174 results about "Gravitational force" patented technology

The invention discloses an intelligent ship autonomous collision avoidance whole process path planning method, which comprises the following steps: establishing an error distribution model of a fusion target according to dynamic information and static information of a target ship, and analyzing to obtain a classification model of the target ship; according to the classification model of the target ship, combining a quaternary ship domain model to establish a ship domain model of dynamic and static obstacles; establishing local path planning based on an artificial potential field method, establishing a repulsive force field around an obstacle in the ship domain model, establishing a gravitational field at a target point, introducing a global path return mechanism, and establishing a local collision avoidance path planning algorithm considering the return mechanism; gravitational force self-adaptive adjustment is achieved based on the current ship path deviation degree and the current ship navigation deviation degree, a dynamically-optimized local collision avoidance path planning algorithm considering a self-adaptive homeward voyage mechanism is formed, and path planning of the ship is conducted. After collision avoidance of the ship, the ship is controlled to return to the global route reasonably and efficiently, and the navigation safety and efficiency of the ship are guaranteed.

The invention discloses a satellite time-varying gravity field inversion method based on adaptive de-mixing, and belongs to the technical field of satellite gravity measurement. Constructing a normal equation; accumulating the normal equations and solving parameter initial values through a weighted least square method; calculating a post-test residual error of the observation value and recovering a pre-elimination parameter; applying zero mean constraint to the daily time-varying gravity field parameters; establishing an autoregressive model to describe time correlation of the day solution sequence, applying autoregressive model constraint, updating a normal equation and jointly solving a time-varying gravity field model; outputting a daily time-varying gravity field model and a monthly time-varying gravity field model according to a parameter estimation result; evaluating the time-varying gravity field model through spectral domain analysis; according to the satellite time-varying gravity field inversion method based on self-adaptive de-mixing, self-adaptive de-mixing errors can be achieved, the stability and precision of time-varying gravity field inversion are improved, and the influence of background model mixing errors in satellite time-varying gravity field inversion is effectively weakened.

The invention discloses a small Reynolds number liquid film flow simulation method, which comprises the following steps of: deducing normal stress, shear stress balance conditions and motion boundary conditions on the surface of a liquid film under the action of gravity, airflow shear force and evaporation effect according to a flow physical model; non-dimensionalization and simplification are carried out on the non-slip boundary condition of the wall surface, the mass equation and momentum equation of the flow and the boundary condition of the surface of the liquid film; for small Reynolds number flow, derivation is carried out based on a long wave theory method, and a differential equation of liquid film thickness evolving along with time and space under the synergistic influence of gravity, airflow shear force and evaporation effect is obtained; carrying out weak nonlinear evolution analysis of fluctuation on the differential equation to obtain a change relation of the instability growth rate of the fluctuation along with gravity, airflow shear force and evaporation effect, and giving a change image of the influence of the airflow shear force and the evaporation effect on the instability growth rate of the liquid film fluctuation.

The invention belongs to the technical field of spaceflight measurement and control and artificial intelligence, and particularly relates to a high-precision low-orbit satellite forecasting method and system, and the method comprises the steps: obtaining the observation data of a low-orbit satellite, and the parameter data of the earth center gravitational force and non-spherical gravitational force perturbation; the method comprises the following steps: decomposing observation data of a low-orbit satellite into long-term trend data, medium-term fluctuation data and short-term change data; constructing a long-term dynamic model, and fitting the long-term trend data and the long-term dynamic model to obtain a long-term fitting result; constructing a medium-term dynamic model, and fitting the medium-term fluctuation data and the long-term dynamic model to obtain a medium-term fitting result; constructing a short-term dynamic model, and fitting the short-term change data with the short-term dynamic model to obtain a short-term fitting result; fusing the fitting results to obtain a satellite orbit state fitting result; and updating parameters of all the dynamic models, and calculating orbit forecast information of the low-orbit satellite. And the orbit forecasting precision of the low-orbit satellite is effectively improved.

An accumulator includes: an exterior body including a bottom, a shell and a port; and a bellows provided inside the exterior body and having an S-shape being capable of expansion and contraction. In a case where the bellows has expanded maximally in the accumulator, the bellows has expanded from a free state where no load other than gravitational force is being applied to the bellows.

