Wearable electronic devices that are designed to be worn on the head of a user while the user is swimming can determine swimming strokes and swimming performances of the user accurately using motion sensors. Using a sound speaker, the wearable electronic device can play music and provide audio feedback to the swimmer. By comparing the swimming performance of the swimmer wearing the device with previously recorded swimming data, the wearable electronic device can provide audio comparison results to the swimmer while the swimmer is swimming in water. The wearable electronic device can also support similar functions for other sports and physical activities.

A system includes a minimally intrusive display system (MIDS) configured to be disposed on an eyewear. The MIDS includes a display system and a sensor system configured to provide for a sensor data. The MIDS further includes a processor configured to process the sensor data to derive an activity metric. The processor is further configured to display, via the display system, the activity metric, wherein the display system is disposed in the eyewear so that the activity metric is only viewed when a user of the eyewear turns the user's pupil towards the display system at angle from a forward direction.

A system includes a minimally intrusive display system (MIDS) configured to be disposed on an eyewear. The MIDS includes a display system and a sensor system configured to provide for a sensor data. The MIDS further includes a processor configured to process the sensor data to derive an activity metric. The processor is further configured to display, via the display system, the activity metric, wherein the display system is disposed in the eyewear so that the activity metric is only viewed when a user of the eyewear turns the user's pupil towards the display system at angle from a forward direction.

A system includes a minimally intrusive display system (MIDS) configured to be disposed on an eyewear. The MIDS includes a display system and a sensor system configured to provide for a sensor data. The MIDS further includes a processor configured to process the sensor data to derive a physiological measure. The processor is further configured to display, via the display system, the physiological measure, wherein the display system is disposed in the eyewear so that the physiological measure is only viewed when a user of the eyewear turns the user's pupil towards the display system at angle from a forward direction.

Swimming goggles are developed to allow a swimmer to see the end of the pool without moving their head while swimming in backstroke. Using a light reflector, a swimmer can see through a backstroke viewing window, allowing them to see along the direction that they are moving when swimming backstroke. Using a motion sensor and electric control circuits, a swimming goggle can provide optimum views for the swimmer wearing the swimming goggle. Using a sound speaker, a swimming goggle can play music and provide voice reports to the swimmer. The electronic controller for a swimming goggle can either be embedded as part of a swimming goggle, or can be detachable to support more than one swimming goggle.

Provided is a pair of goggles with replaceable lenses, including a main frame body, at least one lens, a secondary frame body, a soft frame body and at least one fastener. The at least one fastener is pivoted when the at least one lens is replaced. The main frame body and the secondary frame body are separated such that the at least one lens is removed. Moreover, when the at least one lens is assembled, the main frame body and the secondary frame body are respectively provided with a pair of grooves, the pair of grooves holds and fix the soft frame body, and the main frame body and the secondary frame body are held by the at least one fastener so that the at least one lens is fixed inside the soft frame body.

A swimming goggles storage assembly for storing and drying swimming goggles includes a canister that has a plurality of drain holes therein to drain a fluid from the canister. A lid is removably positioned on the canister to close the canister. The lid has a plurality of drain apertures therein to pass the fluid therethrough when the lid is positioned on the canister. A pair of swimming goggles is provided and the swimming goggles are inserted into the canister after the swimming goggles are worn in water for storage. The drain holes in the canister and the drain apertures in the lid facilitate the swimming goggles to dry in the canister.

A waterproofed wearable displaying device with an augmented reality function. The wearable displaying device is in form of goggles. A waterproofer is attached in front of a lens of the goggle. A receiving space defined between the waterproofer and the lens is sealed. The wearable displaying device further includes an image capturing device and a display in the receiving space. When the user wears the wearable displaying device indoors or outdoors, the display faces to the user's eyes, and modules in the device can detect air pressure and humidity in the goggles, to maintain air pressure within the goggles at a slight vacuum compared to the air pressure outside.

Provided are underwater spectacles, including a spectacle holder, spectacle belts and an intelligent control system. The intelligent control system includes a warning device, a microprocessor and a plurality of radars. The plurality of radars are respectively disposed on the spectacle holder and the spectacle belts. Input ends of the microprocessor are respectively connected with the plurality of radars, and an output end of the microprocessor is connected with the warning device. The microprocessor acquires signals of the radars, determine obstacle information and/or danger avoiding information around the head of a user, and send the information to the warning device. The warning device receives and provides the user with the obstacle information and/or the danger avoiding information. A control method of the underwater spectacles is also provided.

Methods for providing swimmers with performance metrics, turn detection, and stroke rate detection are disclosed. An example method comprises mounting a wearable device comprising an accelerometer, gyroscope and processor on a swimmer's head, continuously measuring acceleration using said accelerometer and angular velocity using said gyroscope to provide acceleration and angular velocity signals to said processor, processing said acceleration and angular velocity signals to determine first roll and pitch angles, applying a correction to axes of said gyroscope based on said roll and pitch angles to determine corrected angular velocity signals, initializing a heading angle at a pre-defined, non-zero value, integrating said corrected angular velocity signals over a time window to determine changes to the heading angle, determining maximum and minimum heading angles within the time window, and, recording a turn when a difference between the maximum and minimum heading angles within the time window is at least approximately 180 degrees.