80 results about "Head position" patented technology

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.

The utility model relates to the field of medical instruments, in particular to an abnormal head position detection device, which comprises a head-mounted frame, a sensor module, a display module and a power supply module, the head-mounted frame is used for bearing the sensor module, the display module and the power supply module; the sensor module is used for detecting the deflection angle of the head position, and the sensor module is connected with the display module; the display module is used for displaying the head position inclination angle detected by the data detected by the sensor module; the power supply module provides power for the sensor module and the display module. The head position monitoring device is convenient for a user to self-detect an abnormal head position condition, is simple in structure and convenient to use, can be used in various scenes, and has relatively high accuracy of a monitoring result; and the structural design is comfortable, so that the burden and discomfort of a user are reduced.

The invention relates to the technical field of TWS earphone low-delay audio processing methods, in particular to a TWS earphone low-delay audio processing method based on head motion prediction, which comprises the following steps: S1, collecting head motion parameters of a user, the head motion parameters comprising a head posture theta, a head rotation angular velocity omega, a head movement direction phi and a head movement velocity V; s2, establishing a relation model between the head motion parameters and the audio time delay; s3, predicting head motion parameters in a future time period based on a recurrent neural network; s4, according to the predicted head motion parameters, audio time delay is calculated, and audio rendering is carried out; s5, outputting the audio signal subjected to time delay compensation; wherein the steps from S2 to S5 are executed circularly so as to adjust audio output in real time; head motion prediction is carried out by using the recurrent neural network, and the head position and the motion trend of the user can be accurately estimated in a millisecond level, so that audio pre-rendering and accurate output are realized.

The invention provides an eye muscle derived compensatory head position auxiliary identification device based on instantaneous eye movement capture, and relates to the technical field of medical instruments, the eye muscle derived compensatory head position auxiliary identification device comprises a rotary video playing module, a skeletal muscle key point capture module, a capture module and a photo output module; the detected person watches the video, the video rotates in the reverse direction from the compensatory head position to the horizontal position, if the head position at the horizontal position is not improved, the video rotates towards the compensatory head position, in the rotating process, skeletal muscle key points capture the opposite sides of face and neck key points of the detected person and the head position is digitized, a capture module is started, photos are automatically captured, and eye position abnormity is analyzed through the photos; when eye position abnormity exists in the snapshot image, the snapshot image can be determined as an eye muscle source compensatory head position, and when the head position improvement is not obvious, one eye of the examiner is covered, and the other eye continues to watch the video. And the detected person watches the video, and after the video stops rotating, the head position and the fixation point are kept stable until the photo is automatically captured. When the head position of the snapshot image is improved, the head position can be clearly determined as the eye muscle-derived compensatory head position.

The invention relates to the technical field of ophthalmologic operations, and provides an intelligent head position recognition and correction system in ophthalmologic operations, comprising: an intelligent pillow which is designed according to human head engineering, is provided with a self-adaptive adjustment module, and is used for performing automatic fine adjustment according to head contours and body types of different patients to ensure that the heads of the patients are stably supported; the infrared eyeball tracker is installed on a mechanical arm beside an operating bed, the infrared eyeball tracker is composed of a high-sensitivity infrared emitter, a wide-view-angle receiver and a matched optical filter, and the infrared eyeball tracker can stably work in a complex light environment and accurately capture infrared signals reflected by eyeballs. Through the high-precision nine-axis inertial measurement unit integrated in the intelligent pillow, various fine actions such as translation, rotation and inclination of the head can be monitored accurately in all directions, and the measurement precision reaches the sub-millimeter level and the sub-degree level. Therefore, the system can timely and accurately obtain the head position change information, and a reliable basis is provided for subsequent judgment and processing.

The invention discloses a self-adaptive control method for a sound field of an in-vehicle sound box based on a head position, and the main design concept of the self-adaptive control method lies in that the dynamic optimization of the sound field in the vehicle is carried out by tracking the obvious change of the head position caused by the change of the sitting posture of a driver and passengers in real time, so as to adjust the output effect of a loudspeaker in the vehicle in a self-adaptive manner. Specifically, on the basis of real-time detection of the head position of a person in a vehicle, a control strategy is calculated according to a dynamic sound field: time delay is compensated to solve the time difference problem of sound wave propagation, and the dynamic accuracy of sound image positioning is ensured; through a gain compensation mode, sound pressure level differences of loudspeakers in a vehicle with dynamic different distances relative to the head of a user are balanced, and frequency response flatness is maintained; and through phase correction, phase interference generated by spatial position difference caused by head position change is eliminated, and sound field coherence is optimized. According to the invention, the follow-up adaptation effect of the person in the vehicle and the sound field in the vehicle is realized, and the acoustic quality in the vehicle is obviously improved.

