35results about How to "Constant control" patented technology

Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.

A surround sound system for reproducing a spatial sound field in a sound control region within a room having at least one sound reflective surface. The system uses multiple steerable loudspeakers located about the sound control region, each loudspeaker having a plurality of different individual directional response channels being controlled by respective speaker input signals to generate sound waves emanating from the loudspeaker with a desired overall directional response. A control unit connected drives each of the loudspeakers and has pre-configured filters based on measured acoustic transfer functions for the room for filtering the input spatial audio signals to generate the speaker input signals for all the loudspeakers to generate sound waves with co-ordinated overall directional responses that combine together at the sound control region in the form of either direct sound or reflected sound from the reflective surface(s) of the room to reproduce the spatial sound field.

Embodiments of the invention provide a scintillator material, a scintillator system, and/or a method of detecting incident radiation using a scintillator material, or scintillator system, comprising a polymer material that comprises chromophores. Additional embodiments provide a scintillator material, scintillator system, and/or a method of detecting incident radiation using a scintillator material, or scintillator system, comprising a polymer material having one, two, three, or more, organic dyes dissolved therein wherein the polymer material having the one, two, three, or more dyes dissolved therein comprises chromophores. At least one of the dyes, termed the base dye, has a concentration in the range 0.5 to 3.5 mol/L. In a specific embodiment, the base dye has a concentration in the range 1.0 to 3.0 mol/L. This base dye concentration is high enough to achieve a substantial triplet-triplet state annihilation rate despite the negligible diffusion of the dye in the rigid polymer matrix.

In the present invention, there is provided a plasma processing apparatus including a vacuum processing chamber for applying a plasma processing to a sample, a sample stage deployed inside the vacuum processing chamber for mounting the sample thereon, induction antennas provided outside the vacuum processing chamber, a radio-frequency power supply for supplying a radio-frequency power to the induction antennas, and a Faraday shield which is capacitively coupled with the plasma, a radio-frequency voltage being applied to the Faraday shield from the radio-frequency power supply via a matching box, wherein the matching box includes a series LC circuit including a variable capacitor and an inductor, a motor control unit for controlling a motor for the variable capacitor, and a radio-frequency voltage detection unit for detecting the radio-frequency voltage applied to the Faraday shield, the matching box executing a feedback control over the radio-frequency voltage applied to the Faraday shield.

A pressurized gas supply system includes a pressurized container which expands and contracts. The container includes a one-piece liner molded from a polymer which is reinforced by a high tensile fiber such as KEVLAR®. A valve is molded into the liner, and a regulator is connected to the valve. A hose, having a conserver positioned therealong, extends between the regulator and a fitting allowing a user to inhale gas from the container. The container is carried in a carrying bag, which can be in the form of a carrying case, a purse, or a back-pack.

The invention relates to a current-adjustable and PWM flicker control constant-current driving circuit, which comprises a power supply and protection circuit (1), an LED or LD module (2), an MCU control circuit (7), a constant-current driving and current sampling circuit (3), a reference voltage setting circuit (4), a current setting and flicker control circuit (5) and a feedback and compensationcircuit (6). The constant-current driving and current sampling circuit is used for realizing adjustment of current output. The reference voltage setting circuit is used for setting reference voltageof the output current. The current setting and flicker control circuit is used for setting a pulse or a constant current value and setting frequency and pulse width. The feedback and compensation circuit realizes current feedback and dynamic compensation of the system, achieves the purpose of stabilizing current output, and has the effects of improving the rising speed of output current and widening the width of the output current. According to the invention, the constant current or pulse current of the LED or LD module can be adjusted, PWM adjustment and flicker control of the pulse current can be carried out, and the requirement of constant current driving in an LED light source and an LD laser system in a machine vision system can be met.

The present invention relates to a method for forming a light beam, and to a light assembly comprising at least one light source placed in conjunction with a fixed reflector, which reflector forms a beam of light into light forming means, which light assembly comprises a front lens, where the light forming means at least comprise a light deflecting means for changing the light angle of the light beam after passing through the front lens. The object of the invention is to achieve a light assembly, where major optical components are mechanically fixed in relation to a housing for achieving a light assembly, the mass centre of which changes only slightly during operation. A further object is to achieve a closed light assembly having openings in the case only for cooling. This can be achieved, if the front lens has a central part that differs from the surrounding parts of the front lens, and where the light deflecting means in a first position concentrates the light beam into the central part of the front lens to generate a wide-angle light beam, and where the light deflecting means in a second position distributes the light beam over the entire front lens to generate a narrow-angle light beam, and where the light deflecting means is connected with a first actuator, and where the light deflecting means is movable between the first and the second position. A very efficient wash light zoom system can hereby be achieved, where the front lens has different characteristics between its centre portions and the rest of the surrounding part of the front lens. Because of the internal light deflecting means, the front lens does not have to be movable with respect to the housing. Furthermore, the reflector and the lamp are held in a fixed position. This may result in constant control of the air flowing around the optical components.

