A circuit applied to drive a massage vibrator

Abstract

The utility model provides a kind of circuit applied to drive massage vibrator, it includes core signal source, signal distribution layer, amplitude control layer, signal amplification layer and power drive layer;Wherein, core signal source includes digital-analog converter, signal distribution layer and signal amplification layer all include operational amplifier, amplitude control layer includes control chip, and power drive layer includes power amplifier chip.The utility model effectively reduces circuit volume, reduces production cost, more adapt to the space limit of vehicle-mounted environment.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of control circuits, specifically to a circuit used to drive a massage vibrator. Background Technology

[0002] With the continuous development of the automotive industry, in-vehicle comfort features have become an important direction for improving user experience. Among them, seat massage function has received widespread attention because it can effectively relieve driving fatigue. The realization of seat massage function mainly relies on the precise control of the massage vibrator by the drive circuit. Its performance directly affects the stability and variety of the massage effect and the integration of the circuit.

[0003] To achieve differentiated vibrations (such as different frequencies) from multiple massage oscillators, traditional solutions often use multiple independent signal sources to drive each channel separately. While this approach can meet the requirements for frequency differentiation, it requires multiple independent signal generation circuits, resulting in a large overall circuit size, a surge in hardware costs, and is not conducive to spatial layout in a vehicle environment.

[0004] The vibration intensity of a massage vibrator is determined by the amplitude of the drive signal, and traditional solutions often use analog potentiometers for amplitude adjustment. However, analog potentiometers suffer from mechanical wear, and long-term use can easily lead to parameter drift, causing the vibration intensity to deviate from the preset value. This makes it difficult to meet the long-term stability requirements of vehicle-mounted equipment and affects the consistency of the massage effect.

[0005] In multi-oscillator collaborative operation scenarios, a single signal needs to be distributed through multiple stages before being transmitted to each channel. Because the signal is easily affected by factors such as line impedance and differences in component characteristics during the distribution process, phase shifts and amplitude attenuation often occur, resulting in asynchronous operation of multiple oscillators, poor collaborative effect, and reduced comfort and reliability of the massage function. Utility Model Content

[0006] This utility model mainly provides a circuit for driving a massage vibrator to solve the technical problems mentioned in the background art.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0008] A circuit for driving a massage vibrator includes a core signal source, a signal distribution layer, an amplitude control layer, a signal amplification layer, and a power drive layer; wherein, the core signal source includes a digital-to-analog converter, the signal distribution layer and the signal amplification layer both include operational amplifiers, the amplitude control layer includes a control chip, and the power drive layer includes a power amplifier chip.

[0009] The output of the digital-to-analog converter is connected to the input of the operational amplifier in the signal distribution layer. The output of the operational amplifier in the signal distribution layer is connected to the input of the control chip in the amplitude control layer. The output of the control chip in the amplitude control layer is connected to the input of the operational amplifier in the signal amplification layer. The output of the operational amplifier in the signal amplification layer is connected to the input of the power amplifier chip in the power drive layer. The output of the power amplifier chip in the power drive layer is used to connect to the massage vibrator.

[0010] The core signal source outputs multiple analog voltages through a digital-to-analog converter, and obtains a sine wave output signal by plotting points using a software algorithm; the signal distribution layer uses operational amplifiers to form voltage followers, distributing the source signal to each channel; the amplitude control layer uses a control chip to achieve independent programmable control of the amplitude of each channel, or changes the output voltage amplitude by modifying the data input to the digital-to-analog converter; the signal amplification layer uses operational amplifiers to form voltage amplifiers, amplifying the amplitude signal by a fixed factor; the power drive layer uses a power amplifier chip in conjunction with a 12V automotive power supply to provide driving power to the massage vibrator.

[0011] Furthermore, the core signal source uses a digital-to-analog converter of model DAC124S085CIMM.

[0012] Furthermore, the signal distribution layer and the signal amplification layer employ operational amplifiers of model LM2904DR.

[0013] Furthermore, the amplitude control layer uses a control chip of model MCP41010.

[0014] Furthermore, the power drive layer uses a power amplifier chip with the model number CS8623E.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] Firstly, the core signal source of this utility model controls the digital-to-analog converter through a single SPI bus, outputs multiple analog voltages and generates sine wave signals, eliminating the need for multiple independent signal sources, greatly reducing the redundant design of hardware circuits, effectively reducing circuit size, lowering production costs, and making it more suitable for the space constraints of the vehicle environment.

