FIber optic apparatus for switching electrical loads

A fiber optic switching apparatus for switching electrical loads is comprised of a switching box, an optical cable, and an electronic adapter. The switching box consists of an internal housing attached to the front panel of an external housing, and an actuator and a fitting for holding the optical cable. The internal housing consists of an optical switching module that includes a fiber aligning unit and a shutter with filtering means; the filtering means can slide in a narrow gap in the fiber alignment unit which has illuminating and detecting fibers; the shutter is mechanically connected to the actuator. The fibers are terminated in a fiber optic connector that is located outside the internal housing. The electronic adapter consists of a light illuminating and a light detecting means which are operated by a microcontroller providing output to a switching means that switches electrical loads.

Cable identifier apparatus and method

The invention is a cable identifier apparatus and a method for fast identification of multi-wire or multi fiber cable. The method is based on illumination of colored buffer of the wire or fiber, registration the reflected light and comparison the measuring data with reference data stored in the memory. The reference data is loaded by measuring the color parameters of the buffer of known identification. The cable identifier apparatus comprises a portable hand-held device with a probe for fixing the buffer in a holder, illuminating the buffer, controlling the incident light and detecting the reflected light with photodetectors. The data is proceed by a microcontroller and an identification symbol of the buffer is displayed in LCD. The variation of the ambient light is compensated by separate measurement of dark and light signals from photodetectors.

Fiber optic flow sensing device and method

The invention provides an optical flow meter for measuring fluid flow through a pipe which obviates the need for the flow to be seeded with foreign particles. The meter comprises a fiber optic Sagnac interferometer with optical path crossing the flowing fluid. The interferometer measures velocity of the fluid by measuring the phase difference between the two beams propagating in the optical path in opposite directions. Light, which is deflected by the fluid, is collected by optical means at both sides of the optical path for calculation, the scintillating statistics and compensation for light intensity.

Dental color comparator scope

A dental comparator scope for comparing a dental shade to a natural tooth. The scope comprises an L-shape body which includes a sight applying to the tooth and a handle for holding the scope, and a cartridge with a plurality of dental shades in it. Two identical optical channels are mounted, one inside of the sight and another inside of the handle. The channels include lenses and polychromatic light sources, preferable white LEDs. A mirror is placed in a point where optical axes of the channels are crossing. A split image of the shade and the tooth is observed through an eyepiece. The shades in the cartridge are driven by a motor when a button on the body is pressed by finger. The motor, light sources and adjuvant electronics are powered by a battery which is placed in the handle. The cartridge is snapped to the handle in a steady position. According to yet another embodiment, the cartridge can be shifted toward and backward the tooth and different zones of the shade can be compared with ...

Cable identifier apparatus and method

The invention is a cable identifier apparatus and a method for fast identification of multi-wire or multi fiber cable. The method is based on illumination of colored buffer of the wire or fiber, registration the reflected light and comparison the measuring data with reference data stored in the memory. The reference data is loaded by measuring the color parameters of the buffer of known identification. The cable identifier apparatus comprises a portable hand-held device with a probe for fixing the buffer in a holder, illuminating the buffer, controlling the incident light and detecting the reflected light with photodetectors. The data is proceed by a microcontroller and an identification symbol of the buffer is displayed in LCD. The variation of the ambient light is compensated by separate measurement of dark and light signals from photodetectors.

High Precision Infusion Pumps

A system architecture for closed loop control of infusion devices is described. The architecture provides means to control the flow from an infusion device as well as in some embodiments the pressure of the delivery. A variety of infusion systems are described that use the closed loop control architecture. In some embodiments the closed loop control may be adapted to current commonly used infusion means such as a gravity feed intravenous system. Other embodiments describe infusion pump system that use biasing or drive mechanisms of springs, elastomers, rotary and linear motors.

Electrosurgical pencil with a smoke evacuating blade

An electrosurgical pencil with a smoke evacuating blade to be used in general surgery and laporoscopy. The blade has a plurality of lateral holes and at least one longitudinal hole in its thicker central part. In a place where the blade is attached to a hadpiece, it is connected to a smoke evacuating tube that is pulled through the handpiece. The tube is inserted in a cable assembly together with electrical wires and connected to an vacuum source; the air flows through the blade to the tube. Due to close proximity to the cutting area, minimum negative pressure is required for sucking of smoke and no obscure of surgeon's view occurs.

