9 results about "Stress estimation" patented technology

The invention provides a seamless track blow-off locking miniaturized high-precision measurement method and device, and the method comprises the steps: collecting the rail seam opening degree and steel rail temperature data in real time, and constructing a state input vector; calculating the strain and equivalent stress of the steel rail based on the state input vector, and introducing a structural position sensitive correction term to improve the accuracy of stress estimation; the locking state in the rail seam diffusion process is identified through the lightweight gated loop network model by utilizing the time sequence data of the strain and the corrected stress, and a state classification label is output; and according to the state classification label and the corrected stress value, generating a locking operation suggestion, and providing a visual prompt for construction personnel through terminal equipment. According to the method, a stress estimation method is combined with a time sequence analysis algorithm, so that state judgment is converted from a static index to a dynamic trend, and the locking decision-making efficiency and reliability in the construction process are remarkably improved.

The stress estimation device acquires the awakening degree of the subject and calculates the feature amount of the acquired awakening degree. The feature amount of the awakening degree is, for example, a ratio at which the temporal change of the awakening degree is within a predetermined range, information defining a histogram showing the distribution of the temporal change of the awakening degree, and the like. Then, the stress estimation device estimates the stress from the calculated feature amount using the stress model.

An ophthalmic surgical system (100) includes an ophthalmic microscope (102) including a first camera (204a) and a second camera (204b). A controller (214) coupled to the first camera and the second camera receives a current pair of images including a current representations of a retina (300) of a patient; obtains a current three- dimensional representation of the retina from the current pair of images; determines deformation of the retina by evaluating the current three-dimensional representation relative to a reference representation of the retina; determines (414) stress on the retina according to the deformation; and outputs (418) guidance according to the stress. Stress may be determined using FEM and may use velocity and acceleration of the deformation. Guidance may include a graphical representation of the stress or a vector along which force should be exerted. Deformation may be detected (412) using a mesh (312) projected (406) onto the retina.

An ophthalmic surgical system includes an ophthalmic microscope including a first camera and a second camera. A controller coupled to the first camera and the second camera receives a current pair of images including a current representations of a retina of a patient; obtains a current three-dimensional representation of the retina from the current pair of images; determines deformation of the retina by evaluating the current three-dimensional representation relative to a reference representation of the retina; determines stress on the retina according to the deformation; and outputs guidance according to the stress. Stress may be determined using FEM and may use velocity and acceleration of the deformation. Guidance may include a graphical representation of the stress or a vector along which force should be exerted. Deformation may be detected using a mesh projected onto the retina.

A tire pressure estimation device and a tire pressure estimation method are provided that can estimate tire air pressure with high accuracy. [Solution] Tire pressure estimation device 1 is a tire pressure estimation device that estimates the air pressure of a vehicle tire. Tire pressure estimation device 1 includes extraction means 9 that extracts rotation-synchronous components from a wheel speed signal while the vehicle is running, frequency analysis means 10 that performs a predetermined frequency analysis on the output from the wheel speed signal after the rotation-synchronous components have been removed, and air pressure value acquisition means 11 that inputs vibration components in a predetermined frequency band obtained by the frequency analysis to relationship setting means 12 to acquire an air pressure value. Extraction means 9 calculates the rotation-synchronous components by averaging the wheel speed signal divided for each tire rotation.

The stress estimation device acquires the awakening degree of the subject and calculates the feature amount of the acquired awakening degree. The feature amount of the awakening degree is, for example, a ratio at which the temporal change of the awakening degree is within a predetermined range, information defining a histogram showing the distribution of the temporal change of the awakening degree, and the like. Then, the stress estimation device estimates the stress from the calculated feature amount using the stress model.

The application discloses an integrated flue template construction process abnormality detection method based on visual identification, which comprises the following steps: performing multi-person posture estimation and action recognition on a plurality of video streams of a construction site to generate a construction action event sequence; constructing a multi-person action interaction graph and detecting a process conflict by using a space-time graph attention network; processing a double-mode video stream to generate a temperature field time sequence of each supporting rod; extracting a dynamic thermal feature vector; fusing the action event sequence and the dynamic thermal feature space-time to generate an action-thermal combined time sequence feature; inputting the combined time sequence feature into a causal time sequence graph neural network to output a stress estimation value, a stress prediction trajectory and a causal contribution score; performing overload early warning analysis; and generating an integrated construction process abnormality detection report by fusing all the results.

This invention discloses a flow field perception and stress analysis system for a temporary support frame structure of a flood discharge channel, relating to the field of flood discharge engineering technology. It constructs a support structure layout model; collects velocity vector field and pressure field data in real time at key node locations to form time-series flow field information; constructs a local disturbance distribution function based on the flow field data and extracts vortex structure and shear strength variation indices; inputs the disturbance characteristics into the node stress estimation model to calculate the instantaneous stress response; judges abrupt force changes and identifies instability trends, establishes a local reinforcement calculation domain, refines the flow field and node response, and iteratively predicts the instability moment; finally, it outputs a time-varying force spectrum and risk distribution map. This invention realizes dynamic analysis and early warning of support structures under flood discharge conditions, improves the accuracy and response efficiency of structural safety assessment, and has good engineering application value.

In a system that monitors abnormalities in temperature control devices, the pressure abnormalities of the temperature control devices can be easily monitored, and the abnormality is notified before it leads to an emergency shutdown. [Solution] The abnormality monitoring system 100 includes: a pressure estimation unit 21a that estimates the pressure of the refrigerant based on the output values ​​of sensors 10a and 10b installed on the suction side and / or discharge side of the refrigerant R in the compressor CM, which correspond to the temperature of the refrigerant R; a reference pressure setting unit 21b that sets a reference pressure Ps from among the history of the estimated pressure P during a predetermined period T1 while a reference operation is being performed in the temperature control device TM; and an abnormality notification instruction unit 21c that executes an instruction to notify of an abnormality based on a comparison between the estimated pressure P and the preset reference pressure Ps while an operation to be monitored is being performed in the temperature control device TM.