In one embodiment, when the noise collection device 102 in the active noise reduction device 101 of the home appliance includes a sensor 201 and a microphone 301, as shown in fig. 4, which is a block diagram of the active noise reduction device of the home appliance in which the noise collection device is a sensor and a microphone in the embodiment of the present application, the active noise reduction device 101 of the home appliance includes: noise collection system 102, digital signal processing chip 103, power amplifier 104 and piezoceramics piece 105, wherein, noise collection system 102 includes sensor 201 and microphone 301, and digital signal processing chip 103 includes: a first analog-to-digital converter 202, a second analog-to-digital converter 302, a digital-to-analog converter 205, an adaptive filter 203 and a control module 204; the sensor 201 is installed on a vibration component of the household appliance, and the first analog-to-digital converter 202 is used for being electrically connected with the sensor 201; the specific installation mode of the microphone 301 is that the noise signal collecting part of the microphone 301 faces the vibration component, and the distance between the two parts is within the preset distance range, so that the effect of the microphone 301 for collecting the noise signal of the vibration component is best, and no shielding exists in the noise signal collecting direction of the microphone 301; the second analog-to-digital converter 302 is used for being electrically connected with the microphone 301; the first analog-to-digital converter 202 and the second analog-to-digital converter 302 are electrically connected with the adaptive filter 203; the adaptive filter 203, the control module 204, the digital-to-analog converter 205, the power amplifier 104 and the piezoelectric ceramic piece 105 are electrically connected in sequence; when the household appliance works, the vibration component starts to vibrate, a sensor 201 installed on the vibration component collects vibration signals of the vibration component and converts the vibration signals into first analog electric signals, the sensor 201 sends the first analog electric signals to a first analog-to-digital converter 202, the first analog-to-digital converter 202 converts the first analog electric signals into first digital signals and sends the first digital signals to an adaptive filter 203, a microphone 301 starts to collect noise signals generated by vibration of the vibration component and converts the noise signals into second analog electric signals and sends the second analog electric signals to a second analog-to-digital converter 302, the second analog-to-digital converter 302 converts the second analog electric signals into second digital signals and sends the second digital signals to the adaptive filter 203, the adaptive filter 203 carries out filtering processing on the received first digital signals and the received second digital signals to obtain target digital signals, the adaptive filter 203 sends the target digital signal to the control module 204, the control module 204 determines a control digital signal and sends the control digital signal to the digital-to-analog converter 205, the digital-to-analog converter 205 converts the control digital signal into a control signal and sends the control signal to the power amplifier 104, the power amplifier 104 amplifies the control signal to obtain an amplified control signal and sends the amplified control signal to the piezoelectric ceramic piece 105, the amplified control signal drives the piezoelectric ceramic piece 105 to vibrate, the vibration of the piezoelectric ceramic piece 105 is vibration with the same amplitude, the same frequency and the opposite phase as the vibration of the vibration part, the piezoelectric ceramic piece 105 is arranged at the position of the vibration part with the strongest vibration, therefore, the vibration of the piezoelectric ceramic piece 105 can be offset with the vibration of the vibration part, the effect of inhibiting the vibration of the vibration part is achieved, and the noise generated by the vibration of the vibration part is eliminated, finally, the purpose of active noise reduction is realized.
Referring to fig. 5, another structural block diagram of the active noise reduction apparatus of a home appliance based on the structural block diagram shown in fig. 1 in the embodiment of the present application is shown, in the embodiment of the present application, the active noise reduction apparatus 101 of a home appliance further includes: and the power supply module 501, wherein the power supply module 501 is electrically connected with the digital signal processing chip 103.
In this embodiment of the present application, an active noise reduction apparatus 101 of a home appliance further includes: the power module 501, the power module 501 is electrically connected with the digital signal processing chip 103, and stable electric energy can be provided for the active noise reduction device 101 of the household appliance through setting the power module 501.
Referring to fig. 6, another structural block diagram of the active noise reduction apparatus of a home appliance based on the structural block diagram shown in fig. 5 in the embodiment of the present application is shown, in the embodiment of the present application, the active noise reduction apparatus 101 of a home appliance further includes: the display screen module 601 and the display lamp module 602, the display screen module 601 is electrically connected with the digital signal processing chip 103; the display lamp module 602 is electrically connected to the digital signal processing chip 103.
