A wearable device for prenatal education and a self-adaptive control method for sound and light stimulation thereof

Abstract

A wearable fetal education device and a sound and light stimulation self-adaptive control method thereof are disclosed.The method collects stimulation coupling data for a stimulation event, determines an effective stimulation state according to target stimulation parameters and the stimulation coupling data, establishes a response observation interval based on the same stimulation event, collects multiple abdominal movement signals and maternal reference movement signals, and uses the maternal reference movement signals and stimulation interference reference formed by the stimulation coupling data to suppress maternal overall movement and interference generated by the stimulation component itself to determine a corresponding effective response.The effective stimulation state and the effective response are paired to determine subsequent sound and light stimulation parameters.The present application can distinguish between insufficient stimulation and low response state under effective stimulation, and improve the reliability of stimulation response pairing and sound and light stimulation self-adaptive control.

Description

Technical Field

[0001] This invention relates to the field of health management, and more specifically, to a wearable prenatal education device and its adaptive control method for sound and light stimulation. Background Technology

[0002] Prenatal education devices can deliver prenatal education content to the user's abdominal area through stimulation such as sound and light. With the development of flexible sensing, wearable detection, and intelligent control technologies, some prenatal education devices can also adjust the stimulation content or parameters based on abdominal movement detection results, thereby giving the stimulation output a certain degree of feedback regulation capability.

[0003] For wearable prenatal education devices, the stimulation parameters set by the controller and the stimulation execution state formed by the stimulation components in the actual wearing state are not necessarily consistent. For example, when the tightness of the wearer changes, the local contact state between the stimulation components and the abdomen changes, or the user adjusts their body posture, even if the sound stimulation component or light stimulation component receives the same control command, the actual action conditions formed relative to the abdominal area may change.

[0004] In this scenario, if the target stimulus parameters set by the controller are directly taken as the actual stimulus state, and the next stimulus parameters are adjusted solely based on whether abdominal movement is detected after the stimulus, it becomes difficult to distinguish whether the result is due to the current stimulus not being effectively executed under actual wearing conditions, or because the stimulus was effectively executed but no corresponding local motor response was generated, when no obvious response is detected. Therefore, simply relying on the correspondence between "target stimulus parameters and detected response" for closed-loop adjustment may lead to changes in stimulus execution state being incorrectly attributed to changes in response.

[0005] On the other hand, wearable prenatal education devices are susceptible to the influence of various mechanical motion components when detecting abdominal movements. When the user turns, adjusts their posture, or undergoes other overall body movements, multiple abdominal movement detection locations may simultaneously generate motion signals. Furthermore, the mechanical vibrations generated by the acoustic stimulation component itself during the output of acoustic stimulation may couple to the abdominal movement detection component via the wearer and the abdominal surface, forming a detection signal with a strong temporal correlation to the start of the acoustic stimulation. Directly using this type of signal as the localized motion response after stimulation may reduce the reliability of the stimulation response assessment.

[0006] Therefore, a sound and light stimulation control scheme suitable for wearable prenatal education devices is needed, so that the system can determine the actual stimulation execution state of each stimulation event under the current wearing conditions, reduce the interference of the mother's overall movement and the operation of the stimulation component itself on the abdominal movement detection, and form a reliable data correspondence between the actual stimulation execution state and the corresponding effective response for subsequent adaptive control of sound and light stimulation. Summary of the Invention

[0007] One of the objectives of this invention is to provide a wearable prenatal education device and its sound and light stimulation adaptive control method, so as to at least partially solve the problem that when the wearable state changes, the target stimulation parameters cannot accurately represent the actual stimulation execution state, thereby affecting the subsequent stimulation feedback control.

[0008] Another objective of this invention is to reduce the interference of the overall maternal movement and the mechanical operation of the stimulation component itself on the abdominal movement detection results when determining the stimulus-related abdominal movement response, and to establish a data association between the stimulus execution state determination process and the stimulus response determination process based on the same stimulus event.

[0009] In one aspect, the present invention provides an adaptive control method for acoustic and optical stimulation of a wearable prenatal education device.

[0010] The method may include determining stimulus event data corresponding to the current stimulus event. The stimulus event data may include at least an event identifier, a stimulus reference time, and target stimulus parameters. The target stimulus parameters may include at least one of acoustic stimulus parameters and light stimulus parameters.

[0011] Based on the stimulus event data, control at least one of the acoustic stimulation component and the light stimulation component to execute the current stimulus event, and obtain stimulus coupling data synchronously or in accordance with the timing corresponding to the current stimulus event.

[0012] Stimulus coupling data may include at least one of the following: contact data of the corresponding region of the stimulus component and stimulus feedback data of the stimulus component. The effective stimulus state of the current stimulus event is determined based on the target stimulus parameters and the stimulus coupling data.

[0013] Here, the target stimulus parameter characterizes the stimulus planned to be output by the control component, while the effective stimulus state characterizes the stimulus execution result obtained by combining the current stimulus feedback and the wearing coupling conditions. Therefore, the same target stimulus parameter can correspond to different effective stimulus states under different wearing states.

[0014] Effective stimulus states may include at least one of effective acoustic stimulus representation, effective optical stimulus representation, and stimulus coupling confidence.

[0015] Establish a response observation interval based on the stimulus baseline time corresponding to the current stimulus event, and obtain multiple abdominal motion signals and maternal reference motion signals within the response observation interval.

[0016] Based on the maternal reference motion signal, the overall maternal motion components in multiple abdominal motion detection channels can be estimated, and the corresponding overall maternal motion components can be at least partially suppressed.

[0017] Furthermore, stimulus interference references can be formed based on stimulus coupling data obtained during the execution of the current stimulus event.

[0018] Especially when the acoustic stimulation component delivers acoustic stimulation, the mechanical operation of the component itself may create mechanical interference that can be detected by the abdominal motion detection component through the wearer. A stimulation interference reference can be formed based on at least one of the acoustic output feedback, contact data, and acoustic stimulation parameters, and the stimulation interference components in different abdominal motion detection channels can be determined based on this reference.

[0019] Therefore, the data generated during the stimulus execution state determination process is not only used to determine the effective stimulus state, but also further used as input to the abdominal motor response determination process to at least partially suppress detection interference generated by the stimulus component itself.

[0020] After suppressing the overall maternal motion component and the stimulus interference component, local motion events can be identified based on the remaining motion signals in multiple abdominal motion detection channels. The effective response corresponding to the current stimulus event can be determined based on the temporal relationship, spatial distribution relationship, and signal quality between the local motion event and the current stimulus event.

[0021] Establish stimulus-response pairing relationships between the effective stimulus state and the effective response corresponding to the current stimulus event, based on the event identifier.

[0022] Therefore, the stimulus execution state determination process and the stimulus response determination process are not two independent detection processes. On the one hand, they are triggered by the same stimulus event data and use the same event identifier and corresponding time base to establish data correspondence; on the other hand, the stimulus interference reference formed during the stimulus execution state determination process further participates in the stimulus response determination process.

[0023] The stimulus-response pairing relationship can be used to determine the stimulus-response state of the current stimulus event.

[0024] If a valid response that meets the conditions has not been determined, the current stimulus event can be further judged as either a state of insufficient stimulus execution or a low response state under valid stimulus based on the state of the valid stimulus.

[0025] When the stimulus coupling confidence is insufficient, or the effective stimulus representation quantity corresponding to the current stimulus event is significantly lower than the corresponding normal execution condition, it can be determined that the current stimulus event is in a state of insufficient stimulus execution. In the state of insufficient stimulus execution, priority can be given to adjusting the wear status, changing the stimulus unit, or re-executing the corresponding stimulus, and the increase in stimulus output level should be restricted based solely on the failure to determine an effective response.

