A method for alerting a user on an electronic device is described. The method includes identifying a signal at an ultrasound transmission frequency received at a first electronic device from a second electronic device. Further, the method includes receiving timing information corresponding to an exchange of an ultrasound transmission between the first electronic device and the second electronic device. Furthermore, a first distance value between the first electronic device and the second electronic device is computed by performing a time of flight estimation using the timing information. Furthermore, the first distance value is refined by using an output of a machine learning model to determine a second distance value. Furthermore, the method includes generating an alert based on the comparison of the second distance value with a predefined threshold distance value. In some examples, the alert can be indicative of a violation of a physical distancing norm in an environment.

A wearable device and a system for tracking the wearable device may enhance safety and peace of mind for a parent or caretaker of a child or other individual. The system may include a computing device, such as a smartphone, executing an application that provides alerts based on a distance between the computing device and the wearable device exceeding a threshold distance, based on the wearable device crossing a define geographic boundary, or one or more similar triggers. The wearable device may include an input button that allows a user of the wearable device to send a signal to the computing device of the parent or caretaker. An alert on the computing device might be disabled by pressing the input button on the wearable device.

An alert system to assist in child safety in a vehicle includes a seat belt buckle insert adapted to be inserted between the male and female parts of a standard safety belt found in most automobiles or for a child car safety seat. It may also include a portable receiver device designed to be carried by a vehicle operator. The seat belt buckle insert detects whether the seat belt has been buckled and the temperature is within an acceptable range, as well as the approximate distance between the seat belt buckle insert and portable receiver device. The seat belt buckle transmits information gathered to the portable receiver device and triggers alerts notifying the vehicle operator of a child's safety status.

A child tracking device including a wrist watch lockable onto a child's wrist in operational communication with a remote monitoring receiver unit with a liquid crystal display (hereinafter “LCD”) screen and a remote mobile device, such as a cellular phone, via a software application to continuously track a child's location and to provide an alert in the event the child strays a pre-set distance from either the remote monitoring receiver unit or the remote mobile device or leaves a designated geographical zone.

A wearable device and a system for tracking the wearable device may enhance safety and peace of mind for a parent or caretaker of a child or other individual. The system may include a computing device, such as a smartphone, executing an application that provides alerts based on a distance between the computing device and the wearable device exceeding a threshold distance, based on the wearable device crossing a define geographic boundary, or one or more similar triggers. The wearable device may include an input button that allows a user of the wearable device to send a signal to the computing device of the parent or caretaker. An alert on the computing device might be disabled by pressing the input button on the wearable device.

A wireless terminal detection system provided with user position information acquisition means for measuring a position of a reception-side wireless terminal; pattern classification means for classifying movement patterns extracted from position history information of the reception-side wireless terminal into ordinary patterns and non-ordinary patterns based on classification results in which the movement patterns are classified in accordance with times and positions; and determination means for determining whether a transmission-side wireless terminal, which is a transmission source of radio waves received by the reception-side wireless terminal, is a suspicious terminal based on a reception history of radio waves from the transmission-side wireless terminal in time intervals classified as the non-ordinary patterns.

An electronic patient monitoring system and method of operation that includes one or more generally non-metal, tamper-resistant patient identification and monitoring devices, an observer transmitter/receiver device configured to receive and detect one or more beacon signals that exceed a predetermined threshold from at least one of the not easily removable patient identification and monitoring devices, set a time to hold open a window for a response on the transmitter/receiver device, and send a request for information to the observer with the transmitter/receiver device, and a central computer system. Each of the transmitter/receiver device and the central computer system, including, at least, a computer processor, communications components and system software to communicate with the observer transmitter/receiver device at specified/predetermined time intervals to receive observer- and patient-specific information.

A system for alerting a user when a preset distance between any of a plurality of wireless transceiver devices or a secondary client device such as a smartphone is achieved. Each of the wireless transceiver devices are pairable to each other and to the secondary client device. Each of the wireless transceiver devices may be placed on or worn by a person or object to be tracked. Once a preset distance is achieved between any of the wireless transceiver devices or between any of the wireless transceiver devices and the secondary client device, each of the wireless transceiver devices is configured to alert the user that the preset distance was breached. The system may employ a software application for coordinating the system and tracking separation and other related data collected by each of the wireless transceiver devices.

A method for monitoring and reporting personnel social distancing practices using a small personnel monitoring and alerting device incorporating ultrasonic sensors to monitor a complete 360-degree field of view around each wearer in the workplace. The monitoring and alerting devices monitor the distance between personnel wearing the device at preset time intervals using ultrasonic sensors and provides an individual alert (visual, buzzer, and/or vibration) to any wearers that are encroaching within a preset distance of another person wearing the device. Device reports via a RF network to a second device and/or centralized data center on each encroachment and unencroachment event.

A rescue system identifies and rescues a protection target, using information from a camera. The rescue system includes: a plurality of movable bodies each equipped with a camera; and a server configured to communicate with the plurality of movable bodies. The server is configured to (a) identify the protection target, using movable-body information from the plurality of movable bodies, and (b) provide a protector of the protection target with notification about positional information on the protection target, when the protection target is identified and a position where the protection target is detected is out of a predetermined range.