The invention discloses a gravitational field inversion method considering unsteady noise of a satellite gravity observation value. The gravitational field inversion method comprises the following steps: A, acquiring original observation data of a gravity satellite; b, setting observation value noise as white noise, and constructing a random model considering non-stationary noise; c, performing parameter estimation to obtain a post-test residual error of an observation value; d, estimating the noise auto-covariance and precision factor matrix of the observation value based on the post-test residual error of the observation value; e, repeating the steps C and D for iteration to realize refinement of the gravitational field parameter and observation value random model; and F, evaluating the time-varying gravity field model in the spectral domain. According to the invention, the defects in the prior art can be improved, and the precision and stability of gravitational field inversion are improved.

The embodiment of the invention provides a time-space reference synchronization method and device for a multi-satellite cooperative task, and the method achieves the precise time synchronization of a multi-satellite system through constructing a verification system which comprises a pulse per second controller, a simulation industrial control computer and a verification server, and building a pulse transmission time delay compensation model. A multi-source navigation information fusion algorithm is innovatively designed to obtain high-precision space-time reference data, and a preset data frame format is adopted for unified broadcasting. According to the system, a complete dynamic model considering non-spherical gravitational perturbation, sun-moon gravitational force, atmospheric resistance and light pressure effects is established, accurate updating and synchronous broadcasting of the relative motion state of multiple satellites are achieved in combination with a torque parameter conversion mechanism of a control instruction, and a reliable cooperative control verification scheme is provided for complex space tasks.

The invention discloses a dynamic coupling model generation method. The method comprises the following steps: setting a reference point and arranging an observation pillar; transmitting the reference gravity value to an observation pillar; acquiring space pose change data and three-dimensional coordinate data of the marker; obtaining relative gravity combined measurement data through relative gravity combined measurement; calculating the three-dimensional displacement of each observation pillar based on the spatial pose change data; fusing the reference gravity value, the relative gravity combined measurement data and the three-dimensional coordinate data to construct a gravity gradient field tensor model; systematically integrating the three-dimensional displacement, the gravity gradient field tensor model and the three-dimensional coordinate data to form a space correlation framework; and on the basis of a physical coupling mechanism of constraint displacement and gravity gradient of the conditional least square model, combined adjustment calculation is carried out to generate a dynamic coupling model of interaction of the deformation field and the gravity field. Space-time reference unification of displacement and gravity data is realized, rotation errors and local interference are eliminated, the reliability of a gravity gradient field is enhanced, and a coupling mechanism of deformation and gravity is physically constrained.

The invention provides a method for measuring the gravity center of a large component based on a distributed six-dimensional force sensor. The method specifically comprises the steps that firstly, the six-dimensional force sensor is installed below a spherical hinge of a positioner and used for measuring the contact force and friction torque of the spherical hinge; then, according to the conversion principle of force and torque between coordinate systems, the acting force and torque of the positioner on the large component and the gravity and gravitational torque of the large component are converted into the base coordinate system, and therefore a torque balance equation of the large component in the base coordinate system is established; and finally, adjusting the spatial attitude of the large component, and solving the center-of-gravity position by adopting a least square method according to the moment balance equation of the large component under different attitudes. According to the method of the scheme, aiming at the influence of the friction torque of the spherical hinge on the gravity center measurement precision during the gravity center measurement of the large component, the friction torque of the spherical hinge during the posture adjustment of the large component can be calculated, so that the gravity center measurement precision of the large component is improved.

This system has a long cylinder that is mounted on the chassis and body. A piston moves inside the cylinder, which has blades on both sides. These blades have a rack on one side that is embedded to entangled with the gears.At the top and bottom of the cylinder, there are two gears, and every time the piston moves and reaches the top or bottom of the cylinder, the rack of the piston blade approaches the gear and induces them to move.

The invention relates to a large underground cavern group crustal stress field inversion method under a complex geological condition, and provides a method for inversing a crustal stress field of a large underground cavern group by taking a river valley center line or a ridge line as an inversion numerical model boundary to solve the problems that underground cavern group crustal stress measured data is discrete and difficult to accurately predict under the background of deep river valley terrain and multi-fault development. And selecting actual measurement points which are far away from the fault and are in three-dimensional distribution. The method comprises the following steps: acquiring a displacement boundary and a gravitational acceleration magnitude of a three-dimensional numerical model through limited measured data by adopting stepwise multiple linear regression and evolutionary neural network joint inversion, positively loading the displacement boundary and the gravitational acceleration magnitude to a model boundary to obtain a regional crustal stress field, and extracting measured point data for preliminary verification; and simulating caving excavation, and analyzing whether the stress concentration area is consistent with the observed stress type damage position or not. The method integrates the advantages of the two methods, more optimal solutions can be selected, the problem that precision and calculated amount are difficult to consider in stress field prediction of the complex structure motion area is solved, and the method is suitable for crustal stress field prediction of the complex structure area.