[0026] When the effective stimulus state meets the corresponding execution conditions, but no effective response meeting the conditions is identified within the response observation interval, it can be determined that the current stimulus event is in a low-response state under effective stimulus. In this case, the sound-light combination relationship, stimulus rhythm, stimulus duration, stimulus location, or stimulus output level of subsequent stimulus events can be changed.

[0027] The stimulus-response pairings corresponding to multiple stimulus events can be saved as historical stimulus-response data.

[0028] Historical stimulus-response data can be maintained separately for acoustic stimuli, light stimuli, and combined acoustic-light stimuli, and it is preferable to use the effective stimulus state rather than the target stimulus parameter alone as at least one index condition for the historical data.

[0029] For multiple candidate stimulus events, the corresponding response evaluation results can be determined based on the expected effective stimulus state of the candidate stimulus event in the current wearing state and historical stimulus-response data, and subsequent stimulus events can be determined from the candidate stimulus events that meet the preset stimulus constraints.

[0030] When multiple candidate stimuli can meet the corresponding response conditions, the candidate stimuli with the lower expected effective stimulus level can be selected first, so that the subsequent stimulus selection is based on the relationship between the actual stimulus execution status and the historical response.

[0031] In another aspect, the present invention provides a wearable prenatal education device.

[0032] The wearable prenatal education device may include a wearable main body, an acoustic stimulation component, a light stimulation component, a stimulation coupling detection component, an abdominal movement detection component, a reference movement detection component, and a control component.

[0033] The acoustic stimulation component and the optical stimulation component are disposed on the wearable body and are used to apply at least one of acoustic stimulation and optical stimulation to the corresponding abdominal area under the control of the control component.

[0034] The stimulus coupling detection component is used to obtain stimulus coupling data related to the actual execution state of the stimulus component. The stimulus coupling detection component may include one or more of contact detection elements, acoustic output feedback detection elements, and optical output feedback detection elements.

[0035] The abdominal motion detection component may include multiple abdominal motion detection units to form multiple abdominal motion detection channels.

[0036] The reference motion detection component is used to obtain a reference motion signal that can characterize the overall motion of the parent body.

[0037] The control component can determine the effective stimulus state and corresponding effective response based on the same stimulus event, and use the stimulus coupling data obtained during the stimulus execution process to form a stimulus interference reference, establish a stimulus-response pairing relationship between the effective stimulus state and the effective response, and control subsequent stimulus events accordingly.

[0038] Therefore, the present invention can produce at least the following technical effects.

[0039] First, by distinguishing between the target stimulus parameters and the effective stimulus state, and by combining the stimulus output feedback and the wear coupling state to determine the effective stimulus state, the impact of inconsistencies between the target stimulus parameters and the actual stimulus execution state caused by factors such as loose wear and changes in local contact on feedback control can be reduced.

[0040] Secondly, by using multiple abdominal motion signals and maternal reference motion signals to determine local motion responses, the interference caused by overall maternal motion on stimulus response detection can be at least partially suppressed. Furthermore, by utilizing stimulus interference references formed during stimulus execution, the possibility of the acoustic stimulus component's own mechanical output being identified as a stimulus-related response can be reduced.

[0041] Furthermore, since the determination of the effective stimulus state and the determination of the effective response are based on the same stimulus event to establish a correspondence, and the data generated during the stimulus execution process further participates in the determination of the effective response, it is possible to distinguish between two different states: "the actual execution of the stimulus is insufficient and no effective response is obtained" and "the stimulus has been executed effectively but no effective response is obtained".

[0042] This reduces the possibility of insufficient stimulus execution due to changes in wearing status being misinterpreted as insufficient response, leading to a continuous increase in audio-visual stimulus output. It also enables subsequent stimulus parameters to be adaptively adjusted based on the relationship between the actual effective stimulus state and the corresponding effective response.

[0043] Beneficial effects: This invention uses the same stimulus event as a shared data benchmark for determining the execution state of the acoustic-optical stimulus and the abdominal response. Based on the target stimulus parameters, contact state, and stimulus output feedback, it determines the effective stimulus state of the current stimulus event. This reduces the impact of inconsistencies between the target stimulus parameters and the actual stimulus execution state caused by loose clothing, changes in local fit, and fluctuations in the output of the stimulus component on feedback control. Simultaneously, by combining the abdominal multi-channel motion signal with the maternal reference motion signal to at least partially suppress the overall maternal motion component, and by utilizing the stimulus mechanical interference reference formed during stimulus execution to further suppress mechanical interference caused by the acoustic stimulus component's own operation, it improves the reliability of identifying the local abdominal motion response corresponding to the current stimulus event. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 The schematic diagram illustrates the overall structure of a wearable prenatal education device.

[0046] Figure 2 The schematic diagram illustrates the control components and signal data flow architecture of a wearable prenatal education device.

[0047] Figure 3 This illustration demonstrates an adaptive control method for acoustic and optical stimuli.

[0048] Figure 4 The diagram illustrates the collaborative processing relationship between the stimulus event data packet and the stimulus execution state determination branch and stimulus-related response determination branch formed based on the same stimulus event.

[0049] Figure 5 The diagram illustrates the process of determining the effective stimulus state of the current stimulus event and the process of generating a stimulus mechanical interference reference.

[0050] Figure 6 This schematically illustrates the process of determining the effective abdominal response based on multi-channel abdominal motion signals, maternal reference motion signals, and stimulus mechanical interference references.

[0051] Figure 7 This schematically illustrates the process of distinguishing between under-enforcement states and low-response states under effective stimuli, and implementing subsequent controls accordingly.

[0052] Figure 8This schematically illustrates the temporal relationship of stimulus execution, stimulus-mechanical interference inhibition, response observation, stimulus-response pairing, and determination of subsequent stimulus events in a series of stimulus events. Detailed Implementation

[0053] The embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be understood that the drawings and the following embodiments are used to illustrate the technical concept of the present invention, and are not intended to limit the present invention to the specific structures, specific signal types, or specific parameter ranges shown. Compatible technical features in different embodiments can be combined or substituted for each other.

[0054] refer to Figure 1 This embodiment provides a wearable prenatal education device 100. The wearable prenatal education device 100 can be worn on the abdominal area of ​​a user and is configured to provide at least one of sound stimulation and light stimulation to the abdominal area according to a plurality of sequentially output stimulation events, while collecting data related to the actual execution state of stimulation and the abdominal movement response after stimulation, and adjusting subsequent stimulation events accordingly.

[0055] The wearable prenatal education device 100 may include a wearable main body 110, an acoustic stimulation component 120, a light stimulation component 130, a stimulation coupling detection component 140, an abdominal movement detection component 150, a reference movement detection component 160, and a control component 180. In some embodiments, the wearable prenatal education device 100 may also include a maternal status acquisition component 170.

[0056] The wearable body 110 can be configured as a flexible support structure capable of extending at least partially around the user's abdomen. The wearable body 110 can, for example, be a flexible band, a fabric band, or a wraparound structure including multiple flexible connecting segments. The wearable body 110 can be provided with a length adjustment section 111 to adjust the effective length of the wearable body 110 according to the user's waist circumference. At least one stimulation area 112 is formed on the side of the wearable body 110 near the abdomen, and at least a portion of the acoustic stimulation component 120, the light stimulation component 130, and the abdominal movement detection component 150 can be provided corresponding to the stimulation area 112.