In the embodiment of the present application, the display screen module 601 is an LED display screen or an OLED display screen.
In the embodiment of the present application, the display lamp module 602 includes a preset number of LED lamps.
In this embodiment of the present application, an active noise reduction apparatus 101 of a home appliance further includes: the display screen module 601 and the display lamp module 602, the display screen module 601 is electrically connected with the digital signal processing chip 103, and the display lamp module 602 is electrically connected with the digital signal processing chip 103. The working state of the active noise reduction device 101 of the household appliance and the active noise reduction effect can be intuitively displayed to a user by arranging the display screen module 601 and the display lamp module 602 on the active noise reduction device 101 of the household appliance.
The embodiment of the application provides a household appliance, which comprises an active noise reduction device of the household appliance in any one embodiment of fig. 1 to 6.
In the embodiment of the application, the household appliance comprises an active noise reduction device 101 of the household appliance, when the household appliance works, vibration of a piezoelectric ceramic piece 105 in the active noise reduction device 101 of the household appliance is vibration with the same amplitude, the same frequency and the opposite phase with vibration of a vibration part of the household appliance, and the piezoelectric ceramic piece 105 is installed at the position with the strongest vibration on the vibration part of the household appliance, so that the vibration of the piezoelectric ceramic piece 105 can be offset with the vibration of the vibration part of the household appliance, the effect of inhibiting the vibration of the vibration part of the household appliance is achieved, noise generated by the vibration of the vibration part of the household appliance is eliminated, and the purpose of actively reducing noise of the household appliance is finally achieved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An active noise reduction device of a household appliance, the active noise reduction device comprising: noise collection system, digital signal processing chip, power amplifier and piezoceramics piece, wherein:
the noise acquisition device is arranged on a vibration component of the household appliance;
the noise acquisition device and the power amplifier are respectively and electrically connected with the digital signal processing chip;
the power amplifier is electrically connected with the piezoelectric ceramic piece;
the piezoelectric ceramic plate is arranged on the vibration component.
2. The active noise reduction device of a home appliance according to claim 1, wherein the noise collection device comprises: a sensor and/or microphone;
the sensor and/or the microphone are/is electrically connected with the digital signal processing chip.
3. The active noise reduction device of a home appliance according to claim 2, wherein the digital signal processing chip comprises: the device comprises a first analog-to-digital converter, a digital-to-analog converter, a self-adaptive filter and a control module;
the first analog-to-digital converter, the adaptive filter, the control module, the digital-to-analog converter and the power amplifier are electrically connected in sequence;
the first analog-to-digital converter is used for being electrically connected with the sensor.
4. The active noise reduction device of a home appliance according to claim 3, wherein the digital signal processing chip further comprises a second analog-to-digital converter;
the second analog-to-digital converter is electrically connected with the adaptive filter;
the second analog-to-digital converter is electrically connected with the microphone.
5. The active noise reduction device of a home appliance according to claim 2, wherein the sensor is: a piezoelectric vibration sensor, an eddy current vibration sensor, an inductive vibration sensor, a capacitive vibration sensor, or a resistive strain gauge vibration sensor.
6. The active noise reduction device of a home appliance according to claim 1, further comprising: a power supply module;
the power module is electrically connected with the digital signal processing chip.
7. The active noise reduction device of a home appliance according to claim 1, further comprising: the display screen module and the display lamp module;
the display screen module is electrically connected with the digital signal processing chip;
the display lamp module is electrically connected with the digital signal processing chip.
8. The active noise reduction device of a household electrical appliance according to claim 7, wherein the display screen module is an LED display screen or an OLED display screen.
9. The active noise reduction device of a household electrical appliance according to claim 7, wherein the display lamp module comprises a preset number of LED lamps.
10. A home device, characterized in that it comprises an active noise reduction means of a home device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022322867.2U CN214012497U (en) | 2020-10-19 | 2020-10-19 | Active noise reduction device of household appliance and household appliance |
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| CN202022322867.2U CN214012497U (en) | 2020-10-19 | 2020-10-19 | Active noise reduction device of household appliance and household appliance |
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