CN110913311A - Chair cushion and chair are competed to electricity - Google Patents
Chair cushion and chair are competed to electricity Download PDFInfo
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- CN110913311A CN110913311A CN201910435167.3A CN201910435167A CN110913311A CN 110913311 A CN110913311 A CN 110913311A CN 201910435167 A CN201910435167 A CN 201910435167A CN 110913311 A CN110913311 A CN 110913311A
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- 230000005611 electricity Effects 0.000 title claims abstract description 5
- 230000005236 sound signal Effects 0.000 claims abstract description 57
- 230000003321 amplification Effects 0.000 claims abstract description 34
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims description 57
- 238000001914 filtration Methods 0.000 claims description 29
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 230000002860 competitive effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000033764 rhythmic process Effects 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010752 BS 2869 Class D Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010043268 Tension Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/62—Accessories for chairs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Amplifiers (AREA)
Abstract
A chair and its chair cushion are competed in electricity, the chair competed in electricity includes the chair cushion body and locates the audio frequency processing circuit in the said chair cushion body, the audio frequency processing circuit is through inputting the audio signal and having signal amplification circuit between the filter circuit, can guarantee the undistorted of the audio signal, can also go away and drop the direct-flow signal at the same time, namely strengthen the audio signal and can isolate the direct-flow signal of the outside and prevent the high voltage from damaging the external equipment; in addition, the chair cushion can synchronously vibrate along with the input audio signal, so that when a player plays games, the real-time internal sound effect can be fed back to an experiencer through the vibration in the chair cushion, and the experience is more real; meanwhile, for music enthusiasts, when the music is relaxed by leaning on the chair, the body can feel the rhythm of the music, so that the body and mind can be relaxed in an all-around way.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to a chair cushion and a chair for a computer race.
Background
Under the rapid development of society, people are brought with fast-paced life and great pressure on life, and various relaxation modes follow the fast-paced life and the great pressure on life. However, most people relax by choosing to play games or listen to music while lying in a comfortable chair. For some game enthusiasts, the nervous tension of work can be relieved if they are put into a game all over during the rest period of the work.
At present, the traditional electronic competition chair is mainly designed according to human engineering in terms of structure, so that the experiencers have muscle spines and the like to be relaxed when sitting and leaning normally, some electronic competition chairs only have loudspeaker added, and have no other functions on body feeling; in addition, the vibration mode of the traditional electronic contest chair cushion adopts: the spring-supported chair is characterized in that an iron block is arranged at the lower part of the chair, after the acquired audio signal is amplified, the strength of a magnetic field is changed by the changed current, so that a physical examiner feels synchronous vibration rhythm, but the mode is complex to manufacture and higher in manufacturing and production cost; in addition, some of them need to use a CPU (Central Processing Unit) to cooperate with a large amount of peripheral power amplifiers and motor driving circuits to drive a single motor, so as to realize synchronous vibration with audio signals, the logic is also complex, the number of used components is relatively large, and meanwhile, because only a single position is used for synchronization of vibration, the experience feeling of the whole body is poor for the experiencer, the vibration experience effect of all-around distribution cannot be achieved, and the production cost is also relatively high.
Disclosure of Invention
The invention aims to provide a chair cushion of a power competition chair and the power competition chair, and aims to solve the problems of single function, complex driving circuit and high cost of the traditional power competition chair.
A first aspect of an embodiment of the present invention provides a chair cushion for a sports competition chair, including a chair cushion body and an audio processing circuit disposed in the chair cushion body, where the audio processing circuit includes:
the input end of the signal amplification unit is used for accessing an audio signal, and the signal amplification unit is used for isolating and amplifying a direct current signal of the audio signal and outputting the amplified audio signal at the output end;
the input end of the filtering unit is connected with the output end of the signal amplification unit, and the filtering unit is used for filtering out signals outside a preset frequency range of the amplified audio signals to obtain target audio signals and outputting the target audio signals at the output end;
the input end of the power amplification unit is connected with the filtering unit, and the power amplification unit is used for carrying out power amplification on the target audio signal and outputting the target audio signal after power amplification at the output end; and
the input end of the vibrator is connected with the output end of the power amplifier unit, and the vibrator receives a target audio signal amplified by the power output by the amplifier and then synchronously works with the target audio signal, so that the vibration generated when the vibrator works is conducted to the chair cushion body.
In one embodiment, the signal amplification unit is specifically configured to filter a dc signal from the accessed audio signal and then amplify and output the filtered dc signal.