[0057] The acoustic stimulation assembly 120 includes at least one acoustic stimulation unit 121. The acoustic stimulation unit 121 may be a loudspeaker, an attached acoustic transducer, a vibratory acoustic transducer, or other transducer capable of converting an electrical control signal into an acoustic output. In embodiments where multiple acoustic stimulation units 121 are used, the multiple acoustic stimulation units 121 may be arranged at intervals along the extension direction of the wearable body 110, enabling the control assembly 180 to select one or more acoustic stimulation units 121 to output acoustic stimulation.

[0058] The photostimulation component 130 includes at least one photostimulation unit 131. The photostimulation unit 131 may include a light-emitting diode, a flexible light-emitting component, or other light-emitting structure capable of generating light output according to an electrical control signal. Multiple photostimulation units 131 may be arranged alternately with multiple acoustic stimulation units 121, grouped together, or each forming a different stimulation region. The control component 180 can control the operating state of different photostimulation units 131 individually, thereby forming different output positions, output durations, brightness levels, pulse duty cycles, or time variation patterns.

[0059] The terms "audio stimulation" and "optical stimulation" as used herein primarily refer to the physical output delivered by the wearable prenatal education device 100 to the corresponding area on the abdominal surface. In particular, the effective audio stimulation and effective optical stimulation metrics described below are used to characterize the actual performance of the audio stimulation component 120 and the optical stimulation component 130 under current wearing conditions, and should not be construed as direct measurements of the sound pressure, light dose, or other physical quantities actually received by the fetus.

[0060] The stimulus coupling detection component 140 is used to obtain data characterizing the current interaction conditions between the stimulus component and the user's abdomen. Figure 1 In the illustrated embodiment, the stimulus coupling detection component 140 may include one or more of the following: a contact detection element 141, an acoustic output feedback detection element 142, and an optical output feedback detection element 143.

[0061] The contact detection element 141 can be disposed near the acoustic stimulation unit 121 and / or the optical stimulation unit 131, and is used to obtain a contact signal characterizing the local contact state between the wearer 110 and the abdomen. The contact detection element 141 can be formed, for example, by a pressure sensor, a flexible pressure sensing membrane, a strain sensor, or other detection structure that can change its output according to changes in the local contact state. Based on the contact signal, the control component 180 can distinguish between situations where the stimulation unit is in a relatively stable fit and situations where the stimulation unit has experienced localized lifting, loosening, or significant changes in contact.

[0062] The acoustic output feedback detection element 142 is used to obtain feedback signals related to the actual operation of the acoustic stimulation unit 121. The acoustic output feedback detection element 142 can be a miniature acoustic detection element, vibration detection element, or inertial detection element disposed near the acoustic stimulation unit 121. When the acoustic stimulation unit 121 is driven, the output of the acoustic output feedback detection element 142 can at least partially characterize whether the acoustic stimulation unit 121 has generated an actual output according to the control command and the change in mechanical coupling between the current output and the wearing state.

[0063] The light output feedback detector 143 is used to obtain a light feedback signal related to the actual operation of the photostimulation unit 131. The light output feedback detector 143 can be, for example, a photoelectric detector located adjacent to the photostimulation unit 131. The light output feedback detector 143 does not need to measure the amount of light entering the human tissue, but can be used to confirm the actual light emission state of the photostimulation unit 131, and, combined with the detection results of the contact detector 141, form characterization data of the current photostimulation execution state.

[0064] In another embodiment, it is not required that each stimulation unit be equipped with a complete contact detection element 141, acoustic output feedback detection element 142, and optical output feedback detection element 143. Multiple stimulation units can share one or more detection elements, as long as the detection result can establish a correspondence with the currently activated stimulation unit or stimulation area.

[0065] The abdominal motion detection assembly 150 includes multiple abdominal motion detection units 151. These multiple abdominal motion detection units 151 are preferably spaced apart along the wearable body 110, thereby forming multiple abdominal motion acquisition channels. The abdominal motion detection units 151 may include piezoelectric sensors, flexible pressure sensors, inertial sensors, displacement sensors, or other detection structures capable of responding to localized mechanical movements of the abdomen. The abdominal motion signals generated by different abdominal motion detection units 151 can be used to characterize localized motion changes in different abdominal regions over time.

[0066] The reference motion detection component 160 is configured to obtain a reference motion signal related to the user's overall movement. The reference motion detection component 160 may include, for example, an inertial measurement unit 161 disposed at a relatively stable position on the wearable body 110. The inertial measurement unit 161 may include at least one of an acceleration detection unit and an angular velocity detection unit. When the user performs a turn, adjusts their sitting posture, walks, or performs other overall body movements, the reference motion detection component 160 can generate a corresponding reference motion signal.

[0067] By simultaneously setting up the abdominal motion detection component 150 and the reference motion detection component 160, motion components that appear together from multiple abdominal acquisition channels and have a high temporal correlation with the reference motion signal can be identified as components related to the overall maternal motion, and these components can be at least partially suppressed. Therefore, compared to using only a single abdominal sensor to detect motion, interference caused by the overall maternal motion on the identification of local abdominal motion events can be reduced.

[0068] The optional maternal status acquisition component 170 may include a pulse detection unit, a skin conductance detection unit, a respiration detection unit, or other detection units used to obtain the user's current physiological trends. In this embodiment, the detection results of the maternal status acquisition component 170 are primarily used to determine whether to maintain, reduce, or pause the stimulation output. For example, when the validity of the detection data is insufficient or when sustained large-amplitude movements of the user are detected, the current adaptive update can be paused. This embodiment does not require the formation of disease diagnoses, fetal health assessments, or medical risk levels based on the data from the maternal status acquisition component 170.

[0069] refer to Figure 2 The control component 180 may include at least one processor 181, at least one machine-readable storage medium 182, and a synchronization clock unit 183. The machine-readable storage medium 182 may store instructions executable by the processor 181, as well as stimulus content data, stimulus parameter data, historical stimulus-response data, and corresponding control parameters.

[0070] The synchronization clock unit 183 provides a shared or interchangeable time reference for the acoustic stimulation component 120, the optical stimulation component 130, the stimulation coupling detection component 140, the abdominal motion detection component 150, and the reference motion detection component 160. Different detection components do not need to use the same sampling frequency, but their detection data are preferably mapped to a unified time axis. Thus, the control component 180 can determine which acoustic or optical stimulation event corresponds to a given detection result.

[0071] In this embodiment, each independently trackable sound stimulus, light stimulus, or combined sound and light stimulus is defined as a stimulus event. A stimulus event can correspond to a segment of content in a complete prenatal education program, or it can correspond to a separately controllable stimulus stage within a segment of content.

[0072] For the first stimulus event, control component 180 generates a stimulus event data packet. The stimulus event data packet can be represented as follows:

[0073] Wherein, represents the event identifier of the i-th stimulus event, represents the baseline start time of the stimulus event, represents the target stimulus parameter, represents the stimulus duration parameter, represents the baseline interval corresponding to the stimulus event, and represents the response observation interval corresponding to the stimulus event.

[0074] The target stimulus parameters may further include acoustic stimulus parameters and optical stimulus parameters. Acoustic stimulus parameters may include one or more of the following: acoustic output level, frequency characteristics, rhythmic characteristics, output duration, and acoustic stimulus unit 121 involved in the output. Optical stimulus parameters may include one or more of the following: optical output level, pulse frequency, duty cycle, output duration, and optical stimulus unit 131 involved in the output.

