Intelligent sleep assisting pillow adopting DDS technology

Abstract

The invention discloses an intelligent sleep assisting pillow based on a DDS (direct digital frequency synthesis) technology, and belongs to the technical field of sleep assisting. The pillow integrates a DDS chip, an electroencephalogram monitoring module, a multi-mode stimulation output module (including sound, light and vibration stimulation) and an environment sensor, and the functions of personalized frequency adjustment, multi-mode stimulation, intelligent scene setting and the like are achieved. Brain wave frequency signals related to sleep are accurately generated through the DDS technology, stimulation parameters are automatically adjusted in combination with electroencephalogram monitoring feedback and environment data, a user is helped to quickly enter a sleep state, meanwhile, safety threshold setting and low-power-consumption mute design are achieved, and the accuracy, personalization and comfort of sleep assistance are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sleep assistance, and in particular to an intelligent sleep assistance pillow based on direct digital frequency synthesis (DDS) technology, which helps users quickly enter a sleep state through multi-modal stimulation, intelligent adjustment, and the design of safety and comfort. BACKGROUND

[0002] In a fast-paced and high-pressure social environment, sleep disorders are a common problem in today's society, affecting the quality of life and work efficiency of many people. Currently, common sleep assistance methods mainly include drug therapy and ordinary sleep aid devices. Although drug therapy can alleviate insomnia symptoms to some extent, long-term use may have side effects, such as dependence, drug resistance, and other adverse effects on the body. In addition, drug therapy can also cause a series of other adverse effects, such as dizziness, fatigue, and gastrointestinal discomfort, causing many inconveniences to people's daily life. Ordinary sleep aid devices, such as ordinary sleep aid lamps and sleep aid music players, often lack precision and individualization and cannot be adjusted according to the actual sleep state and needs of users, so the sleep aid effect is limited. Brain waves are closely related to sleep state, and different sleep stages correspond to different brain wave frequencies. Regulating brain wave frequency to induce sleep is a highly potential non-drug method. Direct digital frequency synthesis (DDS) technology has high-precision frequency control capability and can generate precise, stable, and flexible adjustable frequency signals, providing the possibility for sleep assistance technology based on brain wave regulation. And using DDS technology to generate brain wave frequency signals that match it, through a specific way to act on the user's brain, guide the user to enter a more deep and comfortable sleep state. Therefore, developing an intelligent sleep assistance pillow based on DDS technology has important practical significance. SUMMARY

[0003] 1. Individualized frequency adjustment

[0004] The present application adopts a high-resolution DDS chip model AD9910, which can adjust the frequency within a wide frequency band of 0.5-13Hz with a precision of 0.1Hz or higher. Through hardware circuit design and software algorithm, precise and stable frequency output is achieved.

[0005] Chip characteristics of this model

[0006] 1GSPS internal clock speed (up to 400MHz analog output)

[0007] Built-in 1GSPS, 14-bit DAC

[0008] Frequency resolution: 0.23Hz or higher

[0009] Phase noise: ≤ -125 dBc / Hz (1 kHz offset, 400 MHz carrier)

[0010] Excellent dynamic performance: > 80 dB narrowband SFDR

[0011] Serial input / output (I / O) control

[0012] Automatic linear or arbitrary frequency / phase / amplitude sweep function

[0013] 8 frequency and phase offset formats

[0014] Sin(x) / X) correction (arcsine filter)

[0015] Powered with 1.8 V and 3.3 V power supply

[0016] Software / hardware controlled power saving function

[0017] 100-pin TQFP EP package

[0018] Integrated 1024 word x 32-bit RAM

[0019] PLL REF CLK multiplier

[0020] Row data path interface

[0021] Single crystal driven internal oscillator

[0022] Phase modulation function

[0023] Amplitude modulation function

[0024] Multi-device synchronization

[0025] Users can select target frequencies according to their own sleep characteristics through the matching APP, and the system automatically adjusts the frequency signal output by the DDS chip.

[0026] Adaptive feedback regulation: combined with electroencephalogram monitoring equipment to obtain user brain wave data in real time, the DDS system automatically adjusts the output frequency using adaptive algorithms according to feedback information. When it is monitored that the user's brain waves gradually approach the sleep state, the system automatically reduces the stimulation frequency or adjusts the frequency combination, so that the brain waves are better transformed to the state conducive to sleep.

[0027] 2. Multi-modal stimulation

[0028] Vibration Assistance: Integrating a miniature linear vibration motor within the sleep assistance pillow, the DDS system generates corresponding vibration driving signals based on brain wave regulation frequencies. By adjusting the driving voltage and pulse width of the vibration motor, the vibration intensity and frequency are controlled, providing gentle tactile stimulation for users and enhancing relaxation effects. For example, while emitting sound stimulation of a specific frequency, the corresponding frequency vibration stimulation is coordinated to help users relax physically and mentally from multiple sensory dimensions.