Optical Device and Method for Sensing Multiphase Flow

A method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid by transparent portions of the pipe. The at least two collimated beams are spaced apart in a direction of flow of the multiphase fluid by a predetermined distance. The method also includes detecting scattered, deflected and attenuated light with at least two photodetectors to produce at least two signals. The at least two photodetectors are associated with the at least two collimated beams. The method also includes calculating a cross-correlation function between the at least two signals to determine a time delay between the signals and calculating the average velocity of the multiphase fluid by taking the ratio of the predetermined distance to the time delay.

Optical transit time velocimeter

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

Fiber optic sensing device for measuring a physical parameter

A fiber optic sensing device uses a Fabry-Perot cavity to sense a physical parameter. The cavity modulates the incident polychromatic light. The modulated light is recorded by an optical spectrometer means. The spectrum is analyzed in a signal processing unit which normalizes the spectrum and determines the phase of the modulated signal. The phase, accumulated over whole range of wavelengths, has been used for identification of the physical parameter using a look-up-table. The cavity, the polychromatic light source and the spectroscope means are connected by fiber optic means.

Magnetic resonance imaging compatible response device

The invention is a response device to be used in functional magnetic resonance imaging (MRI) procedures. The device consists of keypads with fiber optic push button switches connected with fiber optic cables to an electronic unit for the illumination of the switches and the detection of depression events. The bodies of the keypads have a plurality of openings; therefore, the switches can be positioned in different locations on the keypad to be ergonomically activated with the patient's fingers. The switches can also be located in a symmetrical arrangement allowing them to be pressed with a knob in sequence for performing joystick functions.

Optical device and method for sensing multiphase flow

A method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid by transparent portions of the pipe. The at least two collimated beams are spaced apart in a direction of flow of the multiphase fluid by a predetermined distance. The method also includes detecting scattered, deflected and attenuated light with at least two photodetectors to produce at least two signals. The at least two photodetectors are associated with the at least two collimated beams. The method also includes calculating a cross-correlation function between the at least two signals to determine a time delay between the signals and calculating the average velocity of the multiphase fluid by taking the ratio of the predetermined distance to the time delay.

Fiber Optic Flow Sensing Device and Method

The invention provides an optical flow meter for measuring fluid flow through a pipe which obviates the need for the flow to be seeded with foreign particles. The meter comprises a fiber optic Sagnac interferometer with optical path crossing the flowing fluid. The interferometer measures velocity of the fluid by measuring the phase difference between the two beams propagating in the optical path in opposite directions. Light, which is deflected by the fluid, is collected by optical means at both sides of the optical path for calculation, the scintillating statistics and compensation for light intensity.

Fiber optic sensing device for measuring a physical parameter

A fiber optic sensing device uses a Fabry-Perot cavity to sense a physical parameter. The cavity modulates the incident polychromatic light. The modulated light is recorded by an optical spectrometer means. The spectrum is analyzed in a signal processing unit which normalizes the spectrum and determines the phase of the modulated signal. The phase, accumulated over whole range of wavelengths, has been used for identification of the physical parameter using a look-up-table. The cavity, the polychromatic light source and the spectroscope means are connected by fiber optic means.

Dental light curing and diagnosing device

A dental light curing device with an expanded functionality for diagnosing abnormalities by observation of native or induced fluorescence in the oral cavity. An optical assembly consisting of a short pass or band pass filter and a spacer is applied to the output distal end of the dental light curing device. A long pass filter is applied to the attenuating filter or the spacer is made as a long pass filter. The diagnosing sites can be seen through the spacer.