The invention discloses a critical parameter prediction method for a vertical cantilever fluid conveying pipe comprising a water injection pump and a Y-shaped nozzle, and relates to the field of fluid conveying pipe critical parameter calculation. The prediction method is based on an Euler-Bernoulli beam model and a momentum theorem, bending force, centrifugal force, Coriolis force, inertia force, gravity and additional force generated by an elbow are comprehensively considered, and an oscillatory differential equation of the fluid conveying pipe is established. The method comprises the following steps: performing dimensionless processing on an oscillatory differential equation by introducing dimensionless parameters, deducing a characteristic equation, a characteristic function and a characteristic value under a cantilever boundary condition, converting a partial differential equation into an ordinary differential equation set, and performing matrix solution; and finally, accurate prediction values of the critical flow velocity and the critical frequency can be obtained. The method can effectively reflect the influence rule of the nozzle and the concentrated mass on the vibration characteristics of the fluid conveying pipe, and realizes the accurate prediction of the critical parameters of the vertical cantilever containing the concentrated mass belt Y-shaped nozzle fluid conveying pipe.

The invention provides a boundary force control method and device based on gravitational equilibrium, equipment and a medium, and relates to the technical field of medical instruments. The method comprises the steps that current position information of a joint in a mechanical arm of a master console is obtained, and whether the joint enters a preset limiting buffer area or not is judged based on the information; and if so, dynamically generating a boundary force for preventing the joint from moving towards the mechanical hard limit based on the current position information and the gravitational equilibrium force of the joint. The boundary force is dynamically generated based on the current position information by setting the limiting buffer area room and taking the gravity balance force as the basis, it is ensured that generation of the boundary force is naturally matched with the joint load, and the reliability problem caused by parameter mismatching is reduced; meanwhile, as the boundary force directly derives from internal force adjustment, when the joint retreats from the limiting buffer area, the impedance force can be smoothly converged along with the position change, the residual interference force of traditional control is effectively eliminated, and therefore the reliability of preventing the joint from colliding with the hard limiting area is remarkably improved.

The invention discloses a rapid modeling method of a carrier rocket rigid-elastic-shake coupling model, which comprises the following steps of: establishing a motion equation of a carrier rocket: establishing a mass center motion equation of the carrier rocket according to a Newton's second law, establishing a motion equation around the mass center of the carrier rocket according to a moment of momentum theorem relative to the mass center, and simplifying the carrier rocket into a one-dimensional beam model; establishing an elastic vibration equation; solving force, torque and generalized force thereof; solving expressions of gravity, thrust, control force, engine swing inertia force, aerodynamic force, aerodynamic damping force, wind disturbance force, force, torque and generalized force thereof; propellant shaking is analyzed by adopting a spring-mass-damper equivalent model; propellant shaking equations in the pitching direction and the yawing direction of the carrier rocket are established, and inertia force, inertia moment and generalized force generated by propellant shaking are established; the obtained various forces, moments and generalized forces and inertia forces, inertia moments and generalized forces generated by shaking of a propellant are substituted into a motion equation of the carrier rocket to obtain a mass center motion equation, the motion equation of the rocket is around the mass center, and a six-degree-of-freedom nonlinear total dynamical model of the carrier rocket is established when the rocket tilts and tilts; elastic vibration equations in three directions of yawing and rolling are established; and solving the carrier rocket rigid-missile-shake coupling model. According to the method, rapid numerical simulation can be carried out on the carrier rocket rigid-missile-shake coupling model, the influence of a solving result on carrier rocket attitude change is analyzed, and a foundation is laid for navigation and attitude control design of the carrier rocket.