[0029] Acousto-optic-electric Fusion: In addition to sound stimulation, the DDS technology is combined with light regulation. For example, while emitting sound of a specific frequency, the corresponding frequency flickering light is emitted through the built-in LED light, forming a sound-light-electric multi-modal stimulation to enhance the induction effect on brain waves. Light flickering of different frequencies can interact with the brain's biological clock and visual system, further promoting sleep. The LED light in the sleep assistance pillow cleverly simulates the changing rules of natural light by emitting flickering light of different frequencies.

[0030] 3. Intelligent Scene

[0031] Sleep Scene Presets: Multiple sleep scene modes are preset in the system software, such as the "deep relaxation" mode focusing on α wave frequency stimulation, guiding users to relax by gradually reducing the frequency; the "quick sleep" mode combining θ wave and δ wave frequency alternating stimulation; and the "dream improvement" mode optimizing brain wave stability. Each mode has corresponding frequency combinations, stimulation intensity, and time sequence parameters. Users can choose modes according to their own needs, and the system automatically loads and executes the corresponding parameter configuration. During the entire sleep process, the "dream improvement" mode continuously monitors and feedback adjusts the user's brain waves, like a loyal guardian, always paying attention to the user's sleep state. Once abnormal fluctuations in brain waves are detected, the system will immediately adjust the stimulation parameters to correct the unstable state of brain waves in a timely manner, ensuring that users can always remain in a stable sleep environment and reduce the occurrence of dreams.

[0032] Environmental Perception and Adaptation: Adding environmental sensors to perceive environmental factors such as temperature, humidity, and light in the bedroom. The DDS technology combines environmental data to intelligently adjust the frequency and stimulation intensity, creating the most suitable sleep environment for users. For example, when the environmental temperature is high, the system can appropriately reduce the intensity of sound and vibration to avoid user discomfort. In the pursuit of the ultimate sleep experience, the environmental perception and adaptation technology is like a thoughtful and intelligent sleep butler, customizing the most suitable sleep environment for each user. By adding a series of high-precision environmental sensors in the sleep assistance pillow, we can accurately perceive key environmental factors such as temperature, humidity, and light in the bedroom in real time, providing detailed and accurate data support for subsequent intelligent adjustment.

[0033] 4. Safety and Comfort

[0034] Safety threshold setting: set the hearing safety threshold for sound intensity, such as long-term exposure not exceeding 85dB(A); limit the vibration intensity to the comfortable perception of the human body, set the maximum vibration amplitude and acceleration threshold. Through hardware limiting circuit and software monitoring program, ensure that each stimulation parameter is always within the safe range, avoid harm to the user's hearing, vision and body. In the continuous innovation of sleep aid technology, while bringing users a better sleep experience, safety is always the bottom line that cannot be crossed. In order to comprehensively protect the health and safety of users during the use of the sleep aid pillow, we carefully set strict and scientific safety thresholds for key stimulation parameters such as sound intensity and vibration intensity, and build a double safety protection system through hardware limiting circuit and software monitoring program, to ensure that each stimulation is accurate and safe to the user's body.

[0035] Low power consumption and silent design: choose low-power DDS chips and energy-saving peripheral circuits, such as using dynamic voltage and frequency scaling (DVFS) technology to reduce chip power consumption. Optimize the driving circuit of the vibration motor and the speaker, reduce electromagnetic interference and mechanical noise, further reduce the noise of the device running through sound-absorbing materials and structural optimization, ensure that the user falls asleep in a quiet and comfortable environment. We have successfully achieved low power consumption and silent design of the device. This not only saves energy costs for users and prolongs the service life of the device, but more importantly, it creates a quiet and comfortable sleep environment for users, allowing them to relax in a peaceful atmosphere and enjoy high-quality sleep. We will continue to adhere to the design philosophy of innovation, environmental protection and comfort, and continuously optimize product performance to provide users with better products and services. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 System architecture diagram of the intelligent sleep aid pillow system using DDS technology of the present invention

[0037] Figure 2 System hardware circuit diagram of the intelligent sleep aid pillow system using DDS technology of the present invention

[0038] Figure 3 Software flowchart of the intelligent sleep aid pillow system using DDS technology of the present invention

[0039] Figure 4 Structure diagram of the intelligent sleep aid pillow using DDS technology of the present invention DETAILED DESCRIPTION

[0040] 1. Hardware assembly

[0041] Component preparation: prepare DDS chips, microcontrollers, EEG monitoring modules, audio power amplifiers, vibration motor driving circuits, LED beads, micro linear vibration motors, environmental sensors and other hardware components.

[0042] Circuit connection: According to the designed circuit diagram, connect the DDS chip with the microcontroller to realize the generation and control of frequency signals; connect the EEG monitoring module with the microcontroller for transmitting brain wave data; connect the audio power amplifier with the DDS chip and the speaker to realize sound stimulation; connect the vibration motor driving circuit with the DDS chip and the miniature linear vibration motor to realize vibration stimulation; connect the LED lamp bead with the DDS chip to realize light stimulation; connect the environmental sensor with the microcontroller for transmitting environmental data.

[0043] Integrated installation: Integrate the above hardware components inside the sleep aid pillow to ensure stable and reliable connection between components, while not affecting the comfort and appearance of the pillow.

