Abstract: An anti-abduction system and method is disclosed which utilizes a radio frequency transceiver attached to a slave to communicate with a corresponding master transceiver to detect and prevent abductions, which may be advantageously applied to situations in which child abduction is a possibility. The disclosed system and method utilizes communication protocols to notify the master of the proximal locality of the slave unit and any spatial deviation of the slave from the master. Utilization of varying strength transceiver signaling between the master and slave permits the distance between the master and slave to be approximated. Additionally, the slave may contain an optional heartbeat monitor to detect and report situations in which the device is removed from the potential abduction victim.

Abstract: A weight-sensitive mat or other sensor determines whether a child seat in a vehicle is occupied, a transmitter is proximate to the sensor, and a keychain fob or other portable unit includes a receiver and an alarm. Generally, if the child seat is occupied and the keychain fob is removed from proximity to the transmitter, the transmitter communicates this to the keychain fob receiver and the alarm is activated. Exemplary embodiments include an add-on kit including a base unit with a transceiver for use with existing car seats having a base and a detachable shell, an add-on kit without the base unit for use with existing unitary car seats, and a car seat with the child sensor, transmitter, and/or base unit built into it.

Abstract: A vehicle locating system, comprising a hand-held transponder in communication with a vehicle-installed transponder. The hand-held transponder is carried by a user upon exiting a vehicle. The vehicle-installed transponder remains within the vehicle. The hand-held transponder includes an activation signal generator and a homing signal receiver. Correspondingly, the vehicle-installed transponder includes an activation signal receiver and a homing signal generator. Upon receipt of an activation signal from the hand-held transponder, the homing signal generator emits a homing signal which is detected by the homing signal receiver located within the hand-hold transponder.

Abstract: A method of generating a warning signal for a walkie-talkie includes: providing a detector and a timer; using the timer to count time; using the detector to determine whether the strength of a radio frequency (RF) signal which includes a standard CTCSS tone received by the walkie-talkie is larger than a predetermined value; using the detector to determine whether the strength of a RF signal which includes a non-standard CTCSS tone received by the walkie-talkie is larger than the predetermined value; if so, resetting the timer; and issuing a warning signal when the time counted by timer reaches a predetermined time.

Abstract: Individuals who carry personal transmitters in a particular area are remotely monitored so that such individuals may indicate an emergency. In the event of an emergency (or other event), the individual may activate his or her personal transmitter. The signal sent by the transmitter is then detected by an array of sensors. The sensors are capable of determining a signal strength of the signal from the personal transmitter. A computer console is coupled to the sensors to receive the signal strength indications. The computer console is capable of calculating a location (e.g., within an area of uncertainty around a point location) of the transmitter based on the received signal strengths determined by one or more of the sensors. Emergency services may then be contacted and dispatched automatically or depending on a set of expert rules or depending on user input.

Abstract: A monitoring system uses a portable master unit and at least one portable slave unit. The master unit provides an electrical circuit including an antenna, an RF signal amplifier, an RF signal tuner, a countdown timer, an attenuator, an adjustable delay timer, an AND gate and an audible alarm. Each of the slave units providing a slave circuit including a transmitter with transmitting antenna and an RF pulse generating circuit. The master unit is adjusted for receiving RF energy transmitted by a slave unit when the units are separated by a target distance or less. A time delay parameter is set using dual timers so that the slave may be positioned beyond the allowable distance parameter for a pre-selected duration before the alarm is triggered.

Abstract: The present invention relates to an alarm system (10) for preventing loss or theft of a portable and/or movable device (14; 12). The alarm system (10) comprises a first portable and/or movable device 814) provided with a first communication means (18) operable to communicate wireless with another communication means, a second portable and/or movable device (12) provided with a second communication means 816) operable to communicate wireless with another com-munication means. At least one of said first and second communication means (18, 16) is configured to generate an alarm signal when a distance (D) between said first and second communication means (18, 16) exceeds a predetermined distance (d).