Fabry-perot fiber optic sensing device and method

The invention provides a device and a method for measuring a physical parameter. The device comprises a Fabry-Perot interferometer coupled to a polychromatic light source via fiber optic means. Light, modulated by the Fabry-Perot cavity, is recorded by a spectrometer. A phase function is calculated by a signal processing means from the modulated spectrum. Correlation coefficients are calculated between the determined phase function and a number of theoretical phase functions calculated for a variety of gap spacing of the Fabry-Perot cavity or a number of calibrated phase functions measured for variety of values of physical parameter. The gap spacing, which is associated with the physical parameter, is determined from the best-matched phase function. The processing time is shortened by the approximate estimation of the gap spacing through the position of the maximums and minimums of the modulated spectrum and by consequent precise determining of the gap spacing through correlation.

High precision infusion pumps

A system architecture for closed loop control of infusion devices is described. The architecture provides means to control the flow from an infusion device as well as in some embodiments the pressure of the delivery. A variety of infusion systems are described that use the closed loop control architecture. In some embodiments the closed loop control may be adapted to current commonly used infusion means such as a gravity feed intravenous system. Other embodiments describe infusion pump system that use biasing or drive mechanisms of springs, elastomers, rotary and linear motors.

High precision infusion pump controller

A controller for closed loop control of infusion devices is described. A variety of infusion systems are described that use the closed loop control architecture. In some embodiments the closed loop control may be adapted to current commonly used infusion means such as a gravity feed intravenous system. Other embodiments describe infusion pump system that use biasing or drive mechanisms of springs, elastomers, rotary and linear motors.

OPTICAL TRANSIT TIME VELOCIMETER

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

Fibre optic apparatus for switching electrical loads

A fibre optic switching apparatus for switching electrical loads is comprised of a switching box, an optical cable, and an electronic adapter. The switching box consists of an internal housing attached to the front panel of an external housing, and an actuator and a fitting for holding the optical cable. The internal housing consists of an optical switching module that includes a fibre aligning unit and a shutter with filtering means; the filtering means can slide in a narrow gap in the fibre alignment unit which has illuminating and detecting fibres; the shutter is mechanically connected to the actuator. The fibres are terminated in a fibre optic connector that is located outside the internal housing. The electronic adapter consists of a light illuminating and a light detecting means which are operated by a microcontroller providing output to a switching means that switches electrical loads.

Optical Gas Flow Meter

The invention provides an optical gas flow meter for measuring very low gas flow in a pipe. The meter comprises an optical system which transilluminates the pipe with plurality of parallel, collimated optical beams. The beams are deflected due to changes refractive index which is caused by a heater located in the pipe parallel to the beams. Deflected beams then pass through spatial filters and are detected by photodetectors. Stochastic signals from the photodetectors are further processed and gas velocity is calculated from cross-correlation function and known beam spacing. Multiple heaters allow the measurement of gas velocity at multiple points throughout the pipe.

Fiber optic sensing system

The invention provides a fiber optic sensing system for use in environments hostile to electronics. The system comprises an optical module comprising a light source and a photodetector, a probe comprising a glass optical fiber core, preferably with a transducer sensitive to the measurement parameter coupled thereto, an extension comprising a plastic optical fiber core, a first connector configured to optically couple the extension to the probe and a second connector configured to optically couple the extension to the optical module. Light emitted from the light source is transmitted to the transducer on the probe and returned to the photodetector by the extension.

Optical transit time velocimeter

One embodiment of the invention provides a L2F velocimeter comprising a probe which may be inserted into a flowing fluid. The probe has an optical illumination system and an optical collection system which are coaxial. The illumination system directs light through the fluid, and the collection system collects forward scattered light which passes through the fluid.

High precision infusion pumps

Bombas de infusion de alta precision.

Se describe una arquitectura de sistema para control de ciclo cerrado de dispositivos de infusión. La arquitectura provee medios para controlar el flujo de un dispositivo de infusión así como en algunas modalidades la presión del suministro. Se describe una variedad de sistemas de infusión los cuales utilizan la arquitectura de control de ciclo cerrado. En algunas modalidades el control de ciclo cerrado puede adaptarse a los medios de infusión actuales comúnmente utilizados tales como sistema intravenoso de alimentación por gravedad. Otras modalidades describen el sistema de bombeo por infusión que utiliza mecanismos de inclinación o impulsión de resortes, elastómeros, motores giratorios y lineares.