The problem to be met by the present invention is to provide a controller which can execute control processing in synchronism with a synchronizing signal output from a host controller without taking into consideration a difference between a clock signal used for generating a synchronizing signal of the host controller and a clock signal used for generating a control cycle signal of a controller; and can enhance accuracy performance of control. According to the present invention, in a controller having a control interrupt processing section, a synchronization interrupt processing section adjusts means for generating a control cycle signal to thus generate a control interrupt signal such that the control cycle signal is generated while being delayed by an amount equal to or greater than the duration of an accuracy error between a quartz oscillator used for generating a synchronization interrupt signal and a quartz oscillator used for generating the control cycle signal, thereby executing control interrupt processing in synchronism with the synchronizing signal from the outside.

A fixed frequency dimming method and fixed frequency dimming circuit for a light emitting module can control light emitting brightness of the light emitting module through a hysteresis control circuit. A voltage difference between an upper limit voltage and a lower limit voltage of a hysteresis width of the hysteresis control circuit is maintained at a fixed value, and a driving current flowing through the light emitting module is changed by changing the upper limit voltage or the lower limit voltage.

The invention discloses an intelligent skid-mounted chemical dosing device used for oil field producing well sets. The device includes a chemical dosing pump arranged on an oil well, a chemical dosingmain pipe connected to the chemical dosing pump, and chemical dispensing pipes communicating with the chemical dosing main pipe; a pressure transducer and an automatic flow controller are installed on the chemical dosing main pipe; and a closed loop can be formed by the pressure transducer and the automatic flow controller. The device adopts an advanced automatic control technology, and forms theclosed loop with a pressure transmitter, so that automatic adjusting can be achieved, the constant pressure of the inlets and outlets of pumps and pipelines can be guaranteed, and quantitative functions can be accomplished; the compact structure and small land occupation area of the whole device can be realized through a reasonable and optimized pipeline process; through the utilization of computer technologies, control technologies and communication technologies, remote monitoring, sub-metering and data processing can be accomplished, and therefore, the device is suitable for current industrial modernization models, the enhancement of production management levels can be promoted, and refined management can be realized; and the device has an automatic remote-control function and a manualcontrol mode, so that the device is the best solution for paraffin and scale control and chemical dosing in oil fields.

The invention relates to a device for dismountably connecting two intersecting formwork beams, which comprises a single-component elastic structure with two intermediate arms joining together respective areas for pressing the two beams together in support areas, and which can longitudinally slide over one of the beams until it reaches the other beam, the device being elastically deformed by means of pressure or impact thereon, so as to clamp or hold both beams and press them together.

An inhaler for use with a dry powder pharmaceutical formulation, including: a chamber containing the dry powder formulation, a valve disposed in series with the chamber for regulating air flow through the chamber, and a bypass coupled around the combination of the chamber and the valve, where the valve and bypass cooperate for ensuring that the air flow is at least essentially fixed or kept constant or at a minimum accepted or desired or required flow rate through the chamber, and for varying air flow restriction through the inhaler with flow rate, or for keeping the air flow restriction generally constant.

The invention discloses a galvanostat, a water outlet terminal, a bubbler and an adapter, the galvanostat comprises a shell and an elastic ring, a water flow cavity, a water inlet and a water outlet are formed in the shell, the water inlet and the water outlet are communicated with the water flow cavity, and the elastic ring is arranged at the end, where the water outlet is located, of the water flow cavity; the elastic ring is located on the periphery of the water outlet. The device further comprises a movable part which is movably arranged in the water flow cavity, the movable part is provided with a plurality of extrusion parts which face the elastic ring and are distributed in the circumferential direction of the elastic ring at intervals, and when water enters the water inlet, the movable part is driven by water pressure to move towards the side where the elastic ring is located. Each extrusion part is close to or in contact with or extrudes the elastic ring, and a water passing gap communicated with the water flow cavity and the water outlet is formed between every two adjacent extrusion parts. The movable part is arranged, the area of the pressed face of the movable part is easily larger than that of the pressed face of the elastic ring, and therefore the high-sensitivity flow control valve is high in sensitivity and constant in flow control.

The invention discloses a melt liquid level control device comprising a small direct-current motor, a material cylinder and an electrical cabinet. Stirring blades are arranged on the lower portion ofthe small direct-current motor and located in the material cylinder, and an adjusting resistor and a frequency converter control signal connector are arranged in the electrical cabinet. The adjustingresistor is electrically connected with the small direct-current motor in series, the frequency converter control signal connector is electrically connected with the adjusting resistor in parallel, and the electrical cabinet is located at the side edge of the small direct-current motor. The melt liquid level control device has the advantages that the small direct-current motor is arranged in the material cylinder, the stirring blades are arranged at the lower end of the material cylinder, a melt in the material cylinder is stirred, the adjusting resistor is electrically connected in series, afrequency converter for controlling an extruding motor of a screw extruder is connected with the adjusting resistor in parallel, the rotating speed of the screw extruder can be adjusted to be matchedwith the liquid level in the material cylinder, namely, the rotating speed is large when the liquid level is low, and the rotating speed is small when the liquid level is high, and thus the liquid level in the material cylinder can be well controlled to be constant for transferring.