Abstract: The invention concerns a system for monitoring an occupancy area (15.1-15.3). The system includes the following elements. A device (10) that is arranged in connection with the monitored party (A-D) which device (10) includes localizing means (12), means of communication (13) for communication in a wireless data communication network (20.1-20.3), a processor unit (MCU) and a storage medium (16), wherein at least location information (23-25) defining the limit of the said occupancy area (15.1-15.3) is arranged, based on which the current status information of the monitored party (A-D) is adapted to be defined. A terminal equipment (22) that is arranged in connection with the monitoring party (21), and a wireless data communication network (20.1-20.3) as a means of communication between the said device (10) and the terminal equipment (22). The said location information (23-25) defining the occupancy area (15.1-15.

Abstract: A system and method use a wireless tether comprising a transmitter and a receiver to alert a caregiver that an object has been left unattended. A detector senses the presence of the object, usually a child, located in a position such as a safety seat. The detector is operatively coupled to the transmitter, which is located near the object. The transmitter transmits at least one wireless signal when the object is in the position. The receiver, which is remotely located from the transmitter, senses the at least one signal as long as the receiver is within a prescribed range of transmission. By performing a timing function, the receiver monitors the proximity of the caregiver, who maintains possession of the receiver, to the transmitter. The system communicates an alarm to the caregiver when the caregiver ventures outside the range of transmission without having removed the object from the position.

Abstract: Card-type anti-miss/anti-theft alarm device including a portable mainframe and an alarm sub-frame each having a central processing/controlling unit and a power supply unit. One of the portable mainframe and alarm sub-frame includes an intermittent oscillating transmission unit, while the other includes a signal receiving unit and a sonic/optical warning unit. The alarm sub-frame is designed as a thin card with a dimension smaller than or equal to that of an existent credit card, whereby the alarm sub-frame can be easily placed and hidden in an article carried by a user. In case the user misses the article or the article is stolen by a thief and spaced from the user by a certain distance, at least one of the portable mainframe and the alarm sub-frame can emit an alarm to indicate the user of the location of the missing article. Accordingly, the user can easily find the article and the thief is scared.

Abstract: A position movement alarm system using GPS satellites and a cellular phone system is used to transmit automatically and directly a fact of movement of a movable goods from its original position, when the goods is moved opposing to the intension of an owner of the goods due to any reasons, from a position information monitor•alarm terminal (child device) 4 installed in the movable goods to owners cellular phone terminal (parent device) 2 having a GPS position information processing function through no third person organization such as an alarm center and a service center and the like.

Abstract: Disclosed is a system for determining if a human being, object or animal has moved beyond a predetermined radius. The system includes a base station, and at least one slave associated with the base station. Each of the slaves is located on the human being, object or animal, and each slave is adapted to receive and emit a coded signal at predetermined intervals. The base station is adapted to transmit and receive the coded signal, decode the coded signal and, if the coded signal represents a slave associated with the base station, determine a signal strength of the coded signal, the signal strength of the coded signal indicating that the human being, object or animal has moved beyond a predetermined area if the signal strength is below a predetermined threshold.

Abstract: A tire pressure monitoring device, being installed in a motor vehicle having a plurality of tires, includes: a plurality of sensor modules being installed onto the tire and having a wireless communication signal transmitter for transmitting a radio frequency (RF) signal. The RF signal includes a specific code for the status of the tire and a specific code for the sensor module. The device further includes a plurality of antenna modules, each being installed individually for one of the sensor modules for receiving the signal; and a receiving device, electrically coupled to the antenna module for processing the signal.

Abstract: The present invention relates to a personal property alarm system for monitoring the security of personal property using two-way coded radio signalling. The system comprises an alarm unit to be fixed to an item of property to be protected and a personal unit to be carried by a property owner. The alarm unit and the personal unit each comprise a transceiver to transmit and receive signals between each other. The alarm unit also comprises a motion sensor that is activated by predetermined movement of the property. The personal unit is operable in an alarm mode in which an alarm is activated to alert the property owner. The alarm unit is normally operable in a standby mode and is switched from the standby mode to an emergency mode when the motion sensor is activated. The personal unit alarm mode is activated when its transceiver receives an emergency signal from the alarm unit or when no standby signal has been received from the alarm unit.