[0075] Event identifiers are simultaneously assigned to data generated by or collected around the current stimulus event. In other words, stimulus execution data, abdominal movement data, and intermediate processing results derived from these data can all be correlated with the current stimulus event through event identifiers.

[0076] The stimulus event data packet is therefore not only used to record stimulus content. It also serves as shared trigger data for the stimulus execution state determination process and the stimulus-related response determination process. When the first stimulus event is established, on the one hand, the acoustic stimulation component 120 and / or the light stimulation component 130 are triggered to output stimuli and the stimulus coupling detection component 140 is triggered to form corresponding data; on the other hand, the abdominal motion detection component 150 and the reference motion detection component 160 are triggered to establish the corresponding response observation process according to the same time base.

[0077] refer to Figure 3 This embodiment further provides an adaptive control method 200 for sound and light stimulation that can be executed by a wearable prenatal education device 100.

[0078] In step B202, the control component 180 initializes the current usage process.

[0079] Initialization may include detecting the wearing status of the wearer 110, acquiring baseline values ​​for each detection channel, and reading previously stored historical stimulus-response data. In cases of first-time use or significant differences between the current wearing status and previous status, a stimulus coupling baseline establishment process may also be performed.

[0080] The stimulation coupling baseline establishment process may include acquiring static or background signals of each contact detection element 141, acoustic output feedback detection element 142, and optical output feedback detection element 143 when the acoustic stimulation component 120 and optical stimulation component 130 are not outputting stimulation, and performing short-term test stimulation at at least one low output level to obtain stimulation feedback reference values ​​under the current wearing conditions.

[0081] This baseline establishment process does not require converting the detected values ​​into actual acoustic or light energy within the human body. Its purpose is to establish a comparable relationship between control commands and detection feedback under current wearable conditions.

[0082] In step B204, the control component 180 determines the stimulus content to be output and establishes the stimulus event data packet corresponding to the first stimulus event.

[0083] The stimulus content to be output can come from a pre-stored prenatal education content library. A complete piece of content can be divided into multiple stimulus micro-segments, each with corresponding acoustic stimulus parameters, light stimulus parameters, or acoustic-light combination parameters.

[0084] For example, a stimulus microsegment may consist only of sound output, a stimulus microsegment may consist only of light output, or it may consist of a combination of sound output and light output in a simultaneous, sound-before-light, light-before-sound, or alternating manner.

[0085] After determining the target stimulus parameters, the control component 180 assigns an event identifier to the current stimulus event, determines the stimulus baseline start time, and initiates the current stimulus event accordingly.

[0086] refer to Figure 4 The stimulus event data packet can form two interrelated data processing branches. The first data processing branch is the stimulus execution state determination branch, which is used to obtain the effective stimulus state of the current stimulus event. The second data processing branch is the stimulus-related response determination branch, which is used to obtain the effective response corresponding to the current stimulus event.

[0087] Both data processing branches use the same event identifier and the same stimulus baseline start time. Furthermore, at least a portion of the stimulus execution data generated by the first data processing branch is also provided to the second data processing branch to suppress detection interference caused by the operation of the stimulus device itself.

[0088] In step B206, the control component 180 controls at least one of the acoustic stimulation component 120 and the light stimulation component 130 to execute the current stimulation event according to the target stimulation parameters, and obtains the detection data generated by the stimulation coupling detection component 140 during the stimulation execution.

[0089] When an acoustic stimulus is output, the control component 180 can simultaneously obtain the local contact signal generated by the contact detection element 141 and the acoustic feedback signal generated by the acoustic output feedback detection element 142.

[0090] When light stimulation is output, the control component 180 can simultaneously obtain the local contact signal and the light feedback signal generated by the light output feedback detector 143.

[0091] refer to Figure 5 The control component 180 determines the effective stimulus state of the current stimulus event based on the target stimulus parameters and the stimulus coupling detection results. The effective stimulus state can be represented, for example, as:

[0092] Wherein, represents the effective acoustic stimulus representation quantity, represents the effective optical stimulus representation quantity, and represents the stimulus coupling confidence level.

[0093] The effective acoustic stimulus representation is not simply the numerical value of the target acoustic stimulus parameters, but is determined jointly based on the target acoustic stimulus parameters, acoustic output feedback, and local contact state. It can be generally expressed as:

[0094] Wherein, represents the contact state characteristics obtained from the local contact signal of the current stimulus event, represents the acoustic execution characteristics obtained from the acoustic feedback signal, and represents the mapping relationship used to form an effective acoustic stimulus representation quantity.

[0095] Similarly, the effective light stimulus characterization quantity can be expressed as:

[0096] Wherein, represents the optical execution characteristics obtained from the optical feedback signal, and represents the mapping relationship used to form an effective optical stimulation characterization quantity.

[0097] Functions can be derived from pre-labeled lookup tables, piecewise mapping functions, weighted calculation models, or regression relationships determined using historical normal wearing data. The key is that the same or similar target stimulus commands can produce distinguishable and effective stimulus representations under different wearing coupling states.

[0098] For example, when the target acoustic stimulus parameters remain the same but the actual vibration feedback detected by the acoustic output feedback detector 142 decreases significantly, and the corresponding contact detector 141 simultaneously shows a decrease in local contact pressure, the current effective acoustic stimulus characterization quantity can be determined to be lower than the corresponding value under normal contact conditions.

[0099] If the light output feedback indicates that the light stimulation unit 131 is emitting light normally, but the corresponding contact detection element 141 indicates that the stimulation area is significantly raised, the control component 180 can reduce the stimulation coupling confidence of the current stimulation event without changing the target light stimulation parameters themselves, provided that the target light stimulation parameters remain the same.

[0100] Stimulus coupling reliability characterizes the reliability with which the current effective stimulus state is used for subsequent stimulus-response pairing. Stimulus coupling reliability can be determined based on at least one of the following: contact signal stability, stimulus output feedback integrity, overall motion of the wearer 110 during stimulation, and detection channel integrity.

[0101] Therefore, in this embodiment, stimulus control commands and effective stimulus states are processed separately. The target stimulus parameter represents the stimulus planned to be implemented by the control component 180, while the effective stimulus state represents the stimulus execution result obtained by combining the current actual output feedback and wear coupling conditions.

[0102] During the operation of the acoustic stimulation unit 121, the mechanical movement of the acoustic stimulation unit 121 itself may also be transmitted to one or more abdominal motion detection units 151 via the wearable body 110 or the abdominal surface. As a result, at the start of acoustic stimulation or when the acoustic stimulation parameters change rapidly, the abdominal motion detection component 150 may exhibit a mechanical response that is not formed by localized voluntary abdominal movement.

[0103] In order to reduce the misidentification of such mechanical coupling signals as valid abdominal responses after stimulation, in step B206, the control component 180 can also form a stimulus mechanical interference reference corresponding to the current stimulus event based on the acoustic output feedback signal, the local contact signal and the current acoustic stimulation parameters.

[0104] The stimulus mechanical interference reference can represent the temporal characteristics of potential mechanical interference generated by the output of the acoustic stimulation unit 121, coupled to the abdominal motion detection component 150 via the wearable body 110 and the current local contact structure. The stimulus mechanical interference reference can be directly derived from the filtered, time-aligned, and amplitude-normalized acoustic feedback signal, or it can be obtained from the acoustic feedback signal based on a predetermined transmission relationship.

[0105] In one implementation, the coupling coefficient between the acoustic output feedback detector 142 and different abdominal motion detection channels can be determined during the aforementioned low-level test stimulation. For the i-th abdominal motion detection channel, the corresponding stimulation coupling coefficient can be obtained. During subsequent normal stimulation, the predictable mechanical effects of the acoustic stimulus itself on the i-th abdominal motion detection channel can be utilized.

