摘要:
An ultrasonic, flow measuring device, which includes a measuring tube having a straight measuring tube axis, a transmitter for sending an acoustic signal on a first signal path, a receiver for receiving the acoustic signal on the first signal path and at least a first reflection surface, on which the acoustic signal is reflected at least once on the first signal path. The acoustic signal incident on the first reflection surface propagates along a first straight subsection, which has a first separation from the measuring tube axis, wherein the transmitter, the receiver and the first reflection surface are so oriented relative to one another and arranged in or on the measuring tube that the acoustic signal on the first signal path from the first transmitter to the first receiver is so reflected on the at least a first reflection surface that the acoustic signal reflected on the first reflection surface propagates through the measuring tube on the first signal path along a second straight subsection. A surface normal to the first reflection surface has an angle relative to the measuring tube axis, which is other than 90°.
摘要:
A method for manufacturing an ultrasonic, flow measuring device, characterized by method steps as follows: selecting a number larger than one of straight subsections of the first signal path, which should have different distances from the measuring tube axis; establishing the distances of the straight subsections from measuring tube axis; calculating values of lengths of the straight subsections, as projected on the measuring tube axis, as a function of the number of straight subsections with the same distance from the measuring tube axis and the respective distances from the measuring tube axis; and inserting the at least a first reflection surface in the measuring tube such that the acoustic signal on the path from the first transmitter to the first receiver is so reflected on at least the first reflection surface that the first signal path comprises the straight subsections with the selected distances and the calculated values of the lengths as projected on the measuring tube axis.
摘要:
Please replace the abstract that appears on page 32 of the specification with the following revised abstract which is submitted on a separate sheet.
摘要:
An sensor of a measuring system for determining and/or monitoring the flow of a measured medium through a measuring tube, wherein the ultrasonic sensor is seated in a shiftable manner in a sensor housing parallel to a first inner surface of the sensor housing. The ultrasonic sensor has a coupling element and an electromechanical ultrasound transducer element, wherein the ultrasonic sensor can, at least at times, at least partially, lie against the first inner surface of the sensor housing, and that a guide hanger at least partially lies against a second inner surface of the sensor housing lying opposite the first inner surface, wherein the ultrasonic sensor is seated in a shiftable manner essentially perpendicularly to the first inner surface in the guide hanger, and wherein a spring between the guide hanger and ultrasonic sensor acts essentially perpendicularly to the first inner surface.
摘要:
A measuring system and method for determining and/or monitoring the flow of a measured medium through a measuring tube with a first ultrasonic sensor and at least a second ultrasonic sensor. The first Ultrasonic sensor is placeable in a first region of the measuring tube, and the second ultrasonic sensor is placeable in a second region of the measuring tube. The ultrasonic signals transmittable through the measured medium from the first ultrasonic sensor are receivable by the second ultrasonic sensor, and the ultrasonic signals transmittable through the measured medium from the second ultrasonic sensor are receivable by the first ultrasonic sensor. A control/evaluation unit ascertains the volume flow and/or the mass flow of the measured medium flowing in the measuring tube by means of a travel-time difference method.
摘要:
This invention relates to processes and intermediates for the stereoselective alkylation of carbonyl groups. The invention in particular allows the stereoselective preparation of the antidepressant drug escitalopram. It has been found that boric or boronic acid derivatives are useful bridging elements for the attachment of a chiral group to a compound containing a carbonyl group to be alkylated. The said borates and boronates are thus useful in a process for the asymmetric alkylation of a carbonyl group in a compound containing a carbonyl group and an anchor group capable of reacting with a boric or boronic acid derivative. The asymmetric alkylation can be carried out by admixing the compound containing a carbonyl group to be alkylated and the anchor group capable of reacting with a boric or boronic acid derivative with a boric or boronic acid derivative, adding a chiral alcohol, and adding an organometallic compound. After the alkylation reaction, the borate and boronate can be easily removed by hydrolysis.
摘要:
An apparatus for securing a measuring or display unit on an object. Included is elongated guide element, on which an orientation aid and a holder for the measuring unit or for the display unit are arranged shiftably in the longitudinal direction of the guide element, wherein the orientation aid and the holder are so positionable relative to one another, that the object is held clamped between the orientation aid and the holder or a mounted sensor, and wherein a resilient tensioning apparatus is provided, with which the measuring or display unit is pressable with a defined clamping force onto the object.
摘要:
A method for ascertaining and/or monitoring a process variable, wherein a time-limited, exciting signal, which is described by at least one desired quantity, or by a desired signal form, is applied to a first piezoelectric element, or to a first polarized zone of a piezoelectric element. The response signal, which is described by at least one actual quantity, or actual signal form, corresponding, respectively, to the desired quantity, or desired signal form, is registered by a second piezoelectric element, or by a second polarized zone of the piezoelectric element, wherein the actual quantity, or the actual signal form, of the response signal and the desired quantity, or the designed signal form, of the response signal are compared with one another. On the basis of the ultrasonic measuring signal, which is describable by the defined desired quantity, or the defined, desired signal form, the process variable is ascertained via a sound-entrainment method or via an echo method.
摘要:
A method for system- and/or process-monitoring in the case of an ultrasound flow measuring device having a plurality of measuring channels, wherein a medium flows though a pipeline or measuring tube in the direction of a longitudinal axis of the pipeline or measuring tube. Ultrasonic measuring signals are coupled into the pipeline or measuring tube and coupled out of the pipeline or measuring tube in such a way that they travel through the medium along different sound paths. Following passage through the pipeline or measuring tube, the ultrasonic measuring signals are detected in the individual measuring channels, wherein at least one actual quantity describing the ultrasonic measuring signal of each measuring channel is ascertained. The actual quantity is compared with a desired quantity captured under predetermined system- or process-conditions, and a report is output in the case of a difference between the ascertained, actual quantity and the captured, desired quantity.
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.