Abstract:
A transducer device for measuring the internal pressure in pipes, comprises two housing parts which are articulately connected with one another by a connecting element and adapted to be fixedly mounted on the pipe by means of a clamping device. Each housing part contains at least one measuring element with a bipolar take-off of the test signals. At least one pole of each take-off is electrically conductingly connected with a part of the connecting element which is electrically insulated relative to the other pole and the connecting element comprises connection terminals for the further conduction or transmission of the test signals. The other pole is potentially in direct connection with the pipe. Thereby, a convenient and easy way is created for achieving electric compensation of the interfering signals within the transducer itself, thus replacing the separate, in each case bipolar conduction of the test signals out of the two housing parts with a combined, now altogether bipolar outgoing lead for the fully compensated test signals from the transducer.
Abstract:
An analyzing apparatus primarily designed for the analysis of body fluids, includes a feeding device, a measuring unit formed by a string of measuring cells linked by a channel, and a waste disposal unit for removal of the samples analyzed. Such an analyzing apparatus may be tailored to suit specific purposes by providing the measuring unit, or at least parts thereof, as modular units, which can directly be coupled to the feeding device and the waste disposal unit via a separate control block.
Abstract:
An electrochemical measuring apparatus may be charged with an option of several media by providing a feeder part with the respective media connections, and by guiding a piece of pipe in a bore, which is sealed off and is movable relative to this feeder part. On its end facing away from a measuring chamber in the apparatus, the piece of pipe has a connection for additional media. Besides, it carries at least one circumferential bore which may be brought to coincide with at least one of the input openings into the bore connecting to the feed lines, by means of a relative motion - preferably controlled via a stepping motor - between the pipe piece and the above bore.
Abstract:
A transducer for measuring the internal pressure in pipes, preferably injection pipes of diesel engines by determination of pipe deformations, comprises a rigid housing enclosing the pipe in which the pressure is to be measured, and at least one elastic sensor element arranged inside the housing and adjacent to at least a part of the circumference of the pipe. The sensor element and the housing are detachably mounted on the pipe and between the housing and the sensor element there is arranged an endorsing element elastically forcing the sensor element against the pipe whereby deformations of the pipe are transmitted frictionally to the sensor element.
Abstract:
A multi-wire oxygen electrode and method of manufacturing the same, said electrode having a reactive electrode surface formed by a glass electrode tip having an end surface and a number of electrode wires are distributed in the end surface of the electrode tip along a circle. The cross-sectional surfaces of said electrode wires are freely exposed in such end surface and the electrode wires are fused in the electrode tip and electrically conductively connected with a cathode wire arranged in a glass sleeve. There is provided a substantially semi-spherical shaped support surface having an apex, said support surface being coaxially arranged with respect to the electrode tip, and said cathode wire being held in the electrode tip at the apex of the support surface. The electrode wires are electrically conductively secured at the cathode wire at the apex of the support surface, each electrode wire being guided through a substantially one-quarter arc over the support surface and then substantially parallel to the longitudinal axis of the electrode tip to its end surface.
Abstract:
A method for analyzing the driving behavior of motor vehicle wherein a car's driveability is measured easily on a test stand by conducting tests with an actual vehicle to obtain measurement variables describing driving behavior; then defining at least one rating (Dr) indicating the car's driveability as a function of one or more measurement variables; then preparing a simulation model to represent dependencies between the individual measurement variables and, in particular, to compute the rating (Dr) from a set of predefined measurement variables which can be obtained both from the actual vehicle and on a test stand; and then calibrating a dynamic test stand with the use of the simulation model.
Abstract:
In order to produce a small-volume flow measuring cell with good flow characteristics in a sensor device for determining the concentration of a substrate in a sample medium, comprising an enzyme electrode which is covered by a membrane and a reference electrode, both of which are in contact with the measuring cell, the proposal is put forward that the reference electrode be located outside of the membrane cover of the enzyme electrode and that the maximum extension of the flow measuring cell normal to the flow direction of the sample medium essentially be the same as the diameter of the sensitive layer of the enzyme electrode.
Abstract:
A pressure measuring device is provided with a change-over valve connecting the pressure sensor either with the pressure to be measured or with a reference pressure. The change-over valve is actuated by a separate control pressure and will protect the pressure sensor from the influence of the pressure medium to be measured in the spring-loaded idle position of the valve.