In one embodiment, the signal amplifying unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first coupling capacitor, a second coupling capacitor, and a first transistor, where:
the first end of the first resistor is used as the input end of the signal amplification unit, the first end of the first coupling capacitor is connected with the second end of the first resistor, the first end of the second resistor is connected with a working power supply, the second end of the second resistor is connected with the first end of the third resistor, the second end of the first coupling capacitor and the base electrode of the triode, the second end of the third resistor is grounded, the collector of the triode is connected with the working power supply, the emitter of the triode is connected with the first end of the fourth resistor and the first end of the second coupling capacitor, the second end of the fourth resistor is grounded, the first end of the fifth resistor is connected with the second end of the second coupling capacitor, and the second end of the fifth resistor is grounded, and the second end of the second coupling capacitor is used as the output end of the signal amplification unit.
In one embodiment, the filtering unit includes a first-order high-pass filter and a third-order active low-pass filter, an input end of the first-order high-pass filter is used as an input end of the filtering unit, an input end of the third-order active low-pass filter is connected with an output end of the first-order high-pass filter, and an output end of the third-order active low-pass filter is used as an output end of the filtering unit.
In one embodiment, the first-order high-pass filter includes a first filter capacitor and a sixth resistor, a first end of the first filter capacitor is used as an input end of the first-order high-pass filter, a first end of the sixth resistor is connected with a second end of the first filter capacitor, and a second end of the sixth resistor is used as an output end of the first-order high-pass filter.
In one embodiment, the third order active low pass filter comprises a butterworth type filter.
In one embodiment, the third-order active low pass filter includes a first operational amplifier, a second operational amplifier, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor, where:
the inverting input terminal of the first operational amplifier is used as the input terminal of the third-order active low-pass filter, the non-inverting input terminal of the first operational amplifier is connected with the non-inverting input terminal of the second operational amplifier, the seventh resistor is connected in series between the inverting input terminal and the output terminal of the first operational amplifier, the first capacitor is connected in parallel with the seventh resistor, the eighth resistor, the ninth resistor and the tenth resistor are sequentially connected in series between the output terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, and are connected between the common junction of the eighth resistor and the ninth resistor and the ground, the third capacitor is connected between the common junction of the ninth resistor and the tenth resistor and the non-inverting input terminal of the second operational amplifier, and the eleventh resistor is connected between the common junction of the ninth resistor and the tenth resistor and the output terminal of the second operational amplifier, the fourth capacitor is connected between the inverting input end and the output end of the second operational amplifier, the power supply terminal of the second operational amplifier is connected with the power supply, and the output of the second operational amplifier is used as the output end of the third-order active low-pass filter.
In one embodiment, the power amplifier unit includes a class D amplifier.
In one embodiment, the audio processing circuit further includes a circuit module, and the circuit module is provided with two power outputs, one of the power outputs is used for supplying power to the signal amplification unit and the filtering unit, and the other power output is used for supplying power to the power efficiency unit.
A second aspect of an embodiment of the present invention provides a competitive chair comprising the competitive chair cushion described above.
The electronic contest chair cushion is provided with the signal amplifying circuit between the input audio signal and the filter circuit, so that the audio signal can be ensured not to be distorted, and meanwhile, the direct current signal can be removed, namely, the audio signal is enhanced, and the external direct current signal can be isolated to prevent high voltage from damaging external equipment; in addition, the chair cushion can synchronously vibrate along with the input audio signal, so that when a player plays games, the real-time internal sound effect can be fed back to an experiencer through the vibration in the chair cushion, and the experience is more real; meanwhile, for music enthusiasts, when the music is relaxed by leaning on the chair, the body can feel the rhythm of the music, so that the body and mind can be relaxed in an all-around way.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a block diagram of an audio processing circuit in a chair cushion of a power racing chair according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary circuit for a signal amplification unit in the audio processing circuit shown in FIG. 1;
fig. 3 is an exemplary circuit schematic of a filtering unit in the audio processing circuit shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the electronic contest chair cushion provided by the embodiment of the present invention includes a chair cushion body, an audio processing circuit arranged in the chair cushion body, an audio processing circuit signal amplifying unit 10, a filtering unit 20, a power amplifying unit 30 and a vibrator 40.
The input end of the signal amplification unit 10 is used for accessing an audio signal, the signal amplification unit 10 is configured to isolate and amplify a direct current signal for the audio signal, and the output end of the signal amplification unit 10 outputs the amplified audio signal; the input end of the filtering unit 20 is connected to the output end of the signal amplifying unit 10, the filtering unit 20 is configured to filter signals outside a preset frequency range of the amplified audio signal to obtain a target audio signal, and the filtering unit 20 outputs the target audio signal at the output end; the input end of the power amplification unit 30 is connected with the filtering unit 20, the power amplification unit 30 is configured to perform power amplification on the target audio signal, and the power amplification unit 30 outputs the power-amplified target audio signal at the output end; the input end of the vibrator 40 is connected to the output end of the power amplifier unit 30, and the vibrator 40 receives the target audio signal amplified by the power output from the amplifier and then works synchronously with the target audio signal, so that the vibration generated when the vibrator 40 works is transmitted to the chair cushion body.