[0017] Secondly, the signal distribution layer of this utility model uses an operational amplifier to form a voltage follower. By utilizing its high input impedance and low output impedance, the source signal is stably distributed to each channel, which significantly reduces the phase shift and amplitude attenuation caused by the signal being distributed through multiple stages in traditional circuits. This ensures the coordination and consistency of multiple massage oscillators during operation and improves the stability of the massage effect.

[0018] Thirdly, the amplitude control layer of this utility model realizes independent programming control of the amplitude of each channel through the control chip, or changes the output voltage amplitude by modifying the data input to the digital-to-analog converter. Both methods are digital adjustment methods without mechanical wear, avoiding the parameter drift problem caused by mechanical wear of traditional analog potentiometers, ensuring the long-term stability and adjustment accuracy of the vibration intensity of the massage oscillator, and meeting the long-term use requirements of vehicle-mounted equipment.

[0019] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of the core signal source of this utility model;

[0021] Figure 2 This is a schematic diagram of the amplitude control layer of this utility model;

[0022] Figure 3 This is a schematic diagram of the operational amplifier of this utility model;

[0023] Figure 4 This is a connection diagram of the present invention.

[0024] In the diagram: 1. Core signal source; 11. Digital-to-analog converter; 2. Signal distribution layer; 21, 22. Operational amplifier; 3. Amplitude control layer; 31. Control chip; 4. Signal amplification layer; 5. Power drive layer; 51. Power amplifier chip. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] This application provides a circuit for driving a massage vibrator, as shown in the schematic diagram below. Figure 1-4 As shown. The circuit used to drive the massage vibrator includes a core signal source 1, a signal distribution layer 2, an amplitude control layer 3, a signal amplification layer 4, and a power drive layer 5; wherein, the core signal source 1 includes a digital-to-analog converter 11, the signal distribution layer 2 and the signal amplification layer 4 both include operational amplifiers 21 and 22, the amplitude control layer 3 includes a control chip 31, and the power drive layer 5 includes a power amplifier chip 51;

[0029] The output of the digital-to-analog converter 11 is connected to the input of the operational amplifier 22 in the signal distribution layer 2. The output of the operational amplifier 21 in the signal distribution layer 2 is connected to the input of the control chip 31 in the amplitude control layer 3. The output of the control chip 31 in the amplitude control layer 3 is connected to the input of the operational amplifier 21 in the signal amplification layer 4. The output of the operational amplifier 21 in the signal amplification layer 4 is connected to the input of the power amplifier chip 51 in the power drive layer 5. The output of the power amplifier chip 51 in the power drive layer 5 is used to connect to the massage vibrator.

[0030] The core signal source 1 outputs multiple analog voltages through the digital-to-analog converter 11, and obtains a sine wave output signal by plotting points through software algorithm; the signal distribution layer 2 forms a voltage follower through the operational amplifier 22 to distribute the source signal to each channel; the amplitude control layer 3 realizes independent programming control of the amplitude of each channel through the control chip 31, or changes the output voltage amplitude by modifying the data input to the digital-to-analog converter 11; the signal amplification layer 4 forms a voltage amplifier through the operational amplifier 21 to amplify the amplitude signal by a fixed factor; the power drive layer 5 provides driving power to the massage vibrator through the power amplifier chip 51 in conjunction with the automotive 12V power supply.

[0031] It should be noted that, in this embodiment, the circuit solves the problems of large size and high cost of traditional multi-channel drive circuits through a "one source, multiple controls" architecture.

[0032] The core signal source 1 controls the digital-to-analog converter 11 through a single SPI, reducing hardware redundancy and achieving a miniaturized design.

[0033] Signal distribution layer 2 uses operational amplifier 22 to form a voltage follower, which reduces phase shift and amplitude attenuation during signal distribution. Typical attenuation can be controlled within 20%, ensuring the consistency of multi-oscillator cooperative operation.

[0034] The amplitude control layer 3 supports two methods: programming control by the control chip 31 and data adjustment by the digital-to-analog converter 11. This avoids the mechanical wear problem of traditional analog potentiometers and improves the long-term stability of vibration intensity.

[0035] The power amplifier chip 51 of the power drive layer 5, in conjunction with the automotive 12V power supply, outputs a maximum single-channel power of 20W through the output terminal 6, which can meet the needs of different massage intensities. The overall circuit has high integration and strong reliability.

[0036] Optionally, such as Figure 1 and Figure 2 As shown, the core signal source 1 uses a digital-to-analog converter 11 with the model number DAC124S085CIMM.