The invention belongs to the technical field of medical instruments, and discloses a neurosurgery head frame capable of achieving image recognition and position adjustment and a using method, and the neurosurgery head frame comprises a supporting base, a head supporting ring and a plurality of fixing head nail suites; the top end of a vertical plate of the supporting base is provided with an arc-shaped groove sliding way which is arranged in an inwards-concave mode, a plurality of fixing head nail sets are detachably installed on one side face of the head supporting ring in the circumferential direction of the head supporting ring and can abut against and make contact with the head of a patient to fix the head, and the head supporting ring is installed on the arc-shaped groove sliding way in a sliding mode. The head supporting ring and the arc-shaped groove slide way are locked through a locking screw, the rotation angle of the head supporting ring in the arc-shaped groove slide way can be adjusted by unscrewing the locking screw, and then the head position rotation angle of the head is adjusted. The supporting base and the head supporting ring are provided with a plurality of identification point positions. The head frame can provide fixation of different head positions required by an operation, is suitable for various different head neurosurgery operations, and can quickly recognize the change of the head position through an image.

1. The name of the design product: the main body of the head limiter for sports training. 2. The use of the design product: the overall use of the product: the design product is a wearable sports training equipment and a sports performance improvement device. Specifically, it is a head positioning device for basketball and other sports training, which limits head movement in a physical way to prevent athletes from lowering their heads when dribbling. Local use of the product: main body of the head limiter. 3. The design points of the design product: the shape of the local part to be protected. 4. The picture or photo that best indicates the design points: perspective view.

A method for assessing hearing abilities of a human person having two cars, the method comprising: —providing two audio signals (S1, S2) to two respective car speakers (15, 16) at a person's corresponding cars; —measuring at least one value of at least one parameter (x15, y15, z15, x16, y16, z16) representative of the person's head position, adapting at least one of the two audio signals (S1, S2) based on the at least one measured value ((x15, y15, z15, x16, y16, z16), and repeating the measuring and adapting often enough for the sounds provided to the person to correspond to their actual head position; —detecting that the person has found their best perception of the two sounds; —calculating from the person's head position corresponding to the best perception an overall sensitivity value, a differential sensitivity value and / or a value of a latency shift of the person.

The present invention relates to methods, devices, and systems for dynamically adjusting mandibular advancement. In certain embodiments, the devices and systems employ actuator assemblies configured to allow a subject's lower jaw to be advanced by a minimum amount (e.g., trigged by obstructive sleep apnea (OSA) or associated significant oxygen saturations), but still allow the subject to move their jaw further forward, laterally, and open / close on their own. In some embodiments, the devices and systems employ an oxygen saturation measuring sensor linked to a motor control processor that: i) advances extending shafts forward when the oxygen saturation measuring sensor detects significant changes to oxygen saturation levels or other conditions that may signal OSA (e.g. a signal from another sleep monitoring device), and ii) retract the extending shafts backwards when the oxygen saturation measuring sensor detect normal oxygen saturation levels or other condition is met (e.g. elapsed time, head position, etc.).

A head tracking system HTS (100, 200) and associated method and head worn assembly, configured to determine a head position and / or a head orientation of a user, the HTS comprising: one or more optical sensors (112) producing optical measurements; and one or more inertial sensors (104) producing inertial measurements; a processor configured, when the optical sensors fail to provide optical measurements to determine the head location and the head orientation of a user, to operate in a coasting mode using the inertial measurements from the one or more inertial sensors to determine the head location and the head orientation of a user, the processor configured to further: determine a figure of merit FOM (346) for coasting errors based on a combination of one or more of errors in an estimated inertial sensor bias, a random drift and noise of the inertial sensor and the inertial sensor gain and alignment errors; compare (348) the FOM with a threshold to determine whether the inertial measurements provide a valid or invalid head location and / or head orientation; and determine a subsequent operation from a plurality of possible subsequent operations of the HTS based on whether the head location and / or head orientation is valid or invalid.