It is understood that the audio analog signal may be input through a microphone, or an AUX interface, or a wireless receiver (e.g., bluetooth, WIFI, etc.), or other interfaces. The signal (current) amplifying unit is specifically used for filtering out the direct current signal and amplifying and outputting the accessed audio signal. Since the power level of the accessed audio signal is generally low, if the audio signal directly passes through the filter circuit, serious signal distortion and attenuation occur, and the components of the whole circuit system can pick up current from the signal, so that the acquired signal is influenced. If audio signal both can ensure audio signal's undistorted through the triode and plus the amplifier circuit that high level constitutes, go through coupling capacitor to locate the direct current signal simultaneously, strengthen audio signal promptly and also can keep apart the direct current signal of outside and prevent that high voltage from damaging external equipment. The audio processing circuit can amplify the power of the useful audio signal and effectively eliminate the noise on the audio signal, enhance the loading capacity of the system, and can better drive the rear-stage vibrator 40 (hammer) to start vibration and the vibration point to be synchronous with the input audio signal.
It will be appreciated that the competitive chair cushion also includes a circuit module 50. In this embodiment, the circuit module 50 uses a single power supply, so that the power supply system of the power amplifier circuit is reliable. The circuit module 50 has two outputs, one of which is output through a low dropout regulator (LDO) for supplying power to the signal amplification unit 10 and the filter unit 20, and the other of which is output for supplying power to the power amplification unit 30. As long as the power supply of the circuit module 50 is insufficient, the LDO and power amplifier unit 30 does not work, and the circuit of the whole electronic contest chair cushion stops the output work. Moreover, the circuit adopts an integrated circuit and a surface mounting technology, and is produced in a standardized way, so that the fault rate of the product in batches is extremely low.
Referring to fig. 2, in one embodiment, the signal amplifying unit 10 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R6, a fifth resistor R5, a first coupling capacitor C11, a second coupling capacitor C12, and a first transistor Q1, a first end of the first resistor R1 is used as an input terminal of the signal amplifying unit 10, a first end of the first coupling capacitor C11 is connected to a second end of the first resistor R1, a first end of the second resistor R2 is connected to a working power source, a second end of the second resistor R2 is connected to a first end of the third resistor R3, a second end of the first coupling capacitor C11, and a base of the transistor, a second end of the third resistor R3 is grounded, a collector of the transistor is connected to the working power source, an emitter of the transistor is connected to a first end of the fourth resistor R6 and a first end of the second coupling capacitor C12, a second end of the fourth resistor R6 is grounded, a second end of the fifth resistor R5 is connected to a second end of the coupling capacitor 12, the second terminal of the fifth resistor R5 is grounded, and the second terminal of the second coupling capacitor C12 serves as the output terminal of the signal amplifying unit 10. The first coupling capacitor C11 and the second coupling capacitor C12 are polar capacitors, the second terminal of the first coupling capacitor C11 is positive, and the first terminal of the second coupling capacitor C12 is positive. The first transistor Q1 is an NPN transistor.
Referring to fig. 3, the filtering unit 20 includes a first-order high-pass filter 21 and a third-order active low-pass filter 22, an input end of the first-order high-pass filter 21 is used as an input end of the filtering unit 20, an input end of the third-order active low-pass filter 22 is connected to an output end of the first-order high-pass filter 21, and an output end of the third-order active low-pass filter 22 is used as an output end of the filtering unit 20. The input audio signal passes through the signal amplifying unit 10, and then passes through the filter composed of the first-order high-pass filtering and the third-order active low-pass filtering, and the clean audio signal is output to the vibrator 40 which is driven synchronously through the power amplifier unit 30. In the filtering unit 20, an active filtering circuit mainly composed of a resistance-capacitance element and an operational amplifier is adopted, wherein the low-pass filter mainly adopts a butterworth type filter, the signal in the pass band is flat, new noise cannot be generated by the filtered audio signal, the signal in a certain frequency range can be controlled to pass through, interference signals outside the frequency range can be attenuated, the reliability of the circuit is high, and the impedance of other circuit systems cannot be influenced.
