The systems and methods may transmit a plurality of locationing pulse requests from a mobile device in a vehicle to an audio system of the vehicle during a period of operation of the vehicle. The audio system may have an array of speakers disposed inside the vehicle, and the locationing pulse requests may include a request to emit a locationing pulse from the array of speakers. The systems and methods may further receive the locationing pulse at a microphone of the mobile device; and generate or update a vehicle usage profile based upon the receiving operation. The vehicle usage profile may include occupancy data of one or more seats inside the vehicle. The systems and methods may further transmit a recommendation to a person associated with the mobile device. The recommendation may be based upon the vehicle usage profile, and may relate to vehicle operation or insurance.

Systems and methods may transmit a plurality of locationing pulse requests from a mobile device in a vehicle to an audio system of the vehicle during a period of operation of the vehicle. The audio system may have an array of speakers disposed inside the vehicle, and the locationing pulse requests may include a request to emit a locationing pulse from the array of speakers. The systems and methods may receive the locationing pulse at a microphone of the mobile device, and further determine, based upon the locationing pulse received at the microphone, that non-driver passengers were inside the vehicle for part of the period of operation of the vehicle. The systems and methods may determine an identity associated with each of the non-driver passengers, and subsequently transmit a request to share costs of the vehicle during the period of operation of the vehicle to the mobile device.

Time of flight between two or more ultrasonic transceivers is measured using known delays. First and second transceivers are duty cycled, each having a respective receive period that is less than a measurement period during which the transceivers are configured to receive transmissions. An ultrasonic trigger pulse is transmitted by the first transceiver. The second transceiver, upon receiving the trigger pulse, transmits an ultrasonic response pulse after a first predefined delay time that is known to the first transceiver and greater than the receive period of the second transceiver. Subsequently, the first transceiver receives the ultrasonic response pulse and determines a receive time. The first transceiver determines the distance between the first transceiver and the second transceiver from a speed of sound, an elapsed time between the time of transmission of the trigger pulse and the receive time, and the first predetermine delay time.

In a distance estimating system, a first terminal transmits a response request signal and successively transmits impulse signals as synchronization signals, and a second terminal receives the response request signal, generates response data based on the response request signal, shifts a bit, which is a transmission target in a bit string as the response data, by one toward a rear side from a leading bit to a trailing bit each time the synchronization signal is received, transmits the impulse signal in a case where a value of a bit that is a transmission target at a time of reception of the synchronization signal is a predetermined value. The first terminal further measures a round-trip time, specifies a flight time of the impulse signal, and estimates a distance to the second terminal based on the flight time and a propagation velocity of the impulse signal.

In a distance estimating system, a first terminal transmits a response request signal and successively transmits impulse signals as synchronization signals, and a second terminal receives the response request signal, generates response data based on the response request signal, shifts a bit, which is a transmission target in a bit string as the response data, by one toward a rear side from a leading bit to a trailing bit each time the synchronization signal is received, transmits the impulse signal in a case where a value of a bit that is a transmission target at a time of reception of the synchronization signal is a predetermined value. The first terminal further measures a round-trip time, specifies a flight time of the impulse signal, and estimates a distance to the second terminal based on the flight time and a propagation velocity of the impulse signal.

Systems and methods for positioning objects in underwater environments are provided. The geolocation of a target for an object is determined, and a light source provided as part of a positioning system is operated to project a visible target at that location. The determination of the target location relative to the positioning system can include determining a location of the positioning system using information obtained from a laser system included in the positioning system. The light source used to project the visible target can be the same as a light source included in the laser system. A location of an object relative to the target location can be tracked by the laser system as the object is being moved towards the target location. The described methods and systems utilize one or more non-touch subsea optical systems, including but not limited to laser systems, for underwater infrastructure installation, measurements and monitoring.

Systems and methods for positioning objects in underwater environments are provided. The geolocation of a target for an object is determined, and a light source provided as part of a positioning system is operated to project a visible target at that location. The determination of the target location relative to the positioning system can include determining a location of the positioning system using information obtained from a laser system included in the positioning system. The light source used to project the visible target can be the same as a light source included in the laser system. A location of an object relative to the target location can be tracked by the laser system as the object is being moved towards the target location. The described methods and systems utilize one or more non-touch subsea optical systems, including but not limited to laser systems, for underwater infrastructure installation, measurements and monitoring.

A control method of an electronic device system for diving is provided. The control method includes steps of sending a positioning request signal to the slave device; receiving a feedback signal sent by the slave device, the feedback signal is generated by the slave device responding to the positioning request signal, the feedback signal includes water pressure data; according to the time difference between the sending time of the positioning request signal and the receiving time of the feedback signal, and the signal transmission speed, the relative distance with the slave device is calculated; obtaining the relative direction between the slave device and the master device according to the incoming direction of the feedback signal received by the ultrasonic receiver; calculating the relative depth with the slave device according to the water pressure data in the feedback signal. Furthermore, an electronic device and system for diving are also provided.

A method for finding door location in an automated way based on observations of people that are equipped with a device whose position is determined acoustically. By observing positioning transitions across internal structures such as walls, the location of doors can be automatically identified.

A control method of an electronic device system for diving is provided. The control method includes steps of sending a positioning request signal to the slave device; receiving a feedback signal sent by the slave device, the feedback signal is generated by the slave device responding to the positioning request signal, the feedback signal includes water pressure data; according to the time difference between the sending time of the positioning request signal and the receiving time of the feedback signal, and the signal transmission speed, the relative distance with the slave device is calculated; obtaining the relative direction between the slave device and the master device according to the incoming direction of the feedback signal received by the ultrasonic receiver; calculating the relative depth with the slave device according to the water pressure data in the feedback signal. Furthermore, an electronic device and system for diving are also provided.