[0106] Thus, step B206 not only generates a valid stimulus state for determining whether the stimulus is effectively executed, but also generates a stimulus-mechanical interference reference that can be used in subsequent abdominal movement processing.

[0107] In step B208, the control component 180 establishes the response observation interval corresponding to the current stimulus event based on the stimulus event data packet.

[0108] The response observation interval can be represented as:

[0109] Wherein, represents the observation start offset relative to the stimulus reference start time, represents the observation end offset, and .

[0110] For different types of stimulus microsegments, the set values ​​can be different. For example, for acoustic stimuli with a significant initiation transient, the response observation interval can be made to avoid the short time interval immediately adjacent to the initiation edge of the acoustic stimulus, in order to further reduce the impact of the mechanical transient of the stimulus on the recognition of motion events.

[0111] The response observation interval can also be established relative to the end of the stimulus, based on the current stimulus duration parameter. For example, separate observation sub-intervals can be formed during the stimulus and after the stimulus ends.

[0112] Regardless of the specific method used, the response observation interval is established by the current stimulus event and associated with the event identifier, rather than searching for motion events without a time reference in continuous abdominal motion signals.

[0113] In step B210, within the baseline interval and response observation interval associated with the current stimulus event, the abdominal motion detection component 150 acquires raw motion signals from multiple abdominal motion channels:

[0114] Wherein, represents the number of abdominal motion detection channels, and represents the original motion signal of the i-th abdominal motion detection channel.

[0115] The reference motion detection component 160 synchronously acquires the reference motion signal. The reference motion signal can be a multidimensional inertial signal, or it can be preprocessed to form a reference sequence representing the overall motion intensity and direction of the parent body.

[0116] In step B212, the control component 180 suppresses components related to the overall movement of the mother and the mechanical coupling of the stimulation device itself from multiple abdominal motion signals, forming multiple net abdominal motion signals.

[0117] For the th abdominal motion detection channel, its net abdominal motion signal can be generally expressed as:

[0119] Wherein, represents the overall motion component of the parent body in the i-th channel estimated based on the reference motion signal, and represents the stimulus mechanical interference component in the i-th channel estimated based on the stimulus mechanical interference reference generated by the first data processing branch.

[0120] The overall motion components of the mother body can be obtained through linear mapping, time delay mapping, adaptive filtering, or other methods that can estimate common motion components between the reference motion signal and the corresponding abdominal motion detection channel.

[0121] For example, within the baseline interval prior to the current stimulus event, maternal motion coupling parameters can be determined based on the relationship between the i-th abdominal motion detection channel and the reference motion signal, and based on:

[0122] Obtain the overall motion components of the mother body.

[0123] The mechanical interference component of the stimulus can be determined based on:

[0124] get.

[0125] The functions are not required to be in a fixed form. They can be linear combinations, finite impulse response filtering relationships, time delay compensation relationships, or lookup relationships obtained through pre-testing.

[0126] In particular, the stimulus mechanical interference reference originates from the aforementioned stimulus execution state determination branch. Therefore, the actual mechanical feedback of the current stimulus is not only used to determine whether the acoustic stimulus is executed as expected, but is also used by the second data processing branch to reduce spurious responses to the abdominal motion detection results caused by the acoustic stimulus component 120's own movement.

[0127] When there is no acoustic stimulation or the mechanical coupling between the current acoustic stimulation unit 121 and the abdominal motion detection component 150 is lower than a preset condition, it can be set to zero or the corresponding processing can be omitted.

[0128] refer to Figure 6 After acquiring multiple net abdominal motion signals, the control component 180 identifies candidate local motion events within the current response observation interval.

[0129] Candidate local motion events can be determined based on one or more of the following: amplitude change, signal energy, duration, inter-channel temporal relationship, and spatial distribution.

[0130] For example, a candidate local motion event can be established when at least one abdominal net motion channel shows a significant change relative to its baseline level over a continuous time period, and the change does not form a global motion pattern that is highly consistent with the reference motion signal.

[0131] For each candidate local motion event, the control component 180 can determine at least one of the following characteristics: event start time, event duration, peak amplitude, event energy, set of participating channels, spatial concentration, and residual correlation with the reference motion signal.

[0132] When multiple abdominal channels simultaneously exhibit similar changes and the motion detection component 160 synchronously detects significant overall movement, the candidate event can have its credibility reduced or be excluded from the valid response to the current stimulus event.

[0133] Conversely, when the motion is mainly concentrated in a portion of adjacent channels of the abdominal motion detection component 150, and there is no corresponding overall motion in the reference motion signal, the candidate event can have a high degree of confidence in local motion.

[0134] The control component 180 further determines the temporal correlation between the candidate local motion event and the current stimulus event based on whether the candidate local motion event is located within the response observation interval of the current stimulus event.

[0135] For candidate events that meet the conditions of local motion, time, and signal quality, an effective response corresponding to the current stimulus event can be formed.

[0136] A valid response can be represented as, for example:

[0137] Wherein, represents the response intensity characterization quantity, represents the response delay relative to the stimulus baseline start time, represents the response duration characteristic, represents the response spatial distribution characteristic, and represents the response confidence.

[0138] Here, "effective response" refers to a localized abdominal motor response obtained through the aforementioned signal processing and that has a temporal correspondence with the current stimulus event. This effective response can be used as device control feedback, without requiring a judgment of the fetal physiological state based on a single effective response.

[0139] When there are no candidate local motion events that meet the valid response determination criteria within the response observation interval, the response state corresponding to the current stimulus event can be recorded as no valid response, while the stimulus execution state of the current stimulus event is retained.

[0140] In step B214, the control component 180 establishes a pairing relationship between the effective stimulus state and the effective response corresponding to the same stimulus event.

[0141] The stimulus-response pairings for the current stimulus event can be represented as:

[0142] Alternatively, it may include target stimulus parameters, response observation intervals, current maternal motion state, and corresponding data quality parameters.

[0143] Because they have the same event identifier, the control component 180 is able to avoid mispairing response data between adjacent stimulus events.

[0144] For example, if the second stimulus event begins shortly after the first stimulus event ends, the control component 180 can process overlapping data based on the respective response observation intervals and event identifiers of the two events. For motion events that cannot be reliably attributed to a single stimulus event, their response confidence can be reduced, or the motion event can be omitted from updating historical stimulus-response relationships.

[0145] In step B216, the control component 180 determines the stimulus-response state of the current stimulus event based on the effective stimulus state and the effective response.

[0146] refer to Figure 7 If the current stimulus event does not receive a valid response, the situation is not directly interpreted as requiring an increase in stimulus intensity. Control component 180 first determines whether the valid stimulus state of the current stimulus event meets the execution conditions that can be used to evaluate the response.

[0147] For example, conditions for effective stimulus execution can be set:

[0148] Furthermore, for the current type of stimulus involved in the output, the corresponding effective stimulus representation quantity is not lower than the corresponding minimum effective representation condition.

[0149] When the relevant stimulus quantity in the effective acoustic stimulus representation quantity and the effective light stimulus representation quantity is significantly lower than the normal execution range corresponding to the current target stimulus parameter, the control component 180 can determine the current event as a state of insufficient stimulus execution.