In one embodiment, the first-order high-pass filter 21 includes a first filter capacitor C13 and a sixth resistor R6, a first terminal of the first filter capacitor C13 is used as an input terminal of the first-order high-pass filter 21, a first terminal of the sixth resistor R6 is connected to a second terminal of the first filter capacitor C13, and a second terminal of the sixth resistor R6 is used as an output terminal of the first-order high-pass filter 21.
In one embodiment, the third-order active low-pass filter 22 includes a first operational amplifier U1, a second operational amplifier U2, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4, an inverting input terminal of the first operational amplifier U1 is used as an input terminal of the third-order active low-pass filter 22, a non-inverting input terminal of the first operational amplifier U1 is connected to a non-inverting input terminal of the second operational amplifier U2 and to a 4.5V output voltage of the follower, and is compared with the filtered signal, so as to reduce the swing amplitude range of the filtered signal to be consistent with that of the original input signal, the seventh resistor R7 is connected between the inverting input terminal and the output terminal of the first operational amplifier U1, the first capacitor C1 is connected in parallel with the seventh resistor R7, and the eighth resistor R8 is connected in series, The ninth resistor R9 and the tenth resistor R10 are sequentially connected in series between the output end of the first operational amplifier U1 and the inverting input end of the second operational amplifier U2, between the common node of the eighth resistor R8 and the ninth resistor R9 and the ground, the third capacitor C3 is connected between the common node of the ninth resistor R9 and the tenth resistor R10 and the non-inverting input end of the second operational amplifier U2, the eleventh resistor R11 is connected between the common node of the ninth resistor R9 and the tenth resistor R10 and the output end of the second operational amplifier U2, the fourth capacitor C4 is connected between the inverting input end and the output end of the second operational amplifier U2, the power supply terminal of the second operational amplifier U2 is connected with the power supply V +, V-, and the output of the second operational amplifier U2 is used as the output end of the third-order active low pass filter 22.
In one embodiment, the power amplifier unit 30 includes a class D amplifier. Class D amplifiers are based on switching transistors that are fully on or off in very short periods of time, with little heat and very high efficiency (around 90%). In the class-D amplifier, the output of the comparator is connected to a power amplifier circuit, the power amplifier circuit uses a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) to replace a BJT (Bipolar Junction Transistor), and the former has a faster response time, so that the class-D amplifier is suitable for a high-frequency operating mode. Has the characteristics of high efficiency and low noise.
In addition, the chair cushion body can also be provided with an audio playing circuit which is connected with the signal amplifying circuit and comprises a power amplifier, a loudspeaker and the like, and the audio playing circuit is used for converting audio signals into sound to be played.
A second aspect of the embodiment of the present invention provides a competitive chair, which includes the above competitive chair cushion.
The electric competition chair cushion is provided with the current amplifying circuit and the filter circuit, the enhanced input audio signal is filtered by the filter formed by the first-order high-pass circuit and the third-order low-pass circuit, the amplified driving signal can be screened, the signal beyond the designed frequency range can be attenuated rapidly, new noise can not be generated, the high fidelity of the audio signal is improved, and finally, the synchronous vibration of a hammer and the audio signal is carried out through the power amplifier circuit; the device has simple structure, small volume and low cost; the equipment is used for the electronic contest chair, can let the game player experience with the sound effect in the recreation scene the same impression, more can use in some VR supporting games. Meanwhile, some music enthusiasts can enjoy music relaxation and can also fully relax the body in rhythmic synchronous vibration feeling.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a chair cushion is competed to electricity, includes the chair cushion body and locates audio processing circuit in the chair cushion body, its characterized in that, audio processing circuit includes:
the input end of the signal amplification unit is used for accessing an audio signal, and the signal amplification unit is used for isolating and amplifying a direct current signal of the audio signal and outputting the amplified audio signal at the output end;
the input end of the filtering unit is connected with the output end of the signal amplification unit, and the filtering unit is used for filtering out signals outside the preset frequency range of the amplified audio signals to obtain target audio signals and outputting the target audio signals at the output end;
the input end of the power amplification unit is connected with the filtering unit, and the power amplification unit is used for carrying out power amplification on the target audio signal and outputting the target audio signal after power amplification at the output end; and
the input end of the vibrator is connected with the output end of the power amplifier unit, and the vibrator receives a target audio signal amplified by the power output by the amplifier and then synchronously works with the target audio signal, so that the vibration generated when the vibrator works is conducted to the chair cushion body.
