초록 ▼

An alarm device for monitoring the movements of a person is disclosed. The device is designed to be attached to a person\s clothing and is particularly suitable for use by an emergency worker, such as a fireman. The device comprises a motion sensor, a signal processing circuit on a printed circuit b

An alarm device for monitoring the movements of a person is disclosed. The device is designed to be attached to a person\s clothing and is particularly suitable for use by an emergency worker, such as a fireman. The device comprises a motion sensor, a signal processing circuit on a printed circuit board, and an alarm, all contained within a housing. The motion sensor includes a permanent magnet attached to one end of a spring located within an induction coil wound on a bobbin. The other end of the spring is attached to the printed circuit board so that a voltage is induced across the coil due to vibrations of the magnet relative to the coil in response to movements of the housing of the device. The signal processing circuit activates the alarm to generate an alarm signal if the person is immobile, for example, as the result of an injury, for a predetermined period of time.

대표청구항 ▼

A device for monitoring the movement of a person or article, comprising: a first means for providing a magnetic field; a second means for detecting changes in the magnetic field provided by the first means due to any changes in the position of the first means relative to the second means and for gen

A device for monitoring the movement of a person or article, comprising: a first means for providing a magnetic field; a second means for detecting changes in the magnetic field provided by the first means due to any changes in the position of the first means relative to the second means and for generating an electrical signal varying in magnitude in proportion of the amount of change in the magnetic field which is detected; a third means for moving the first means relative to the second means in response to movements of the person or article in any direction; an alarm means for producing an alarm signal when the alarm means is energized; a circuit means having an adjustable sensitivity, connected between the second means and the alarm means, for processing the electrical signal generated by the second means and for energizing the alarm means when the processed electrical signal meets predetermined conditions; a means for housing the first means, second means, third means, alarm means, and circuit means to form a selfcontained unit; and a means for attaching the unit to the person or article.