[0150] Insufficient stimulus execution indicates that there is currently no effective response and it cannot be reliably used to evaluate the response of the current stimulus pattern itself. For example, if the wearable body 110 becomes loose, causing a significant decrease in the mechanical coupling between the acoustic stimulation component 120 and the abdomen, even if the control component 180 has sent a predetermined drive command to the acoustic stimulation component 120, the target acoustic stimulation level for the next acoustic stimulation event cannot be increased simply because no effective response has been detected.

[0151] When the stimulus coupling confidence satisfies the effective execution condition, and the corresponding effective stimulus representation is within the evaluable range, but no effective response meeting the condition is obtained within the response observation interval, the current event can be identified as a low response state under effective stimulus.

[0152] Different subsequent control strategies arise from under-stimuli and low-response states under effective stimuli.

[0153] In cases of insufficient stimulus execution, the control component 180 prioritizes stimulus execution recovery processing. Stimulus execution recovery processing may include one or more of the following: selecting other stimulus units with a more stable current wearable state, reducing the data weight of the current event, re-executing the same or similar target stimulus event, and outputting prompts to prompt adjustments to the wearable device 110.

[0154] In particular, in the case of insufficient stimulus execution, the control component 180 can limit the increase of stimulus output level based solely on the result of "no effective response obtained".

[0155] For a low response state under effective stimulation, the control component 180 can use the paired sample to update the historical response record of the corresponding stimulation mode, and change the sound-light combination relationship, output rhythm, stimulation duration, temporal relationship between sound stimulation and light stimulation, or change the stimulation output level within the allowable range during subsequent stimulation selection.

[0156] Thus, the same "no valid response detected" can be distinguished into different technical states based on the valid stimulus state determined in step B206.

[0157] When a current stimulus event receives a valid response, the control component 180 can also determine the valid stimulus state corresponding to that valid response. If valid responses with high confidence have been obtained consecutively at a low level of valid stimulus representation, the priority of further increasing stimulus output can be reduced in subsequent stimulus selection.

[0158] In step B218, the control component 180 updates the historical stimulus-response data using the current stimulus-response pair sample P_i.

[0159] Historical stimulus-response data can be categorized according to stimulus patterns. In one implementation, machine-readable storage medium 182 maintains acoustic stimulus response records, optical stimulus response records, and combined acoustic-optical stimulus response records.

[0160] Acoustic stimulus response records primarily preserve the effective acoustic stimulus representations, corresponding stimulus parameters, and effective responses during acoustic stimulus events. .

[0161] Light stimulus response recordings primarily preserve effective light stimulus representations from light stimulus events. , corresponding stimulus parameters and effective response .

[0162] The sound-light combined stimulus response record preserves the effective stimulus state and corresponding effective response when sound stimuli and light stimuli appear together or have a predetermined temporal relationship.

[0163] Historical records preferably use the effective stimulus state as at least one index condition, rather than only using the target stimulus parameter as an index condition. Therefore, stimulus events generated by the same target stimulus instruction in different wearing states can be recorded separately based on the actual effective stimulus representations generated in each state.

[0164] For example, two stimulus events use the same target sound stimulus level, but the first stimulus event is in a stable fit state and has a higher level of stimulation. The second stimulus event is in a state of localized loosening and therefore has a lower [potential]. In historical response records, the two are not simply considered as equivalent test samples under the same sound stimulus level.

[0165] In step B220, the control component 180 generates multiple subsequent candidate stimulus events.

[0166] Candidate stimulus events can be derived from multiple permissible content segments of the current prenatal education content, or they can be obtained by making limited adjustments to the target stimulus parameters of the current stimulus segment. Candidate stimulus events can include sound-only stimulation, light-only stimulation, and combined sound and light stimulation.

[0167] For each candidate stimulus event, the response evaluation value of the candidate stimulus event can be determined based on historical stimulus-response data, and further consideration can be given to the expected effective stimulus level, current wearing status, degree of stimulus change and repetition compared to the previous stimulus event.

[0168] For example, the The candidate evaluation metric for a candidate stimulus event can be generally expressed as:

[0169]

[0170] in, This represents the predicted response evaluation quantity determined based on historical stimulus-response paired samples. This indicates the expected execution confidence of the candidate event under the current wearing state. This indicates the expected effective stimulus level corresponding to the candidate event. This indicates the degree of change of the candidate event relative to the current stimulus event. Indicates the degree of repetition of candidate stimulus events. to This indicates the corresponding weight.

[0171] The above expression is only used to illustrate one way of combining different evaluation factors. In actual implementation, hierarchical rules, lookup tables, decision trees, or other deterministic control logic can also be used, and the linear weighting form described above is not required.

[0172] Among them, the expected response evaluation quantity It can be determined based on historical paired samples that have similar effective stimulus states to the candidate stimulus event. For example, historical stimulus-response paired samples in which the effective acoustic stimulus representation, effective light stimulus representation, and stimulus timing parameters fall into the corresponding neighborhood can be selected, and the expected response evaluation quantity can be formed based on the effective response in these samples.

[0173] In step B222, the control component 180 determines the next stimulus event from the candidate stimulus events that satisfy the preset stimulus constraints.

[0174] Preset stimulus constraints may include at least one of the following: upper limit of acoustic stimulus output, upper limit of light stimulus output, upper limit of single stimulus duration, limit of continuous stimulus time, and minimum interval between adjacent stimulus events.

[0175] When multiple candidate stimulus events all have a predicted response evaluation quantity that meets the conditions, the candidate stimulus event with the lower predicted effective stimulus level can be selected first.

[0176] For example, if historical data shows that a stable effective response can be formed when a lower effective sound stimulus is combined with a lower effective light stimulus in a predetermined sequence, and increasing the sound stimulus level alone does not significantly improve the effective response, then the corresponding combined sound and light stimulus can be selected first, rather than continuing to increase the sound stimulus output level.

[0177] If the current stimulus event is determined to be in a state of insufficient stimulus execution, step B222 may temporarily not increase the stimulus level of the candidate stimulus event based on the lack of response to the current event, but instead prioritize selecting a stimulus location with higher expected execution confidence or prompting a readjustment of the wearing status.

[0178] When the current stimulus event is determined to be a low-response state under effective stimulus, step B222 may preferentially change the combination relationship, time structure or content micro-segments between the sound and light stimuli, and make limited adjustments to the stimulus output level only when the preset stimulus constraints are met.

[0179] In step B224, control component 180 establishes a data packet for the next stimulus event. The process then repeats steps B204 to B222 according to the new stimulus events, thereby forming an iterative acoustic-optical stimulus adaptive control process.

[0180] The adaptive object in this iterative process is not a simple correspondence of "target stimulus instruction - whether motion is detected", but rather a correspondence of "effective stimulus state - effective response".

[0181] In other words, step B206 first answers "in what execution state the current stimulus event was actually completed", steps B208 to B212 further answer "what kind of interference-suppressed local motion response was detected after the current stimulus event", and steps B214 to B222 use the pairing relationship between the two to determine the subsequent stimulus event.

[0182] Step B206 forms the first step group. By jointly determining the effective stimulation state based on stimulation control instructions, local contact state, and sound / light output feedback, the inconsistency between the target stimulation parameters and the actual stimulation execution state caused by changes in the tightness of the wearable body 110, local tilting of the stimulation unit, or abnormal output of the stimulation component can be reduced.

[0183] Steps B208 to B212 form the second step group. This is achieved by using data packets of the same stimulus events. Multiple abdominal motion signals and maternal reference motion signals were simultaneously obtained within the established response observation interval, and the overall maternal motion component was at least partially suppressed, which can reduce the interference of overall maternal motion on the determination of stimulus-related local motion responses.

