摘要:
An apparatus for ascertaining, and/or monitoring, volume- or mass-flow of a medium flowing through a pipeline in the direction of the longitudinal axis of the pipeline. The apparatus includes: at least one ultrasonic sensor, which radiates/receives ultrasonic measuring signals at an angle of incidence/emergence into/out-of the pipeline; and a control/evaluation unit which provides, based on the ultrasonic measuring signals, information concerning volume- and/or mass-flow of the medium through the pipeline. The ultrasonic sensor includes at least one sound-producing element, a coupling shoe and a coupling adapter. The end region of the coupling adapter facing the coupling shoe has a securement mechanism for releasable securement of the coupling adapter to the coupling shoe. The end region of the coupling adapter facing the pipeline is embodied as a function of the pipeline in such a manner that it is form-fittingly securable to the pipeline.
摘要:
An ultrasonic, flow measuring device having a plurality of measuring channels. At least one ultrasonic sensor is situated in a first region of a pipeline, or measuring tube; at least two ultrasonic sensors are situated in a second region of the pipeline (5), or measuring tube, in such a manner that the ultrasonic measuring signals travel through the pipeline, or measuring tube, in, or opposite to, a stream direction of the medium, on sound paths of different lengths. A transmitting stage simultaneously excites the ultrasonic sensor, or the ultrasonic sensors, of the first or second region for transmitting the ultrasonic measuring signals. Due to the different lengths of the sound paths, the receiving stage detects the ultrasonic measuring signals incoming to the ultrasonic sensors of the second or first region at separate times. The evaluating stage ascertains, on the basis of travel-time difference of the ultrasonic measuring signals on the individual sound paths, in, and opposite to, the stream direction, volume- and/or mass-flow of the medium in the pipeline, or measuring tube.
摘要:
A device for determining and/or monitoring volume and/or mass flow rate of a medium that flows in a direction of flow through a pipeline/measuring tube of inner diameter. The device comprises at least two ultrasonic transducers that emit and/or receive ultrasonic measuring signals along defined sonic paths and a control/evaluation device which determines the volume flow rate and/or the mass flow rate of the medium to be measured inside said pipeline/measuring tube based on the ultrasonic measuring signals according to the travel-time difference principle. In order to provide a multichannel ultrasonic flowmeter, at least one reflector element is placed in the interior of the pipeline/measuring tube. The reflector element has a defined distance from the inner surface of the pipeline/measuring tube and is placed within the sonic path of the ultrasound measuring signals running through the pipeline/measuring tube.
摘要:
In a measuring head for an ultrasonic flowmeter, ultrasonic coupling element 40 and measuring head housing 10 are cast together and form, along with the casting material 50, a contact surface E, which allows an effective transfer of heat to the measuring head 2. In order to compensate manufacturing tolerances, the distance a between the measuring head housing 10 and the ultrasonic coupling element 40 is at least 1 mm in the area of the contact surface E.
摘要:
Provided are embodiments of a mobile communication terminal with a data generation unit arranged for generating a data stream, a data serialization unit arranged for segmenting the data stream into at least two distinct data packets, and a channel broker unit. The channel broker unit is connected to the serialization unit to receive the at least two data packets and to select for each of the data packets a bearer channel out of at least two different bearer channels.
摘要:
Flow measuring device for ascertaining flow of a measured medium flowing through a measuring tube, which flow measuring device has a first housing for protruding into the measured medium, wherein the first housing has a first surface intended to face the measured medium, wherein the flow measuring device includes a second surface for bounding the measured medium, and wherein each separation between the first surface for bounding the first housing from measured medium, the second surface for bounding the measured medium and the first surface of the first housing amounts to at least 1 mm.
摘要:
The present invention relates to an improved process for the production of prostaglandins and prostaglandin analogs. In particular, this invention relates to the production of prostaglandins of the PGF2α-series, including latanoprost, travoprost, and bimatoprost, which are active pharmaceutical ingredients used for the reduction of elevated intra-ocular pressure in patients with glaucoma and ocular hypertension.
摘要:
A perpendicular magnetic recording media is provided having an imbalanced magnetic moment multilayer cap. The perpendicular magnetic recording media comprises a granular layer, and a multilayer cap structure exchange coupled to the granular layer. The multilayer cap structure includes upper and lower magnetic layers separated by a non-magnetic layer, where the upper magnetic layer has a magnetic moment greater than the lower magnetic layer. When an external field is applied to the recording media, a larger moment torque is triggered at the surface, and more efficient switching is facilitated. The upper magnetic layer may have a higher magnetic moment than the lower magnetic layer if the upper magnetic layer comprises a larger magnetic moment material than the lower magnetic layer. The upper magnetic layer may also have a higher magnetic moment than the lower magnetic layer if the upper magnetic layer has a greater thickness than the lower magnetic layer.
摘要:
A perpendicular magnetic recording medium includes a metamagnetic antiferromagnetically-coupled (AFC) layer between the recording layer (RL) and the soft magnetically permeable underlayer (SUL). The metamagnetic AFC layer has essentially no net magnetic moment in the absence of a magnetic field, but is highly ferromagnetic in the presence of a magnetic field above a threshold field. Thus the metamagnetic AFC layer does not contribute to the readback signal during reading, but channels the write field to the SUL during writing because the threshold field is selected to be below the write field. An exchange-break layer EBL is located between the metamagnetic AFC layer and the RL. The metamagnetic AFC layer contains films with a crystalline structure suitable as a growth template for the EBL and RL, so the metamagnetic AFC layer also functions as part of an “effective EBL”, thereby allowing the actual EBL to be made as thin as possible.
摘要:
A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.