Provided is an analysis system for analyzing the function of a semicircular canal under rotational stimulation, which includes a vestibular ocular reflex data acquisition element for acquiring first vestibular ocular reflex data obtained by dividing a rotational angle amount of a vestibular ocular reflex by a head position rotational angle amount, and second vestibular ocular reflex data obtained by dividing a residual rotational angle amount obtained by subtracting, from the head position rotational angle amount, a rotational angle amount based on a compensatory saccade (CUS), and analyzing the function of a semicircular canal based on the second vestibular ocular reflex data, or the first vestibular ocular reflex data and the second vestibular ocular reflex data.

In a head-mounted device, a gaze-tracking sensor may measure a vergence angle associated with the user's eyes. The vergence angle may be used to determine the user's eye focus depth. Virtual content may be presented at a depth that is equal to the eye focus depth. When the depth of the virtual content is not equal to the eye focus depth, the virtual content may be shifted towards the eye focus depth. Once the depth of the virtual content is approximately equal to the eye focus depth, the depth of the virtual content may be locked. The depth of the virtual content may remain locked until one or more unlock criteria are met. The unlock criteria may be based on the vergence angle of the user's eyes, a head rotation, and / or a head position.

A device 1 for measuring the position of a head of a subject (2, fig 2) relative to a wall (3, fig 2) against which they are standing is positioned in contact with the wall 3 and includes at least two indicator zones 21, 22 for indicating whether the position of the tragus (7, fig 3A) of the subject 2 relative to the wall 3 corresponds to a normal head position (first indicator zone 21) or an abnormal head position (second indicator zone 22). The second indicator zone 22 may correspond to a forward head position. There may be a third indicator zone 23 corresponding to an extended neck position. The second and third indicator zones 22, 23 may be graded with numbers and / or colours 31-33, 41-43 to indicate the severity of the abnormal head position. The device 1 may include a base 10 with a wall abutment surface 8. The device may be used in a tragus to wall test (TWT) and may be used to generate a posture score.

1. The name of the design product: neck pillow (butterfly wings). 2. The use of the design product: the design product is used to fit the neck curve and provide support when sleeping or resting, relieve the pressure on the cervical spine by fixing the head position, and thus improve the quality of sleep. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

A method for using a mobile device and a mobile device for determining a person's viewpoint are provided. The method includes: determining the head position and pupil position of the person while they are looking at a target; and determining the viewpoint based on a surrogate of at least the eye portion of the person's head, the surrogate being set to the determined head and pupil positions. The method further includes generating the surrogate from the mobile device.

The invention discloses a method for judging jaw malformation based on facial soft tissue feature points, which comprises the following steps of: automatically positioning key feature points in a side face optical image by using a pre-trained neural network model, establishing a coordinate system, correcting the deviation of a head posture in the image, and pre-diagnosing the jaw malformation condition; in the model training stage, a face optical image and an X-ray image which are paired are used, common feature points are extracted to register soft tissue and a bony structure, a deep neural network is used for learning the space mapping relation of the face optical image and the X-ray image, a coordinate system error introduced by an optical photo posture is calculated, and a head position normalization neural network model is formed; in the application, only a single face optical image is input to the model, the pre-training model can automatically identify the feature points, posture calibration and space standardization are completed, and automatic classification and auxiliary diagnosis results of jaw malformation are output according to the posture calibration and the space standardization.

The present disclosure provides a method and a system for estimating the 3D head position of a driver in a vehicle. The method includes capturing an image of the driver and identifying an area of ​​interest focused on the driver's head within the image. Furthermore, a virtual camera perspective is created by generating a cropped image centered on the head position. The true coordinates of the head in the original image are then transformed to align with the perspective of the virtual camera. This alignment ensures that the coordinates in the virtual camera perspective accurately correspond to the driver's head position. Finally, a pre-trained estimation model is applied to the transformed, cropped image to determine the 3D position of the driver's head, enabling accurate, real-time monitoring of the driver's orientation and position.The method improves the accuracy of the estimation by standardizing head positioning in relation to the camera viewpoint, which is a basic requirement for driver assistance and safety systems.

