63results about "Speed/accelaration control without auxillary power" patented technology

A valve body has an elongated bore in communication with an inlet port and an outlet port. A valve element is movable within the bore between deactuated and actuated positions. A valve sensor generates a sensor signal indicative of an instantaneous parameter of the valve that changes between the deactuated and actuated positions. A logic unit receives the sensor signal and a pilot command signal that actuates the valve. A predetermined change in the pilot command signal causes the logic unit to determine a cycle parameter responsive to a time period between two predetermined events. At least the beginning or end of the time period corresponds to a predetermined value of the sensor signal. The individual determinations of the cycle parameter are accumulated to obtain an expected cycle parameter. The logic unit generates an indication signal when the cycle parameter exhibits a predetermined variance from the expected cycle parameter.

This invention discloses one fan rotation control system and method applied in electrode device with fan temperature adjust, wherein, the system comprises the following parts: temperature test unit with multiple sensors to test different heat object temperature for output; memory unit to store temperature and rotation speed relationship to make the preset temperature respond one preset rotation and process module; catching temperature fan rotation according to the output temperature; sending one control signal to one fan.

Timepiece wheel governor (1) for regulating the pivoting speed (ω) of a wheel set (3), about a pivot axis (D1), including a pivoting inertia-block (4).

It includes a means (7) of returning said block (4) towards said axis (D1), and, when said wheel set (3) pivots at a lower speed than a reference speed (ωc), said block (4) remains confined within a first volume of revolution (VI), and, when said wheel set (3) pivots at a higher speed than said reference speed (ωc), said block (4) is engaged, in one peripheral portion (30) thereof, in a second volume (VE) contiguous with and external to said first one (VI), said peripheral portion (30) cooperating in said second volume (VE) with a regulating means arranged to brake said wheel set (3) and return the pivoting speed (ω) thereof to said reference speed (ωc), and to dissipate the surplus energy.

The invention relates to a method for providing distance information of a scene with a time-of-flight camera (1), comprising the steps of emitting a modulated light pulse towards the scene, receiving reflections of the modulated light pulse from the scene, evaluating a time-of-flight information for the received reflections of the modulated light pulse, and deriving distance information from the time-of-flight information for the received reflections, whereby a spread spectrum signal is applied to a base frequency of the modulation of the light pulse, and the time-of-flight information is evaluated under consideration of the a spread spectrum signal applied to the base frequency of the modulation of the light pulse. The invention further relates to a time-of-flight camera (1) for providing distance information from a scene, whereby the time-of-flight camera (1) performs the above method.

A self-opened type valve is opened by motor torque of an electric motor. Therefore, a diaphragm is not necessary for opening the valve, and downsizing of a valve drive apparatus for opening the valve is possible. Since the valve is assembled to the motor shaft of the electric air pump via a motion-direction conversion mechanism, an opening action of the valve can start in a short time after a rotational action of the impeller of the electric air pump starts, so that control responsiveness is improved. At a rotation stop of the impeller of the electric air pump, the valve can be maintained in a fully closed condition by an urging force of the coil spring, thereby preventing exhaust gases or condensed water from entering into an inside of the electric air pump.

To provide a valve controller which is convenient for users in that, even users without abundant experience and expert knowledge can obtain the optimum operation performance for a short period of time; and it can be prevented that control performance is caused to be deteriorated on the contrary in dependence on changing way of each coefficient. A valve controller 8 for controlling valve opening of an expansion valve 4 by calculating the valve opening such that a detected temperature (degree of superheat) Tsh coincides with a target temperature (degree of superheat) T_S comprises: automatic tuning means for calculating a deviation e(t) between the detected temperature and the target temperature and for calculating changing amount of the valve opening m(t) by substituting at least the deviation and a set control parameter (PB, Ti, Td) into an arithmetic expression to automatically set the control parameter; and control level adjusting means for adjusting a magnitude of the valve opening calculated with the control parameter set by the automatic tuning means in stages in accordance with a set control level, and so on.

A controllable positive displacement pump for liquids and gases which may contain dispersed phase particles includes a pair of pistons operating out of phase. Each of the pistons is associated with an inlet valve which includes a fixed grating defining slots which extend parallel to piston travel and a complementarily configured grating which reciprocates transversely in timed relationship with the piston to control the influx of fluid. A rotary outlet valve is also associated with each piston and includes a rotating member disposed transversely across the cylinder head and which rotates in synchronism to open a through, radial port in the member in timed relationship to the piston travel. The positive displacement pump finds particular application to transport powder paint.

