Virtual sensing device, simulation method and simulation system

Abstract

The invention discloses a virtual sensing device, a simulation method and a simulation system, and belongs to the field of computer aided design, the virtual sensing device is used for simulating a real object sensor in dynamic impact simulation, reading physical quantity and deformation quantity of a real object in the dynamic impact simulation, and establishing a virtual sensor according to the physical quantity and the deformation quantity, and according to the virtual sensor, an internal hollow cube unit is used for simulating a real sensor shell, and a built-in tetrahedron unit is used for simulating the internal structure of the sensor. When the device is used, the virtual sensing device is placed at a preset position of a measured part in a dynamic impact simulation model, and a pasting set comprising one surface of a cube of the virtual sensing device and the measured part is established; and a local coordinate system of the virtual sensing device is established, an impact condition is loaded to carry out dynamic impact simulation, and a physical quantity output by the monitoring point of the virtual sensing device and a deformation quantity of the monitoring point of the virtual sensing device in the local coordinate system are obtained. Acceleration, speed and intrusion amount data can be directly measured, and model modification is facilitated.

Description

technical field [0001] The invention belongs to the field of computer-aided design, and more specifically relates to a virtual sensor device for simulating physical sensors in simulation, extracting data such as acceleration, speed, and intrusion, and a method for using the same. Background technique [0002] At present, with the development of computer technology, finite element simulation analysis is widely used in the performance verification of automobile product development because of its low cost, strong repeatability, and easy simulation of various test conditions. Therefore, accurate, fast, and convenient acquisition of physical quantities such as acceleration, velocity, and displacement at predetermined positions in the simulation plays an important role in evaluating the feasibility of the scheme. [0003] The existing scheme mainly explains the amount of collision simulation intrusion. A point that does not deform during the collision process is selected at the re...

AI Technical Summary

Problems solved by technology

The existing scheme generally points out that a base point should be selected in the non-deformation area, but the specific location and method of base point selection are not specified. If different base points are selected, due to the influence of factors such as slight deformation, tail lift and rotation of the whole vehicle, it will lead to intrusion. There is a certain difference in the measurement of the quantity; the spring unit can only measure the intrusion data, but cannot measure the acceleration and velocity data; the connection of the spring unit depends on the grid nodes in the simulation model. If the model is modified, it needs to be reconnected, which is cumbersome and easy to operate. go wrong

Images