The utility model discloses a medical prone position ventilation auxiliary device, and belongs to the technical field of medical instruments. The device mainly comprises a base and a head supporting assembly arranged on the base, a through hole is formed in the base, the base is an oval annular body, the head supporting assembly comprises two face supporting air bags arranged on the top face of the base, and a forehead supporting air bag is further arranged on the top face of the base. According to the medical prone position ventilation auxiliary device, the two faces of the human body are supported through the two face supporting air bags, the forehead part of the human body is supported through the forehead supporting air bag, and the positions of the faces on the two sides are adjusted by adjusting the amount of air in the face supporting air bags; the head is raised and lowered by adjusting the gas amount in the forehead supporting air bag, the situation that the face is pressed and hurt due to long-time face pressing is prevented, meanwhile, neck muscle strain caused by long-time fixing of the head position is avoided, the face supporting air bag and the forehead supporting air bag have a certain height, and sputum drainage is better facilitated.

A head tracking system (HTS) 200 and head worn assembly determines a user’s head position and / or orientation. The HTS comprises optical sensor(s) and inertial sensor(s) producing optical 210 and ine

The present application discloses a head position detection method, device and digital photography equipment. In the digital photography equipment, the head rotation assembly can move the generator, and emit radiation from various angles to the flat-panel detector assembly for exposure and image acquisition; and when the generator moves, the photoelectric sensor on it can receive light passing through the light-transmitting holes on the code disk of the head rotation assembly. In response to the shooting instruction; the head rotation assembly is controlled to make the generator move from the initial position toward the designated shooting position corresponding to the shooting instruction; the number of pulses of the photoelectric sensor is counted once when the high-level signal returned by the photoelectric sensor becomes a low-level signal, then by monitoring the change in the number of pulses of the photoelectric sensor, the position change of the generator relative to each light-transmitting hole can be determined, and then the current angle and position of the generator can be obtained; when the generator reaches the designated shooting position, the generator is controlled to perform exposure to shoot the target image.

Provided in the present disclosure are a driving state detection method and apparatus, an electronic device, and a readable storage medium. The method comprises: acquiring an image to be subjected to detection that includes the head of a driver; detecting a head image of the driver from the image to be subjected to detection, and on the basis of the head image, determining a head pose of the driver; detecting a facial region of the driver from the image to be subjected to detection; determining the number of occluded eye feature points and an eye image from the facial region; on the basis of the number of occluded eye feature points, determining whether the eye image can be used for gaze direction estimation; when the eye image can be used for gaze direction estimation, inputting the eye image into a gaze direction estimation model to determine a gaze direction of the driver; on the basis of the gaze direction, head position information and a head rotation angle of the driver, and position information of each region in a vehicle, determining a gaze region of the driver; and on the basis of the head rotation angle and the gaze region, determining a driving state of the driver. By means of the method, the accuracy of detecting a distracted state is improved.

An occupant state determination device (1) of the present disclosure includes a face detection unit (12), a feature detection unit (13), a reference posture estimation unit (14), a region determination unit (151) that performs region determination as to whether at least one of a face orientation and a head position of the occupant or a displacement amount of the at least one of the face orientation and the head position of the occupant from a reference posture is one of a first region, a second region, and a third region set in a real space, a posture collapse determination unit (152) that performs posture collapse type determination, a face change degree detection unit (153) that detects a change degree of the occupant's face, an error detection determination unit (154),which determines whether the posture of the occupant is a posture collapse type based on the detection result of the facial change degree detection unit (153), and a problem posture determination unit (155) which determines whether a problem posture of the driver exists based on at least one of the area determination result, the posture collapse type determination result, and the detection error determination result.

To provide an ophthalmologic apparatus capable of detecting a position of a measurement head with a space-saving and low-cost manner.SOLUTION: An ophthalmologic apparatus comprises: a head moving mechanism 13 that moves a measurement head 15 to a first position facing a first eye (a right eye ER) from an origin position and a second position facing a second eye (a left eye EL) from the origin position; an acceleration sensor 18 that moves integrally with the measurement head 15; a first calculation unit (head position calculation unit 38a) that calculates a first X position of the measurement head 15 based on an acceleration signal output from the acceleration sensor 18 while the measurement head 15 moves from the origin position to the first position; and a second calculation unit (head position calculation unit 38a) that calculates a second X position of the measurement head based on an acceleration signal output from the acceleration sensor 18 while the measurement head 15 moves from the origin position to the second position.SELECTED DRAWING: Figure 2