Optical transit time velocimeter

One embodiment of the invention provides a L2F velocimeter comprising a probe which may be inserted into a flowing fluid. The probe has an optical illumination system and an optical collection system which are coaxial. The illumination system directs light through the fluid, and the collection system collects forward scattered light which passes through the fluid.

APPARATUS AND METHOD FOR MEASURING SPEED FLUID SPEED

aparelho e método para medir a velocidade de um fluido em escoamento. um velocímetro l2f compreende uma sonda para inserção em um fluido, a sonda tendo nela uma área aberta para permitir que o fluido a atravesse. a sonda compreende um sistema de iluminação para direcionar um par de feixes de luz separados por uma distância através da área aberta, e um sistema de coleta para coletar luz dispersada para a frente, dispersada a partir de partículas no fluido. o sistema de coleta tem um eixo óptico em comum com o sistema de iluminação. o velocímetro ainda compreende um conjunto eletro-óptico conectado à sonda para fornecer luz para o sistema de iluminação, para receber luz coletada a partir do sistema de coleta, para medir um tempo decorrido em flutuações da luz dispersada para a frente criadas por partículas que atravessam o par de feixes de luz, e para calcular a velocidade do fluido com base no tempo decorrido e a distância de separação. apparatus and method for measuring the velocity of a flowing fluid. A speedometer 12f comprises a probe for insertion into a fluid, the probe having an open area therein to allow fluid to pass therethrough. The probe comprises a lighting system for directing a pair of light beams separated by a distance across the open area, and a collection system for collecting forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the lighting system. The speedometer further comprises an electro-optical array connected to the probe to provide light to the lighting system, to receive light collected from the collection system, to measure a time elapsed in forward scattered light fluctuations created by particles passing through. the pair of light beams, and to calculate fluid velocity based on elapsed time and separation distance.

Optical transit time velocimeter.

Un velocimetro de L2F comprende una sonda para su insercion en un fluido, la sonda tiene un area abierta en la misma para permitir que el fluido pase a traves de la misma. La sonda comprende un sistema de iluminacion para dirigir un par de haces de luz, separados por una distancia, a traves del area abierta, y un sistema de recoleccion para recolectar la luz dispersada hacia delante de las particulas en el fluido. El sistema de recoleccion tiene un eje optico en comun con el sistema de iluminacion. El velocimetro ademas comprende un ensamble electro-optico conectado a la sonda para proporcionar luz al sistema de iluminacion, para recibir la luz recolectada del sistema de recoleccion, para medir un tiempo transcurrido en fluctuaciones de la luz dispersada hacia delante creada por las particulas que pasan a traves del par de haces de luz para calcular la velocidad del fluido basandose en el tiempo transcurrido y la distancia de separacion.

Optical transit time velocimeter

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

Optical transit time velocimeter

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

Optical transit time speedometer

Optical transit time speed templates

En L2F-hastighetsmåler innbefatter en sonde for innføring i et fluid. Sonden har et åpent område som muliggjør at fluid kan gå gjennom. Sonden innbefatter et belysningssystem for retting av et par lysstråler, atskilt med en avstand, gjennom det åpne området, og et samlesystem for samling av foroverspredt lys som spres fra partikler i fluidet. Samlesystemet har samme optiske akse som belysningssystemet. Hastighetsmåleren innbefatter videre en elektrooptisk innretning som er forbundet med sonden, for tilveiebringelse av lys for belysningssystemet, for mottak av lys samlet med samlesystemet, for måling av medgått tid i fluktuasjoner av det foroverspredte lyset som skyldes partikler som går gjennom paret av lysstråler, og for beregning av fluidets hastighet basert på den medgåtte tiden og avstanden.