2. The electronic contest chair cushion of claim 1, wherein the signal amplification unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first coupling capacitor, a second coupling capacitor, and a first triode, wherein:
the first end of the first resistor is used as the input end of the signal amplification unit, the first end of the first coupling capacitor is connected with the second end of the first resistor, the first end of the second resistor is connected with a working power supply, the second end of the second resistor is connected with the first end of the third resistor, the second end of the first coupling capacitor and the base electrode of the triode, the second end of the third resistor is grounded, the collector of the triode is connected with the working power supply, the emitter of the triode is connected with the first end of the fourth resistor and the first end of the second coupling capacitor, the second end of the fourth resistor is grounded, the first end of the fifth resistor is connected with the second end of the second coupling capacitor, and the second end of the fifth resistor is grounded, and the second end of the second coupling capacitor is used as the output end of the signal amplification unit.
3. The chair cushion for electric races as claimed in claim 1, wherein the filtering unit comprises a first order high pass filter and a third order active low pass filter, an input terminal of the first order high pass filter being an input terminal of the filtering unit, an input terminal of the third order active low pass filter being connected to an output terminal of the first order high pass filter, an output terminal of the third order active low pass filter being an output terminal of the filtering unit.
4. The electronic racing chair cushion of claim 3, wherein the first-order high-pass filter comprises a first filter capacitor and a sixth resistor, a first end of the first filter capacitor is used as an input end of the first-order high-pass filter, a first end of the sixth resistor is connected with a second end of the first filter capacitor, and a second end of the sixth resistor is used as an output end of the first-order high-pass filter.
5. The competitive chair cushion of claim 3, wherein the third order active low pass filter comprises a Butterworth-type filter.
6. The electronic contest chair cushion of claim 3, wherein the third order active low pass filter includes a first operational amplifier, a second operational amplifier, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor, wherein:
the inverting input terminal of the first operational amplifier is used as the input terminal of the third-order active low-pass filter, the non-inverting input terminal of the first operational amplifier is connected with the non-inverting input terminal of the second operational amplifier, the seventh resistor is connected in series between the inverting input terminal and the output terminal of the first operational amplifier, the first capacitor is connected in parallel with the seventh resistor, the eighth resistor, the ninth resistor and the tenth resistor are sequentially connected in series between the output terminal of the first operational amplifier and the inverting input terminal of the second operational amplifier, and are connected between the common junction of the eighth resistor and the ninth resistor and the ground, the third capacitor is connected between the common junction of the ninth resistor and the tenth resistor and the non-inverting input terminal of the second operational amplifier, and the eleventh resistor is connected between the common junction of the ninth resistor and the tenth resistor and the output terminal of the second operational amplifier, the fourth capacitor is connected between the inverting input end and the output end of the second operational amplifier, the power supply terminal of the second operational amplifier is connected with the power supply, and the output of the second operational amplifier is used as the output end of the third-order active low-pass filter.
7. The chair cushion for electric racing chair of claim 1, wherein the power amplifier unit comprises a class D amplifier.
8. The chair cushion for electronic competitions as claimed in claim 1, wherein said audio processing circuit further comprises a circuit module, said circuit module having two outputs, one of said outputs for supplying power to said signal amplification unit and said filter unit, and the other output for supplying power to said power amplification unit.
9. A competitive chair comprising the chair cushion of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910435167.3A CN110913311A (en) | 2019-05-23 | 2019-05-23 | Chair cushion and chair are competed to electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910435167.3A CN110913311A (en) | 2019-05-23 | 2019-05-23 | Chair cushion and chair are competed to electricity |
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| Publication Number | Publication Date |
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| CN110913311A true CN110913311A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910435167.3A Pending CN110913311A (en) | 2019-05-23 | 2019-05-23 | Chair cushion and chair are competed to electricity |
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| CN (1) | CN110913311A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111773659A (en) * | 2020-06-16 | 2020-10-16 | 武狄实业(上海)有限公司 | System and method for adjusting sound-sensing vibration of electronic contest chair game |
| CN113616007A (en) * | 2021-08-09 | 2021-11-09 | 浙江昊国家具有限公司 | Intelligent linkage animation electronic contest seat that numerical control was made |
| CN116566338A (en) * | 2023-04-27 | 2023-08-08 | 先歌国际影音股份有限公司 | Audio amplifying circuit |
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| CN113616007A (en) * | 2021-08-09 | 2021-11-09 | 浙江昊国家具有限公司 | Intelligent linkage animation electronic contest seat that numerical control was made |
| CN116566338A (en) * | 2023-04-27 | 2023-08-08 | 先歌国际影音股份有限公司 | Audio amplifying circuit |
| CN116566338B (en) * | 2023-04-27 | 2024-02-09 | 先歌国际影音股份有限公司 | Audio amplifying circuit |
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