[0184] Furthermore, the second step group does not work independently of the first step group. The first step group is based on the stimulus mechanical interference reference generated during the actual execution of the acoustic stimulus. It is also provided to the second step group to suppress spurious stimulus responses caused by the mechanical operation of the acoustic stimulation component 120 itself from the abdominal motion detection signal.

[0185] Therefore, the stimulus execution data generated in the first step group is used both to evaluate whether the stimulus is actually executed effectively and to improve the response signal processing in the second step group.

[0186] Furthermore, the first and second step groups consist of the same stimulus event data packet. Triggered, and via the same event identifier and time base Establish data correspondences. This results in stimulus-response paired samples. It can characterize the actual stimulus execution state and its corresponding local motion response under a given stimulus event.

[0187] This data relationship enables the control component 180 to further distinguish at least two situations that are easily confused in traditional simple response feedback control: the first is that the target stimulus has been emitted, but due to insufficient wear coupling, the effective stimulus state is insufficient, and therefore no effective response is obtained; the second is that the stimulus is in an effective execution state, but no effective response is obtained within the corresponding response observation interval.

[0188] Although both situations may result in "no effective response" in the abdominal movement detection results, they have different subsequent control methods in this embodiment.

[0189] This can reduce the situation where insufficient actual stimulus execution is mistakenly interpreted as insufficient response, leading to a continuous increase in audio-visual stimulus parameters, and ensure that subsequent audio-visual stimulus adjustments are based more on the actual stimulus-response relationship rather than simply on the target stimulus instruction.

[0190] The following is a specific operational process to further illustrate this.

[0191] After the user wears the wearable prenatal education device 100, the control component 180 first obtains contact signals from multiple contact detectors 141. When the contact signal corresponding to the sound stimulation unit 121 located in the first abdominal region is within a preset stable range, the control component 180 allows the selection of the sound stimulation unit 121 as a candidate output unit.

[0192] Control component 180 establishes the first stimulus event. The acoustic stimulation unit 121 is driven according to the first target acoustic stimulation parameters. The acoustic output feedback detection device 142 synchronously obtains the first acoustic feedback signal.

[0193] If both the initial feedback signal and the corresponding contact signal are within the normal range, the control component 180 obtains an effective stimulation state with high stimulus coupling reliability. .

[0194] At the same time, a stimulus mechanical interference reference is formed based on the acoustic feedback signal. .

[0195] Within a short period after the sound stimulation is initiated, one or more adjacent abdominal motion detection units 151 may undergo synchronous changes due to the mechanical vibration of the sound stimulation unit 121 itself. Because this change is related to… With a high correlation, the control component 180 at least partially suppresses the net abdominal motion signal when it is generated, rather than directly taking the change as an effective response.

[0196] In the subsequently established response observation interval If local changes occur in some abdominal motion detection channels, and these local changes do not have a corresponding common change relationship with either the maternal reference motion signal or the stimulus mechanical interference reference, then a first effective response can be formed. .

[0197] Control component 180 establishes first stimulus-response paired samples:

[0198] And write it into the corresponding historical stimulus-response record.

[0199] Subsequently, when the wearable device 110 becomes partially loose due to changes in the user's posture, the control component 180 establishes a second stimulus event. Although the second stimulus event uses the same target acoustic stimulus parameters as the first stimulus event, the contact signal of the corresponding contact detector 141 is significantly reduced, and the acoustic feedback characteristics obtained by the acoustic output feedback detector 142 are lower than those of the first stimulus event.

[0200] Therefore, the control component 180 obtains the second effective acoustic stimulus representation. Below the first effective acoustic stimulus representation quantity Simultaneously stimulate coupling credibility reduce.

[0201] If the observation interval of the response to the second stimulus event If no effective response is obtained, the control component 180 will preferentially determine the situation as an insufficient stimulus execution state, rather than judging the decline in prenatal education response based on the fact that the target acoustic stimulus parameters are the same.

[0202] In this situation, the control component 180 can prompt adjustments to the wearer 110, or select another acoustic stimulation unit 121 with better contact, and limit direct increases in the acoustic stimulation output level.

[0203] After the user adjusts the wearable device 110, the control component 180 can re-establish the third stimulus event with the same or similar target acoustic stimulus parameters. When the effective acoustic stimulus representation of the third stimulus event is restored and an effective response is regained, it can be further confirmed that there is a correlation between the lack of response to the second stimulus event and the decline in stimulus performance.

[0204] In another operating scenario, if multiple consecutive stimulus events have high stimulus coupling confidence and the effective stimulus representations are all within the normal range, but the corresponding effective responses remain below the current control conditions, then control component 180 does not need to continue repeating the same stimulus. Control component 180 can select another acoustic-optical combination from the historical stimulus-response record, for example, maintaining or reducing the acoustic stimulus level and introducing a low-level optical stimulus, or changing the output order of the acoustic and optical stimuli.

[0205] If the sound-light combination can obtain a highly reliable effective response with a low overall effective stimulus level in multiple subsequent stimulus events, the control component 180 can improve the evaluation value of the sound-light combination in the candidate stimulus event selection process.

[0206] As a result, the device can gradually form a historical correspondence between the actual effective stimulus state and the local motion response applicable to the current use process, rather than simply forming a correspondence between the controller's target output value and the local motion response.

[0207] In another implementation, historical stimulus-response data can be maintained separately for different usage periods. For example, when the device is worn again and the difference between the wearing state and the historical wearing state is detected to exceed a preset condition, the weight of the old historical data can be reduced, and a new stimulus coupling baseline can be established in the current wearing state.

[0208] In another implementation, historical stimulus-response data can be stored using a sliding data window, giving newer stimulus-response pairs a higher data weight. This allows for adaptation to gradual changes in fit, body posture, and device position during use.

[0209] In another implementation, stimulus execution baselines and historical stimulus-response data can be maintained separately for different stimulus regions. For a certain stimulus region, if its contact state does not meet the conditions, the corresponding acoustic stimulation unit 121 or light stimulation unit 131 may temporarily not participate in the generation of candidate stimulus events, and other stimulation units in a more stable contact state may take over the output.

[0210] refer to Figure 8 In another implementation, a low-stimulation observation mode can be set. When one or more consecutive stimulus events have obtained a stable and effective response, the control component 180 can form an observation interval that reduces or pauses the audio-visual output before the next content micro-segment, and continue to collect abdominal motion signals within this observation interval. If local motion events continue to exist within the observation interval, the next stimulus event can be postponed, thereby reducing the excessive overlap between stimulus events.

[0211] In another embodiment, the maternal state signal generated by the maternal state acquisition component 170 can be used as a condition for allowing stimulus events. For example, when the overall maternal movement is consistently higher than a preset level, or when the signal quality of the maternal state acquisition component 170 is lower than the available condition, the control component 180 can pause the updating of stimulus-response paired samples to avoid updating the adaptive control relationship when the data quality is insufficient.

[0212] The wearable prenatal education device 100 may also include a human-computer interaction terminal that communicates with the control component 180. The human-computer interaction terminal may be integrated into the wearable body 110 or formed by a mobile terminal that establishes a communication connection with the wearable prenatal education device 100. The human-computer interaction terminal can be used to select prenatal education content, display the current wearing status, and output wearing adjustment prompts.

[0213] In cases of insufficient stimulus execution, the human-computer interaction terminal can output prompts corresponding to specific low-confidence areas. For example, when the contact detection element 141 corresponding to a certain acoustic stimulus unit 121 remains in a low-contact state, the user can be prompted to adjust the wearing position of the corresponding area. This prompt is a different control action from increasing the stimulus intensity, thereby further reducing the possibility of blindly increasing output due to wearing issues.