Optical transit time velocimeter

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

Optical transit time velocimeter

Optical transit time velocimeter

An L2F velocimeter comprises a probe for insertion into a fluid, the probe having an open area therein to allow the fluid to pass through. The probe comprises an illumination system to direct a pair of light beams, separated by a distance, through the open area, and a collection system to collect forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the illumination system. The velocimeter further comprises an electro optical assembly connected to the probe to provide light to the illumination system, to receive light collected from the collection system, to measure a lapse time in fluctuations of the forward scattered light created by particles passing through the pair of light beams and to calculate the velocity of the fluid based on the lapse time and the separation distance.

apparatus and method for measuring the velocity of a flowing fluid

APARELHO E MÉTODO PARA MEDIR A VELOCIDADE DE UM FLUIDO EM ESCOAMENTO. Um velocímetro L2F compreende uma sonda para inserção em um fluido, a sonda tendo nela uma área aberta para permitir que o fluido a atravesse. A sonda compreende um sistema de iluminação para direcionar um par de feixes de luz separados por uma distância através da área aberta, e um sistema de coleta para coletar luz dispersada para a frente, dispersada a partir de partículas no fluido. O sistema de coleta tem um eixo óptico em comum com o sistema de iluminação. O velocímetro ainda compreende um conjunto eletro-óptico conectado à sonda para fornecer luz para o sistema de iluminação, para receber luz coletada a partir do sistema de coleta, para medir um tempo decorrido em flutuações da luz dispersada para a frente criadas por partículas que atravessam o par de feixes de luz, e para calcular a velocidade do fluido com base no tempo decorrido e a distância de separação. APPARATUS AND METHOD FOR MEASURING SPEED FLUID SPEED. An L2F speedometer comprises a probe for insertion into a fluid, the probe having an open area therein to allow fluid to pass therethrough. The probe comprises a lighting system for directing a pair of light beams separated by a distance across the open area, and a collection system for collecting forward scattered light scattered from particles in the fluid. The collection system has an optical axis in common with the lighting system. The speedometer further comprises an electro-optical assembly connected to the probe to provide light to the lighting system, to receive light collected from the collection system, to measure a time elapsed in forward scattered light fluctuations created by passing particles. the pair of light beams, and to calculate fluid velocity based on elapsed time and separation distance.

High precision infusion pump controller

High precision infusion pump controller

Fiber optic flow sensing device and method

The invention provides an optical flow meter for measuring a flow of fluid through a pipe. The optical flow meter comprises a wave energy source for generating a pair of beams, a driver for controlling the wave energy source, a modulator coupled to the wave energy source for modulating a phase of one of the pair of beams at a phase modulation frequency, a pair of fibers for directing the pair of beams in opposite directions along a path through the flow of fluid, each of the pair of fibers comprising a tip positioned to direct one of the pair of beams towards a tip of the other fiber and to receive a diffused beam from the tip of the other fiber, a detector for receiving a pair of diffused beams received by the pair of fibers and for producing an electrical signal which oscillates with the phase modulation frequency, a digital signal processor configured to receive the electrical signal and calculate a flow velocity from a phase difference between the pair of beams, a pair of collecting optical systems positioned adjacent to the tip of one of the fibers for collecting deflected wave energy from the pair of beams, and, a compensation module coupled to receive the deflected wave energy from the collecting optical systems and configured to estimate a total intensity of light received by the tips of the pair of fibers and generate a compensation signal representative of the total intensity and provide the compensation signal to the driver, whereby the driver controls the wave energy source to vary an initial intensity of the pair of beams in response to the compensation signal such that the total intensity remains constant.

Optical device and method for sensing multiphase flow

The invention provides a method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid by means of transparent portions of the pipe, the at least two collimated beams spaced apart in a direction of flow of the multiphase fluid by a predetermined distance; detecting scattered, deflected and attenuated light with at least two photodetectors to produce at least two signals, the at least two photodetectors associated with the at least two collimated beams; calculating a cross-correlation function between the at least two signals to determine a time delay between the signals; and, calculating the average velocity of the multiphase fluid by taking the ratio of the predetermined distance to the time delay.

Optical device and method for sensing multiphase flow

The invention provides a method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid by means of transparent portions of the pipe, the at least two collimated beams spaced apart in a direction of flow of the multiphase fluid by a predetermined distance; detecting scattered, deflected and attenuated light with at least two photodetectors to produce at least two signals, the at least two photodetectors associated with the at least two collimated beams; calculating a cross-correlation function between the at least two signals to determine a time delay between the signals; and, calculating the average velocity of the multiphase fluid by taking the ratio of the predetermined distance to the time delay.

Appliance for drying