[0044] 2. Software programming Control system development: Use programming languages such as C, Python, etc. to develop system control software. Implement frequency adjustment algorithm to adjust the output frequency of the DDS chip according to user selection or adaptive feedback; implement adaptive feedback algorithm to automatically adjust stimulation parameters according to EEG monitoring data; implement sleep scene preset logic to load and execute parameter configurations corresponding to different sleep scene modes; implement environmental perception adaptation algorithm to adjust frequency and stimulation intensity according to environmental sensor data.

[0045] APP development: Develop a matching APP to realize user interaction settings with the device. Users can select sleep scene modes, adjust stimulation parameters, and view sleep data through the APP.

[0046] 3. Debugging and optimization

[0047] Laboratory testing: In the laboratory environment, use EEG simulator to simulate brain wave data in different sleep states, and use environmental simulation equipment to simulate different bedroom environmental factors to test the system. Observe the frequency adjustment accuracy, multi-modal stimulation effect, intelligent scene function, and safety and comfort performance of the system.

[0048] Parameter adjustment: According to the test results, adjust hardware parameters and software algorithms. For example, optimize the frequency control word register settings of the DDS chip to improve frequency adjustment accuracy; adjust the gain of the audio power amplifier to optimize sound stimulation effect; optimize the parameters of the vibration motor driving circuit to improve the comfort of vibration stimulation; adjust the parameters of the adaptive feedback algorithm to improve the response speed and accuracy of the system.

[0049] Performance optimization: Through continuous testing and adjustment, optimize system performance to ensure that the system can stably and accurately realize sleep aid functions and improve user sleep quality.

[0050] 4. Pillow internal structure

[0051] The embedded DDS chips 1 are distributed side by side along the length direction of the pillow; the vibration motor driving circuit 2, the micro linear vibration motor 3 and the LED lamp bead 4 are distributed along the front circuit board along the length direction of the pillow; the microcontroller 5 is arranged on the circuit board on the side, and the circuit board also distributes the electroencephalogram monitoring module 6, the audio power amplifier 7, the loudspeaker 8 and the environmental sensor module 9.

[0052] The embedded DDS chips 1 are connected with the microcontroller 5 to realize the generation and control of the frequency signal; the electroencephalogram monitoring module 6 is connected with the microcontroller 5 to transmit the brain wave data; the audio power amplifier 7 is connected with the DDS chip 1 and the loudspeaker 8 to realize the sound stimulation; the vibration motor driving circuit 2 is connected with the DDS chip 1 and the micro linear vibration motor 3 to realize the vibration stimulation; the LED 4 lamp bead is connected with the DDS chip 1 to realize the light stimulation; the environmental sensor 9 is connected with the microcontroller 5 to transmit the environmental data. The hardware components are connected through the circuit in the pillow.

Claims

1. A smart sleep aid pillow using DDS technology, characterized in that, include: The DDS chip module is used to generate accurate, stable and flexibly adjustable frequency signals, covering a frequency range of 0.5-13Hz, and can adjust the frequency with a precision of 0.1Hz or higher. The EEG monitoring module is used to monitor the user's brainwave data in real time and transmit the data to the control system; The multimodal stimulation output module includes an audio power amplifier, LED beads, and a miniature linear vibration motor, used to emit sound, light, and vibration stimulation at specific frequencies; Environmental sensors are used to sense bedroom environmental factors, such as temperature, humidity, and light intensity, and transmit the data to the control system. The control system receives data from the EEG monitoring module and environmental sensors, and automatically adjusts the frequency signal output by the DDS chip and the stimulation parameters of the multimodal stimulation output module according to a preset algorithm to achieve personalized sleep assistance.

2. The intelligent sleep aid pillow according to claim 1, characterized in that, The DDS chip module employs a high-resolution phase accumulator and a frequency control word register, and achieves wide-band, high-precision frequency adjustment through hardware circuit design and software algorithms.

3. The intelligent sleep aid pillow according to claim 1, characterized in that, The EEG monitoring module is integrated inside the pillow and monitors the user's brainwave data in real time through non-invasive electrodes, transmitting the data to the microcontroller module.

4. The intelligent sleep aid pillow according to claim 1, characterized in that, The environmental sensor module includes a temperature sensor, a humidity sensor, and a light sensor, which are used to sense bedroom environmental parameters and transmit the data to the microcontroller module.

5. The intelligent sleep aid pillow according to claim 1, characterized in that, The multimodal stimulation output module emits sound, light, and vibration stimuli that match the brainwave modulation frequency according to the instructions of the microcontroller module, forming acoustic, optical, and electronic multimodal stimulation to enhance the induction effect on brainwaves.

6. The intelligent sleep aid pillow according to claim 1, characterized in that, The microcontroller module has a built-in adaptive feedback algorithm that automatically adjusts the frequency signal output by the DDS chip and the working state of the multimodal stimulation output module based on EEG monitoring data and environmental sensor data, thereby achieving personalized sleep assistance.

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