[0214] The control component 180 can be implemented by one or more processors. The generation of stimulus event data packets, determination of effective stimulus states, inhibition of maternal global motion, inhibition of stimulus mechanical interference, determination of effective responses, stimulus-response pairing, updating of historical data, and selection of candidate stimulus events can be performed by the same processor or by multiple communicating processors respectively.

[0215] Machine-readable storage medium 182 may include non-volatile memory, random access memory, or other storage devices capable of storing executable instructions and data. When processor 181 executes instructions stored in machine-readable storage medium 182, the wearable prenatal education device 100 implements the aforementioned sound and light stimulation adaptive control method 200.

[0216] It should be noted that the local abdominal motion response and the resulting stimulus-response pairing data in this embodiment are mainly used for the stimulation output control and stimulation parameter adaptation within the wearable prenatal education device 100. They are not required to form a medical diagnosis conclusion, nor are they used to judge the fetal health status, disease status, or medical risks based solely on the local motion response.

[0217] Through the above implementation methods, the target stimulus data, actual stimulus execution data, stimulus mechanical coupling data, abdominal motion data, and maternal reference motion data generated by the same stimulus event can be organized under a common event identifier and a common time reference. The effective stimulus state generated during the stimulus execution state determination process and the stimulus mechanical interference reference further participate in the response determination process, thereby creating a data dependency between stimulus execution state determination and abdominal response determination, rather than two independent detection processes.

[0218] Therefore, this implementation can, on the one hand, form an effective stimulus state distinct from the target stimulus command based on actual output feedback and wear coupling state; on the other hand, it can form a stimulus-related effective response by combining the parent body reference motion and the mechanical interference reference obtained from the stimulus execution process, and further control subsequent stimulus events based on the stimulus-response pairing relationship formed by the two. Thus, while reducing the interference of the overall parent body motion and the mechanical output of the stimulus device itself on response detection, it can distinguish between two states: insufficient stimulus execution and insufficient response under effective stimulus conditions, enabling the adaptive control of acoustic and optical stimulation to be established on a closed-loop relationship between the actual stimulus execution state and the corresponding response.

Claims

1. A method for adaptive control of acoustic and optical stimulation in a wearable prenatal education device, characterized in that, include: Determine the stimulus event data corresponding to the current stimulus event, wherein the stimulus event data includes at least the event identifier, the stimulus reference time, and the target stimulus parameters; Based on the stimulus event data, control at least one of the acoustic stimulation component and the light stimulation component to execute the current stimulus event, and collect stimulus coupling data corresponding to the current stimulus event. Determine the effective stimulus state of the current stimulus event based on the target stimulus parameters and the stimulus coupling data. Based on the stimulus event data, a response observation interval corresponding to the current stimulus event is established. Within the response observation interval, multiple abdominal motion signals and maternal reference motion signals are collected. Based on the maternal reference motion signals, the overall maternal motion component in the abdominal motion signals is at least partially suppressed. Based on the stimulus coupling data, a stimulus interference reference related to the operation of the stimulus component is formed, and the stimulus interference component in the abdominal motion signal is at least partially suppressed based on the stimulus interference reference to determine an effective response corresponding to the current stimulus event. Establish a stimulus-response pairing relationship between the effective stimulus state and the effective response based on the event identifier; as well as The stimulus parameters for subsequent stimulus events are determined based on the stimulus-response pairing relationship.

2. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, The stimulation coupling data includes at least one of contact data characterizing the contact state between the stimulation component and the abdomen and stimulation feedback data characterizing the actual output state of the stimulation component; the effective stimulation state includes at least one of effective acoustic stimulation characterization, effective light stimulation characterization, and stimulation coupling confidence.

3. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, When performing acoustic stimulation, the stimulation interference reference is formed based on at least one of the stimulation feedback data and contact data corresponding to the acoustic stimulation component, and the stimulation interference component in each abdominal motion detection channel is determined based on the stimulation interference reference and the coupling relationship between the acoustic stimulation component and different abdominal motion detection channels.

4. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, Determining the effective response includes: determining the overall maternal motion component in each abdominal motion detection channel based on the maternal reference motion signal; removing at least part of the overall maternal motion component and the stimulus interference component from the corresponding abdominal motion signal; and identifying local motion events based on at least one of the amplitude, energy, duration, inter-channel temporal relationship, and spatial distribution of the processed multiple abdominal motion signals.

5. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, The response observation interval is determined based on the stimulus reference time and the stimulus duration parameter of the current stimulus event, and the effective response is associated with the event identifier; when the response observation intervals corresponding to different stimulus events overlap, the response confidence of local motion events that cannot be reliably attributed to a single stimulus event is reduced or they are not used to update the stimulus-response pairing relationship.

6. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, When no valid response that meets the conditions is determined, the current stimulus event is judged to be either in a state of insufficient stimulus execution or a low response state under valid stimulus based on the state of valid stimulus. For the state of insufficient stimulus execution, the stimulus output level of subsequent stimulus events is restricted from being increased based on the failure to determine a valid response. For the state of low response under valid stimulus, at least one of the following is changed: the sound-light combination relationship of subsequent stimulus events, the stimulus timing, the stimulus duration, and the stimulus output level.

7. The adaptive control method for acoustic and optical stimulation according to claim 1, characterized in that, The stimulus-response pairings corresponding to multiple stimulus events are used to form historical stimulus-response data, which is classified at least according to the stimulus type among sound stimulus, light stimulus, and combined sound and light stimulus. The response evaluation results of the candidate stimulus events are determined based on the expected effective stimulus state of the candidate stimulus events and the historical stimulus-response data, and the subsequent stimulus events are determined from the candidate stimulus events that meet the preset stimulus constraints.

8. A wearable prenatal education device, characterized in that, include: Wearing main body; Acoustic stimulation component and light stimulation component disposed on the wearable body; A stimulus coupling detection component is used to obtain stimulus coupling data related to the stimulus execution state of the acoustic stimulation component and / or the optical stimulation component; An abdominal motion detection component, comprising multiple abdominal motion detection units for acquiring multiple abdominal motion signals; A reference motion detection component is used to obtain the maternal reference motion signal; as well as The control component is communicatively connected to the acoustic stimulation component, the optical stimulation component, the stimulation coupling detection component, the abdominal motion detection component, and the reference motion detection component; The control component is configured to determine an effective stimulus state and an effective response corresponding to the same stimulus event, form a stimulus interference reference for determining the effective response based on the stimulus coupling data, establish a stimulus-response pairing relationship between the effective stimulus state and the effective response, and control subsequent stimulus events based on the stimulus-response pairing relationship.

9. The wearable prenatal education device according to claim 8, characterized in that, The stimulation coupling detection component includes a contact detection element and a stimulation output feedback detection element disposed in the corresponding area of ​​the acoustic stimulation component and / or the optical stimulation component; the contact detection element is used to obtain a contact signal characterizing the local contact state between the wearable body and the abdomen, and the stimulation output feedback detection element includes at least one of an acoustic output feedback detection element and an optical output feedback detection element.

10. The wearable prenatal education device according to claim 8, characterized in that, The control component includes a processor, a machine-readable storage medium, and a synchronization clock unit, the synchronization clock unit being used to map stimulus execution data, stimulus coupling data, abdominal motion signals, and maternal reference motion signals to a common time reference; the machine-readable storage medium stores instructions that, when executed by the processor, cause the control component to implement the acoustic-optical stimulation adaptive control method according to any one of claims 1 to 7.

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