[0037] In this embodiment, the core signal source 1 adopts a digital-to-analog converter 11 with the model number DAC124S085CIMM. This chip supports multiple analog voltage outputs and achieves high-precision control through the SPI bus. It can stably output sine wave signals, meet the synchronization requirements of multi-channel drive, and its miniaturized package further reduces the circuit volume, making it suitable for the limited space in the vehicle.

[0038] Optionally, such as Figure 1 and Figure 3 As shown, signal distribution layer 2 and signal amplification layer 4 use operational amplifiers 21 and 22 of model LM2904DR.

[0039] In this embodiment, the operational amplifiers 21 and 22 of the signal distribution layer 2 and the operational amplifier 41 of the signal amplification layer 4 use the LM2904DR chip, which has the characteristics of low offset voltage and high common-mode rejection ratio.

[0040] When used as a voltage follower, such as operational amplifier 22, it can effectively isolate the signal source from the load and reduce signal distortion.

[0041] When used as a voltage amplifier, such as operational amplifier 41, it can stably amplify the signal amplitude, ensure the linearity of the output signal, provide a reliable preamplifier signal for subsequent power drive, and improve the overall signal transmission quality of the circuit.

[0042] Optionally, such as Figure 1 and Figure 3 As shown, the amplitude control layer 3 uses a control chip 31 with the model number MCP41010.

[0043] In this embodiment, the amplitude control layer 3 uses a control chip 31 of model MCP41010. This chip supports independent programmable control of amplitude from 0 to 0.6Vpp. It replaces the traditional mechanical potentiometer with digital adjustment, avoiding parameter drift caused by mechanical wear, significantly improving the accuracy and long-term stability of amplitude adjustment, and ensuring the consistency of the vibration intensity of the massage oscillator.

[0044] Optionally, such as Figure 1 As shown, the power drive layer 5 uses a power amplifier chip 51 with the model number CS8623E.

[0045] In this embodiment, the power drive layer 5 uses a power amplifier chip 51 of model CS8623E. This chip is compatible with automotive 12V power supply and the maximum single-channel power output through the output terminal 6 reaches 20W, which can provide sufficient driving power for the massage vibrator to meet the massage intensity requirements in different scenarios. At the same time, it has built-in overcurrent and overheat protection functions, which improves the safety and reliability of the circuit in the complex environment of the vehicle.

[0046] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A circuit for driving a massage vibrator, characterized in that, It includes a core signal source (1), a signal distribution layer (2), an amplitude control layer (3), a signal amplification layer (4), and a power drive layer (5); wherein, the core signal source (1) includes a digital-to-analog converter (11), the signal distribution layer (2) and the signal amplification layer (4) both include operational amplifiers (21, 22), the amplitude control layer (3) includes a control chip (31), and the power drive layer (5) includes a power amplifier chip (51); The output of the digital-to-analog converter (11) is connected to the input of the operational amplifier (22) in the signal distribution layer (2). The output of the operational amplifier (21) in the signal distribution layer (2) is connected to the input of the control chip (31) in the amplitude control layer (3). The output of the control chip (31) in the amplitude control layer (3) is connected to the input of the operational amplifier (21) in the signal amplification layer (4). The output of the operational amplifier (21) in the signal amplification layer (4) is connected to the input of the power amplifier chip (51) in the power drive layer (5). The output of the power amplifier chip (51) in the power drive layer (5) is used to connect to the massage vibrator. The core signal source (1) outputs multiple analog voltages through a digital-to-analog converter (11), and obtains a sine wave output signal by plotting points through a software algorithm; the signal distribution layer (2) forms a voltage follower through an operational amplifier (22) to distribute the source signal to each channel; the amplitude control layer (3) realizes independent programming control of the amplitude of each channel through a control chip (31), or changes the output voltage amplitude by modifying the data input to the digital-to-analog converter (11); the signal amplification layer (4) forms a voltage amplifier through an operational amplifier (21) to amplify the amplitude signal by a fixed factor; the power drive layer (5) provides driving power for the massage vibrator through a power amplifier chip (51) in conjunction with the 12V power supply of a car.

2. The circuit for driving a massage vibrator according to claim 1, characterized in that, The core signal source (1) uses a digital-to-analog converter (11) with the model number DAC124S085CIMM.

3. The circuit for driving a massage vibrator according to claim 1, characterized in that, The signal distribution layer (2) and the signal amplification layer (4) use operational amplifiers (21, 22) of model LM2904DR.

4. The circuit for driving a massage vibrator according to claim 1, characterized in that, The amplitude control layer (3) uses a control chip (31) of model MCP41010.

5. The circuit for driving a massage vibrator according to claim 1, characterized in that, The power drive layer (5) uses a power amplifier chip (51) of model CS8623E.

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