摘要:
Actuator arrangement with an actuator (8), a reference mass (22), a spring (24) and a first sensor (26; 42, 43; 32, 36). The actuator (8) applies a force between a first object (2) and to a second object (16; 54). The reference mass (22) is, in use, supported by a third object (16; 56) by means of the spring (24). The first sensor (26; 42, 43; 32, 36) generates a first distance signal that depends on a first distance (z2; z5, z6; z3, z4) between the reference mass (22) and the first object (2) and is applied to a controller (6) to actuate the actuator (8).
摘要翻译:具有致动器(8),参考质量(22),弹簧(24)和第一传感器(26; 42,43; 32,36)的致动器装置。 致动器(8)在第一物体(2)和第二物体(16; 54)之间施加力。 参考质量(22)在使用中由第三物体(16; 56)借助于弹簧(24)支撑。 第一传感器(26; 42,43; 32,36)产生第一距离信号,该第一距离信号取决于参考质量块(22)和第二传感器(22)之间的第一距离(z 2; z 5,z 6; z 3,z 4) 第一物体(2)并且被施加到控制器(6)以致动致动器(8)。
摘要:
The present invention relates to a microwave band-pass filter comprising a plurality of coupled resonators including at least one coaxial resonator (1). For suppression of higher order or spurious pass-bands the filter is characterised in that a central hole (9) extends from the upper end of the inner conductor (6) of said at least one coaxial resonator through at least part of the length of the inner conductor, the central hole (9) forming a wave guide section, the cut-off frequency of which being above the pass-band of the band-pass filter, and in that the wave guide section contains in an upper portion (11) thereof a low loss dielectric material with a dielectric constant sufficiently high so that the cut-off frequency of the wave guide section is below the first higher order response of the band-pass filter, and in that the lower end portion (10) of the central hole (9) contains a lossy material.
摘要:
The present invention relates to a method for determine values for a set of construction parameters of a cavity resonator (1) comprising a housing (2) having a base (3), a sidewall (4) extending upwardly from the base (3) and an upper cover plate (5), and an inner conductor (6) having a width dimension D and extending upwardly from the base (3) along a length L, the housing (2) comprising a first material and the inner conductor (6) comprising a second material different from the first material. These values yield a minimum temperature induced change of resonant frequency f0 in a given temperature range ΔT with respect to the set of construction parameters. To determine the values, the resonant frequency f0 is calculated as a function of temperature and the set of construction parameters. The values of the set of construction parameters are varied, and the calculating step is repeated to derive optimum values for the set of construction parameters from the result of the calculation yielding a minimum temperature induced change of resonant frequency f0 in a given temperature range ΔT with respect to the set of construction parameters. The set of construction parameters includes the width dimension D of the inner conductor (6).
摘要:
A process and apparatus for processing a shredder light fraction including multi-duct nozzle having at least an end section positionable within a metallurgical vessel containing a molten metal bath. The shredder light fraction may be fed into the molten metal bath while using only small quantities of carrier gas, e.g., air or nitrogen, and protective gas, e.g., hydrocarbon or inert gas. The shredder light fraction and the carrier gas may be injected into the molten metal bath as a main jet and oxygen may also be injected into the molten metal bath as a secondary jet. The primary jet and the secondary jet may be surrounded by a gas jet formed by the protective gas being injected into the molten metal bath.
摘要:
Low cyanide nitriding salt baths which are composed of alkali cyanate and alkali carbonate and used for treating components made of steel and iron produce coatings on the surface of the component in some cases and can lead to problems in the use of the components. A satisfactory surface quality can be obtained from nitriding salt baths which additionally contain 0.5 to 100 ppm of selenium.
摘要:
Method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If for example a heart assist pump is driven with a constant number of revolutions, it is achieved, that the blood is also delivered through the assist pump, even when the heart chamber is in the decontraction phase. With the present method it is achieved, that an assist pump only acts supportingly in the pressure phase of the main pump, in such a way, that the pressure difference between the input side and the output side of the assist pump is continuously determined and the number of revolutions of the assist pump is controlled in such a way, that the determined pressure difference does not fall below a predetermined value and the rate of flow does not sink below zero.
摘要:
The invention relates to a magnetofluid-supported electromagnetic drive for a blood pump for supporting or partially to totally replacing the heart whereby the blood pump in its weight as well as its energy density nearly corresponds to the natural heart and is especially suitable for an implantation whereby a reduction of the total system in comparison with known systems is to be made possible and the efficiency is improved at the same time. This task is solved by the blood pump having a magnetofluid-supported electromagnetic drive consisting of one or several electromagnets and force-transforming facilities and with the space of at least one electromagnetic circuit being completely or partially filled with magnetofluid, whereby the poles show permanent-magnetic properties. Thereby, a magnetofluid with a saturation magnetization of 150 to 450 mT has been used with an initial permeability of 5 to 25.
摘要:
In a steel manufacturing mill, two opposed furnaces are provided with a turntable located between the furnaces. The turntable supports and rotates casting ladles which are filled from the output of the furnaces. The present disclosure is specifically related to the provision of a hoisting crane in the furnace area which has its longitudinal axis in a vertical plane passing through the central axis of the two furnaces.
摘要:
The output of coke ovens is increased if the brick constituting the wall between the flues and the coking chamber has a thermal conductivity matched to the rate at which the coke accepts heat. Magnesite has been found to have appropriate thermal conductivity. This material at the lower end of the coking range, namely 1200.degree. C, is impractical due to the fact that it develops cracks and flakes off. However at the higher end of the desired coking range, namely 1300.degree.-1400.degree. C, these difficulties do not appear, and the use of the material leads to increased output of the furnace. More particularly according to the invention firebrick is used which has a thermal conductivity of 2.0-6.0kcal/mh.degree. C and is composed of 20-45% SiC, 23-57% Al.sub.2 O.sub.3 with the remainder consisting of SiO.sub.2 and traces of other oxides.