Abstract: A multi function personal alert safety cell system having condition responsive sensors and an alarm for emergency type personal. The personal alert safety cell system having a transceiver. The transceiver for transmitting and receiving at several different radiated power levels, defined as P1, P2, P3, P4, P5, through Pn that vary in signal strength from 1 microwatt through 1 watt. Each power level P1, P2, P3, P4, P5, through Pn being transmitted and received with encoded data and a personal ID uniquely assigned to the transceiver of the cell system. Also, the transceivers transmitting and receiving data being contained within a time frame and having digital instructions and coded format sectors. The power level ID varying in field strength for defining a distance at which the transceiver detects the transmitted and received signal from another of PASS transceiver and the signal being indicative of the distance the transceiver is from the other PASS transceivers.

Abstract: A vehicle communication device is installed in a vehicle and used for an ETC or other DSRC system. The vehicle communication device can be switched between a normal mode and a radio wave emitting mode. The vehicle communication device in the normal mode transmits a response signal in response to receiving a pilot signal from a roadside radio device. The vehicle communication device in the emitting mode continuously emits a radio wave through the windshield of the vehicle independently of whether it receives the pilot signal from the roadside radio device, and a checking device receives the radio wave. The checking device determines whether the intensity of the received radio wave is greater than a predetermined threshold. The result of the determination is reported to a staff in a service or repair shop so that a shop staff can determine whether the vehicle communication device can be used for the ETC or other DSRC system based on the reported result.

Abstract: A system for providing vehicle location information or confirmation of remote entry system operation to a user. In one embodiment, a vehicle transceiver receives a wireless vehicle device function signal, and a vehicle controller generates a vehicle device control signal for use in operating a vehicle device in response. The vehicle controller also confirms operation of the vehicle device, and the vehicle transceiver transmits a wireless vehicle device function confirmation signal. A remote unit includes a transceiver for operation by the user for transmitting the vehicle device function signal and for receiving the vehicle device function confirmation signal. The remote unit also includes an indicator for providing an indication to the user confirming operation of the vehicle device, and a storage device for storing retrievable data representing the indication confirming operation of the vehicle device.

Abstract: A monitor of a body parameter of an infant, comprises at least one monitoring station having at least one sensor arranged to sense a body parameter of an infant, a controller responsive to the sensing of the body parameter of the infant by the at least one sensor to generate a signal that is either indicative of the sensed body parameter or indicative of a result from a comparison of the sensed body parameter with at least one value, and a transceiver arranged to transmit the signal in response to direction from the controller and at least one companion station having a further transceiver and having an output device and being spaced from the at least one monitoring station, the further transceiver being responsive to receipt of the signal to transmit the signal to the output device.

Abstract: A signal quality monitoring device includes alarm producing/canceling sections for first and second grade, and an alarm holding section for, when a grade of low quality of the current signal shifts from one to the other grades and the corresponding alarm producing/canceling section discriminates that the current signal is in the other grade of low quality, holding the continuous output of the one alarm regardless of the cancellation by the one alarm producing/canceling section, until the other alarm producing/canceling section produces the continuous output of the corresponding other alarm as a consequence of expiration of the corresponding producing time period. Therefore, no-alarm states, caused by frequently shifting of low quality among plural grades in accordance with lengths of a producing time period and a canceling time period set for each grade of low quality, can be avoided.

Abstract: A mobile telephone includes a control device, which comprises a receiver to receive an enabling signal and a controller to enable operation of the mobile telephone in dependence upon the enabling signal. An active badge transmits the enabling signal. If the telephone and the badge are separated and the mobile telephone is no longer able to receive the enabling signal, then the controller disables the mobile telephone.

Abstract: In a vehicle equipped with a dedicated short-range two-way communications system to acquire and otherwise participate in a roadway information service, method and apparatus are provided to detect (301) an absence of the availability of such a service and to respond by substituting (302) roadway information from other sources and to provide notice (303) to the driver regarding the absence of realtime service information and/or the present use of substituted roadway information.

Abstract: A security apparatus for a mobile electronic system, comprising a remote controller and a receiver. When the mobile electronic system is turned off and the control module is unable to establish a wireless connection to the receiver within a first time period, the remote controller activates an alarm module. When the mobile electronic system is turned on and the receiver is able to establish a wireless connection to the remote controller, the mobile electronic system enables access, wherein the remote controller comprises a control key, which is able to disable wireless function of the security apparatus.