A product, in particular a shoe, apparel, a ball or a fishing lure, incorporating an impact sensing element made from polymeric piezoelectric material. In response to impact, the piezoelectric material generates an electrical signal to a battery-powered light- or sound-emitting unit or to an information display device which is at least partially molded into or contained in the product, thus causing circuitry to energize the light- or sound-emitting device from the battery or to display information on the information display device. In some embodiments involving light-emitting devices such as LEDs, the light is conducted to an outside surface of the product directly through the LED or via one or more optical fibers. A shoe can be provided with numerous light-emitting devices, one or more impact sensing elements, a temperature sensor and appropriate circuitry to process the impact and temperature information. This information is then used to light appropriate light-emitting devices such as to display a bar graph of temperature or force of impact, to light or flash individual light-emitting devices or to activate an information display device. In addition, a microprocessor can be included in the circuitry to provide preprogrammed control of the light emitting devices or to evaluate the input from the impact sensing element and then light the appropriate light emitting device or devices or to control the information displayed on the information display de2vice.

Products incorporating piezoelectric material

A light flasher for an article of apparel includes one or more lamps that produce light visible from the exterior of the apparel A switch, which may be of the mechanical or electronic variety, causes a switch closure responsive to motion of the apparel A circuit, attached to the switch and the light, causes the lights to illuminate in a series of random duration flashes for a predefined time interval in response to the closure of the switch

Motion activated apparel flasher

A mechanical/thermal stress transducer consisting of a piezo-pyroelectric material in electrical communication with a electroluminescent material, an electrode positioned between the piezo-pyroelectric material and the electroluminescent material forms the electrical communication at disjunct intervals so that the luminous intensity of light emitted by the electroluminescent material at any point is related to the mechanical/thermal stress acting at that point on the transducer. Selected applications of the transducer are included.

Piezoluminescent, pyroluminescent sensor

An Ethernet passive optical network provides a subscriber with a high speed and large capacity data service and a real time digital broadcast/video service. The network includes an optical line terminal for frame-multiplexing broadcast/video signals, which are obtained by performing a switching operation and a time-slot multiplexing with respect to a plurality of digital broadcast/video data delivered from external broadcasting vendors according to broadcast/video selection information delivered from each user, and communication data delivered through an Internet protocol network.

Ethernet PON using time division multiplexing to converge broadcasting/video with data

A shock detector provides for ultra low power detection and measurement of damage to an object caused by shock and vibration. The shock detector includes a shock sensor, such as an accelerometer, attached to the object that produces an electrical vibration signal representative of the mechanical vibration of the object. A signal conditioning circuit determines when the magnitude of the electrical vibration signal exceeds a threshold voltage and converts the signal into a digital signal that is in the high voltage state when the magnitude of the electrical vibration signal is above the threshold voltage. Otherwise, the digital signal is in a low voltage state. A data logger records the time spent in the high voltage state. The measured time data and the threshold voltage are then used to estimate the damage applied to the object. Mounting a number of the conditioning circuits in parallel allows for a more accurate estimation.

Low-power shock detector and detection method

A piezoelectric or ferroelectric stress sensing material in intimate electrical communication with an electroluminescent material produces light at an amplitude dependent on the stress applied to the stress sensing material. The light signal is transmitted from the electroluminescent material by fiber optic cable to an optical signal detector. In the preferred embodiments the electroluminescent material comprises a light emitting diode as a small electrical short circuit load across two otherwise insulated faces of a piezoelectric or ferroelectric element. The embodiments include a composite stress sensing and electroluminescent material, separate stress sensing and electroluminescent materials joined by conductive film, foil or wire and additional means to bias, amplify and control the optical signal produced by the electroluminescent material and transmitted by the fiber optic cable.

Electroluminescent optical fiber shock sensor

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Electroluminescent optical fiber shock sensor