A device for driving a plurality of hydraulic shift cylinders, especially shift cylinders for shifting gears of a twin-clutch transmission, includes a first slide valve having a control intake to which control pressure is applied, a system pressure intake to which system pressure is applied, two outlets and at least one return outlet, the one outlet being connected to the system pressure intake and the other outlet being connected to the return outlet, as desired, and a valve device connected to the outlets of the slide valve via which the shift cylinders may be selectively actuated.

A self-contained valve actuator of the present invention can comprise an actuator component. This actuator can be linear or quarter turn depending on the valve. The actuator can be double acting which means the piston will move once to open and once to close. The self-contained valve system uses hydraulic fluid to operate the valve. The valve system is directly powered with electric power from a battery. Solar panels are also incorporated to capture solar energy and convert this energy into electrical energy. This converted electrical energy is stored in the battery which enables the battery to continuously supply energy while substantially reducing the possibility of exhausting battery power. This resupply of electrical energy and the use of the hydraulic fluid creates a self-contained valve actuation system.

The invention relates to an intelligent current stabilizer and method controlled by electro-rheological fluid, which is mainly characterized in that the self-adaption adjustment for the flow speed of the fluid is realized based on the combination of a laser speckle speed measurement technique and an electro-rheological technique, thereby reaching the purpose of current stabilization. When laser beams pass through the fluid containing trace particles, the transient speed of the fluid is obtained through a laser speckle speed measurement method. The transient speed of the fluid is compared with a set speed value through a control program, the electric field strength value applied on the fluid is determined; the fluid scattered with the trace particles generates electro-rheological effects; and the flow speed of the fluid in a pipeline is adjusted to be in correspondence with a set value by changing the solidification degree of the fluid, thereby realizing current stabilization. The invention can realize real-time measurement for the flow speed of the fluid and can realize automatic control for the flow speed and flow quantity of the fluid; and simultaneously, the system has the advantage of simplicity in structure and is easy to realize.

A valve comprising a valve carrier on which a plurality of control units are mounted adjacent to one another. Each control unit possesses a liquid-tight casing body in which the coomponent of a valve unit are received and is mounted on the valve carrier with a seal in between. It is in this manner that a liquid-tight, encapsulated and individual accommodation of the singular valve units is ensured.

A check valve for a diesel engine comprises a pipe formed with an oil inlet and oil outlet. A piston is slidably installed in the pipe and a spring pressures the piston toward the oil inlet side for closing an oil passage connecting the oil inlet and oil outlet. The spring is an asymmetric compression spring, which allows the compression length change of the spring to be relatively large at low oil pressure and slight at high oil pressure. Thereby, relatively increasing the oil jet change amount when the rpm of the diesel engine is low and decreasing the oil jet change amount when the rpm of the diesel engine is high. Thus reducing frictional loss of the engine oil pump and improving the fuel consumption rate.

An air driven tool for use in a machining center, the air driven tool including an adjustable speed regulator and a turbine. The turbine is driven by pressurized air directed thereto. The turbine is rotatable about an axis. A flow of the air is regulated by the adjustable speed regulator. The adjustable speed regulator includes a biasing member, an inclined annular surface, a regulator plate and a plurality of moveable bearings. The inclined annular surface has an angle relative to the axis. The plurality of movable bearings are positioned between the inclined annular surface and the regulator plate. The biasing member biases the inclined annular surface and/or the regulator plate toward each other.

A speed governor for an elevator, comprising: a speed governor pulley (13) wound with a speed governor rope (7) linked with an elevator car (1) and supported by a shaft; claws (46, 46A) The swing member (18, 18A) moved toward the outer diameter side of the pulley (13) by the centrifugal force generated by the rotation of the pulley (13); is formed by contacting the moving claw (46, 46A) Rotate and release the engaging piece of the switch (22); use its own weight to rotate, and clamp the wedge part (31, 31A) of the governor rope (7) between the opposite clamping piece (37, 37A) ); and a hook that rotates and releases the support of the wedge (31, 31A) by abutting against the claw (46, 46A) that moves further toward the outer diameter side of the pulley (13), wherein, The wedge portion (31, 31A) is urged toward the speed governor rope (7) by the elastic force of the disc spring (43). Therefore, a speed controller for an elevator that can be easily downsized is provided.