A power closure member actuation system for moving a closure member of a vehicle is provided. The system includes an actuator configured to move the closure member relative to a vehicle body and a closure member accelerometer configured to determine a steady state gravitational force on the closure member according to an orientation of the vehicle. A controller is configured to determine the steady state gravitational force on the closure member using the closure member accelerometer while the closure member is in a predetermined position and is not moving. The controller is also configured to control movement of the closure member by the actuator to compensate for variable gravitational forces on the closure member during movement of the closure member. The variable gravitational forces used to control the movement are predetermined and selected according to a position of the closure member and the steady state gravitational force.

The present invention discloses a method, device, equipment and storage medium for obstacle avoidance in UAV cluster formation. A new artificial potential field model is obtained by using a new potential field function. In this model, an influence factor of the distance from the current position to the final target is added to the repulsive force field potential function. The modified potential field function has no point where the resultant force is 0 except at the target point, and there will be no situations of being unreachable and local minimum. The repulsive force coefficient and the gravitational force coefficient are determined based on experience. If the repulsive force coefficient is small, the UAV is close to the obstacle and there is a risk of hitting the obstacle. If the repulsive force coefficient is large, the flight distance of the UAV is increased, resulting in waste of energy. Therefore, this method adopts a method of adaptively modifying the repulsive force coefficient, which can optimize the repulsive force coefficient according to the current motion state of the UAV, and minimize the flight distance of the UAV under the condition of ensuring safe flight.

The invention relates to the technical field of geophysical exploration, in particular to an along-curved-surface gravitational field inversion method and device based on a target layer, and the method comprises the steps: taking a target layer curved surface of a target region as a constraint, peeling off a shallow-layer residual gravity anomaly field in a Bouguer gravity anomaly field of the target region layer by layer, and subtracting a region gravity anomaly field below the target layer to obtain a gravity anomaly field; obtaining a residual gravity anomaly field of the target layer curved surface; and in combination with the fluctuation degree of the curved surface of the target layer, performing inversion on the residual gravity anomaly field of the curved surface of the target layer by using deconvolution to obtain a density superposition field of the curved surface of the target layer. According to the method, a new along-curved-surface gravity field inversion method is established, depth parameters of a target layer curved surface are considered during inversion calculation, interference signal influences are eliminated, a density field signal along the curved surface is obtained, a density superposition field of the target layer curved surface is obtained, and an oil-gas-water enrichment area is depicted for follow-up density change interface prediction and oil-gas-water enrichment area depicting. And a basis is provided for providing reference suggestions for well position deployment and production regulation and control.

The invention is suitable for the technical field of automatic driving, and provides a dynamic Riemannian manifold artificial potential field obstacle avoidance method based on PPO reinforcement learning, and the method comprises the steps: dividing obstacles into three classes: pedestrians, vehicles and static obstacles through a target detection algorithm, and determining the risk distribution characteristics of each class; secondly, a 11-dimensional high-dimensional space-time state space is constructed, and risk pre-judgment is achieved; a PPO reinforcement learning algorithm is introduced, a high-dimensional state is used as input, four-dimensional potential field deformation parameters for three types of obstacles are output, and a differentiated continuous potential field form is autonomously learned; constructing a covariance matrix based on Riemannian geometry, generating a non-abrupt-change anisotropic repulsion field, and superposing a virtual escape force to crack a local minimum value; and synthesizing the gravitational force, the total repulsive force and the escape force to obtain a total potential field force, and outputting a steering angle and acceleration instruction conforming to vehicle dynamics constraints. According to the strategy, a complete obstacle avoidance framework is constructed, and the technical limitation of a traditional scheme is effectively relieved.

An apparatus comprised of positionally directable masses attached to a binding component that includes a coupling device for payload to reduce gravitational deviation of the apparatus' trajectory by alternatingly accelerating and retracting physically bound component masses in equal and opposite directions to the extents of their bindings, initially and optimally perpendicular to the gravitational field and perpendicular to the apparatus trajectory by using in built transduction componentry located within the masses or the binding componentry or both that utilises electromagnetic forces, forces generated by chemical reactions, or other applied or responsive motive force to positionally direct the bound directable masses.