The application relates to the technical field of eye movement instruments, and discloses an autism eye movement track recognition instrument, which comprises an instrument base plate, a playing device is fixedly installed at one end of the instrument base plate, a head limiting mechanism is rotationally assembled at the other end of the instrument base plate, the playing device is used for playing materials, and an eye movement tracking camera for collecting the eye picture of a patient when the patient watches the materials is hiddenly installed on the playing device. The autism eye movement track recognition instrument limits the head position of the patient through the swingable head limiting mechanism, the swing of the head of the patient can reduce the uncomfortable feeling, the eye movement tracking camera is driven to move synchronously through a power transmission assembly, the eyes of the patient can be kept facing the camera during the test process, the eyes of the patient are prevented from deviating from the shooting range of the camera, and the eye movement tracking camera is prevented from moving and lagging behind when the head of the patient swings, so that the shooting of the eyes is not delayed, and the accuracy of collecting the eye movement track of the patient is ensured.

A display device is disclosed. One or more processors execute one or more instructions to: display a motion guide including a preset pose through a display; identify the head position of a user on the basis of an image acquired through at least one camera; identify a first distance from a display device to the head position; identify a preset point of the spine on the basis of a preset second distance downward from the head position; identify a first position of both hands of the user, corresponding to a preset pose, on the basis of distance information from at least one from among a plurality of motion controllers gripped by both hands through a communication interface; and display, through the display, a representation of both hands on the basis of the first position of both hands.

According to the end socket with the high sealing structure, the end socket inner sealing positioning ring groove and the end socket outer sealing positioning ring groove are formed in the end socket body part and the end socket positioning part respectively, so that a multi-layer sealing structure can be formed at the joint between the end socket and a container, and the sealing performance of the end socket is greatly improved. Due to the fact that the seal head body part and the seal head positioning part are fixed in a welding mode, the whole seal head is firmer in structure, not prone to leakage and easy to machine and produce.

The utility model relates to the field of pillows, in particular to a pressure sensing prone position operation face pillow which comprises a computer board, a face pillow body and a plurality of pressure sensors, the face pillow body is elastic, and a first receding groove and a second receding groove which are concave in the thickness direction of the face pillow body are formed in the middle of the face pillow body. The length direction of the first avoiding groove is parallel to the width direction of the face pillow, and the length direction of the second avoiding groove is parallel to the length direction of the face pillow; when the head of the patient lies on the face pillow, the first avoiding groove is used for avoiding the eyes, and the second avoiding groove is used for avoiding the mouth and the nose; the multiple pressure sensors are arranged in the face pillow at intervals, and the pressure sensors are in signal connection with the computer board. The pressure on the face of a patient can be monitored, so that medical staff can conveniently adjust the head position of the patient.

A flight simulation mixed reality display system comprises a physical simulation cockpit, a head position measurement system, a virtual scene generation system and a see-through VR glasses; the head position measurement system is used to collect the head posture position coordinates of a trainee, and comprises a six-degree-of-freedom inertial module and a three-degree-of-freedom infrared measurement module. The virtual scene generation system corresponds the cockpit in the virtual scene established by the virtual scene generation system to the three-dimensional digital model of the cockpit, and corresponds the head position of the trainee in the virtual scene established by the virtual scene generation system to the head posture position coordinates; the see-through VR glasses reflects the virtual scene on the virtual scene display screen through a concave semi-transparent half-mirror. The real scene of the illuminated physical simulation cockpit is transmitted through the concave semi-transparent half-mirror, so as to realize the superposition of the virtual scene and the real scene. The above structure can effectively solve the problem of the flight simulation mixed reality display system in the prior art, poor training effect and the inability to truly simulate the flight training effect.

The invention discloses a double-person interactive gazing behavior recognition and mode conversion positioning method, which comprises the following steps of: 1, specifying the head positions of to-be-detected double target persons in an input video, and respectively acquiring a gazing point heat distribution map, a gazing direction vector and a drop point label sequence through a gazing point heat map generator; and step 2, using a deep feature extractor of a cross attention mechanism, and fusing related information to extract gaze behavior features. 3, designing a multi-scale gaze mode recognizer, extracting gaze behavior feature relevance on multiple time scales, and obtaining a gaze behavior recognition result after decoding; 4, designing a mode conversion locator, learning inter-frame difference characteristics, and obtaining the probability of a conversion point at each moment; and a fifth step of constructing a loss function in combination with double tasks of double-person watching behavior recognition and mode conversion positioning, and completing training of the constructed deep learning network. According to the method, through multi-scale time sequence feature fusion and a double-task joint training strategy, excellent performance is shown in double-person watching behavior recognition and mode conversion positioning tasks.