The invention relates to a method and a device for acquiring a gas-water gravitational differentiation behavior in an oil reservoir considering an oil layer dip angle, and relates to the technical field of oil-gas field development. Comprising the following steps: based on a maximum distance criterion of migration of a gas-water mixed displacement area along an inclined displacement direction by a complete gravitational differentiation distance and a vertical water-drive reservoir thickness criterion after complete gas-water differentiation by a complete differentiation thickness or height; according to the water phase flow, the gas phase flow, the flow of the gas-water mixing area, the total flow, the gas flow-total flow of the injected fluid, the water flow-total flow of the injected fluid, the thickness of the oil reservoir, the water vapor and the gas-water differential velocity, a gravitational differential model of the oil reservoir is obtained; and inputting the basic parameters of the target water-gas alternate injection inclined oil reservoir into the oil reservoir gravitational differentiation model for calculation to obtain a gas-water gravitational differentiation behavior result of the target oil reservoir. According to the acquisition method provided by the invention, efficient prediction of the gravitational differentiation behavior of the oil reservoir developed by alternately injecting water and gas is realized.

An intermediate axis theorem demonstration device for teaching the intermediate axis theorem includes an object, an actuator, and a levitation module. The object has a primary, secondary axis, and intermediate axes of rotation, each having moment of inertia with that about the intermediate axis being greater than that about the secondary axis and less than that about the primary axis of rotation. The actuator is releasably engageable to the object to initiate rotation of the object about its intermediate axis. The object is selectively positionable upon the levitation module, which counteracts a gravitational force upon the object to maintain the object in a substantially fixed position while rotating about its intermediate axis of rotation. An observer thus can observe rotation of the object about its intermediate axis of rotation and intermittent 180° rotation of the object about its primary axis of rotation.

A folding bed, such as a sofa bed, with an assembly configured to counteract the gravitational forces acting on both a rotation of the main panel in relation to the frame and a rotation of the foot panel in relation to the main panel. A transmission may be used in the assembly to connect the first pivotal connection, where the main panel pivots with respect to the frame, to the second pivotal connection, where the foot panel pivots with respect to the main panel. The transmission transmits torque from the first pivotal connection to the second pivotal connection, so as to counteract gravitational forces acting on the foot edge of the foot panel.

Systems for measuring temporally resolved flow processes are known, comprising a rotational displacer (18) arranged in a gas line (10) between an inlet (12) and an outlet (14), a translational pressure difference sensor (26), which is arranged in a bypass line (16) bypassing the rotational displacer (18) and which comprises a displacement body (30) that is translationally movable in a measurement chamber (28), a detection device (32) that records the deflection of the displacement body (30) in the measurement chamber (28) and is connected to a control and evaluation unit (24), and a drive motor (20) via which the rotational displacer (18) is driven in a manner regulated via the control and evaluation unit (24) as a function of the measured values of the detection device (32). In order to be able to use these systems for measuring gases as well, it is proposed that the displacement body (30) comprises a body part (42) which is produced from a diamagnetic material and interacts with a magnetic field which is generated by magnets (40) in the measurement chamber (28) and which has an alternating polarity in a width direction (Y), which is directed perpendicularly to the displacement direction (X) of the displacement body (30) and perpendicularly to the gravitational force (Z), and has a constant polarity in the displacement direction (X).

This utility model discloses a stage lighting device for stage use, relating to the field of lighting technology. It includes a base, a first support rod, a lamp body, a first support seat, and a protective cover located directly above the lamp body. An elastic support component connects the upper end of the first support seat to the base, and a second support rod is fixed between the protective cover and the first support seat. Through the coordinated arrangement of the first support seat, the protective cover, and the elastic support component, under normal use, the compression spring is compressed under the weight of the base, the first support rod, and the lamp body, and the protective cover is located directly above the lamp body, without affecting the lighting effect. When the device accidentally tips over, the gravitational force of the base, the first support rod, and the lamp body is insufficient to keep the compression spring compressed. The spring returns to its original position under its own elastic force, placing the lamp body inside the protective cover, thus preventing the lamp body from colliding with external objects and better protecting it.

This application belongs to the field of geophysical exploration technology, specifically disclosing a three-dimensional gravity and magnetic field joint inversion method based on deep learning pre-optimization and model fine-tuning. Through this application, after determining the pre-optimized joint inversion network parameters, the pre-optimized three-dimensional gravity and magnetic field joint inversion result is determined based on the two-dimensional gravity observation data and the two-dimensional magnetic observation data to be predicted. The pre-optimized joint inversion network parameters are then adjusted, and the optimal three-dimensional gravity and magnetic field joint inversion result is determined based on the adjusted optimal joint inversion network parameters. By combining network pre-optimization and network parameter fine-tuning, the method retains the generalization ability of the pre-optimized joint inversion network parameters while mitigating the impact of deviations between the observation data to be predicted and the pre-trained features of the dataset. Finally, the optimal three-dimensional gravity and magnetic field joint inversion result is determined based on the adjusted optimal joint inversion network parameters, thereby effectively improving the accuracy and efficiency of the three-dimensional gravity and magnetic field joint inversion.

According to the method and device for in-situ survey of the water pressure borne by the underground structure, the value of the water pressure borne by the outer surface of a structure in an underground water-soil mixture on the unit area is measured according to the Newton's third law, namely the principle that acting force is equal to counter-acting force. Providing a measuring device at least comprising a survey hole, a load system and an underground water level control system; the acting force along the gravity direction is reduced in a step-by-step unloading mode, so that the measuring bottom plate tends to a static unbalance state and enters different self-stabilization balance states; along with the gradual increase of unloading, the counterforce of the soil spring in the reverse gravity direction is gradually reduced; recording the motion state of the measuring bottom plate under each stage of load, and obtaining a previous self-stabilization equilibrium state closest to the state by recording the violent floating motion state of the measuring bottom plate; the tiny soil reaction force in the self-stabilization equilibrium state is ignored, and according to a mechanical equilibrium equation, the total lower pressure value on the measurement bottom plate in the state is approximately taken as the underground water pressure value borne by the measurement bottom plate.

According to the method, a surface gravity wave and inner interface wave velocity potential field is analyzed into a product form of a vertical characteristic item and a horizontal diffraction field, and dimensionality reduction solution of a three-dimensional wave problem is realized; a vertical characteristic function orthogonal system meeting free liquid level, seabed boundary and interface coupling conditions is constructed, horizontal diffraction potential is decomposed into an incident field, a local column and an adjacent column scattering effect, and a Bessel function addition theorem is applied to construct a closed linear equation set of a multi-column interference field; establishing an extended dispersion equation containing density spring layer parameters, and revealing a modulation rule of layered strength on complex wave propagation characteristics; and finally, through tensor product coupling of a vertical mode and a horizontal diffraction field, constructing a full-three-dimensional diffraction velocity potential analytical solution, synthesizing a cross-layer pressure field integral by adopting a domain decomposition technology, and establishing a multi-column array generalized wave excitation force forecasting model. According to the method, efficient analytical calculation of the wave load of the multi-column system in the layered fluid is innovatively achieved.

The invention discloses a method for determining the gravity center of an object according to universal gravitation between the objects and calculating a universal gravitation constant according to the gravity center. In general physics, the mass of the object can be considered to be concentrated at one point which is called the gravity center of the object, and the gravity center of the regular object with uniform mass is in the geometric center of the object; when the universal gravitation technology is applied, the description has deviation, the patent points out the deviation, and the invention provides a method for determining the gravity center of the object through the universal gravitation between the objects: determining the gravity center of the object: when the object is attracted by the universal gravitation of other objects, the mass of the other objects can be considered to be concentrated at one point, and the gravity center of the object is determined; the universal gravitation resultant force on the mass of each part forming the object when the mass of the other object is concentrated at one point is equal to the universal gravitation of the other object on the object when the mass of the object is concentrated at the gravity center; on the basis that the gravity center of an object is determined, the invention discloses a method for calculating a universal gravitation constant through experiments such as a Cabendish torsion balance and the like.

The invention relates to a NMR spectrometer (10) comprising a permanent magnet arrangement (11) which comprises a measurement volume (12) and a bore (13) for introducing a NMR measurement sample in a sample cuvette (14) and a HF coil (15) outside a cylindrical temperature regulation tube (16) which comprises a continuous annular gap (17) through which a temperature regulation gas can be conducted through a gas inlet (18), characterized in that on the end opposite to the gas inlet a movable holding device (19) is mounted which in a first operating position does not touch the sample cuvette, in a second operating position holds the sample cuvette force-locked and / or form-locked on the outer circumference of the sample cuvette with an axially acting force or static friction F f in its measurement position and in a third operating position releases the sample cuvette for removal and in the second operating position applies F f >F Stau -F Gewicht , wherein F Stau denotes the buoyancy force generated by the dynamic pressure of the temperature regulation gas flowing onto the sample cuvette and F Gewicht denotes the gravitational force of the sample cuvette. By this it is possible to avoid the problems of the known generic arrangement by the dynamic pressure of the temperature regulation gas.