4results about How to "Meet practical requirements" patented technology

This invention belongs to the field of shield tail seal monitoring technology for tunnel boring machines (TBMs), and discloses a real-time monitoring and targeted repair system for the shield tail seal cavity. The system includes: several ultrasonic sensors for monitoring the location of grease loss within the grease cavity; a grease pump that delivers grease into two grease cavities via a first pipeline and a second pipeline, with the output ends of the first and second pipelines providing targeted grease replenishment at the locations of grease loss detected by the ultrasonic sensors; water pressure sensors installed on the shield tail brush plates on both sides of the grease cavity; grout and water pressure sensors installed at the grouting pipe inlets on the TBM; and grease pipe pressure sensors installed at the inlets of both the first and second pipelines; a pressure feedback system that controls the amount of grease injected into the grease cavity via the measured pressure. This invention enables real-time monitoring and targeted repair of grease within the grease cavity.

This invention discloses an active omnidirectional magnetic antenna differential receiver and its design method for long-wave positioning, navigation, and timing. The device includes a long magnetic core and two short magnetic cores, with the two short cores located on either side of the long core. The three cores are arranged in a cross shape. A set of receiving coils is wound around each end of the long core, and a set of receiving coils is wound around each of the two short cores. The leads of all four sets of receiving coils are connected to the common ground of the circuit board. Furthermore, the four sets of receiving coils are electrically connected to an amplifier circuit. The receiver disclosed in this invention achieves omnidirectionality and miniaturization of the magnetic antenna, improving anti-interference capability. It also has strong generalization ability, utilizing the tuning function of the amplifier circuit to be applicable to the reception and amplification of long-wave signals of different frequencies.

The present application relates to a multi-dimensional value evaluation method and system for scientific and technological information viewpoints based on fuzzy cumulative prospect theory, the method comprising the following steps: S1: constructing a scientific and technological information viewpoint value evaluation index system and calculating the accurate scores of several dimensions; S2: triangular fuzzy processing the accurate scores of several dimensions and calculating the comprehensive prospect value based on cumulative prospect theory; S3: linear normalization of the comprehensive prospect value of several dimensions to obtain the standardized score; S4: generating the star rating of the scientific and technological information and the corresponding decision suggestion. The system comprises an index calculation module, a fuzzy processing and prospect value calculation module, a linear normalization module and a grade evaluation module. The present application can realize comprehensive, objective and intelligent evaluation of the value of scientific and technological information viewpoints, and provides a scientific, intelligent, practical and interpretable value evaluation solution for the field of scientific and technological information analysis and decision support.

The invention relates to an active infrared vision fusion VR positioning method in an under-illumination environment, and the method comprises the steps: configuring an active infrared illumination unit on a head-mounted device, controlling the active infrared illumination unit to emit infrared light to the environment in a preset illumination mode, and collecting an infrared image; synchronously acquiring measurement data of the inertial measurement unit; performing preprocessing and feature extraction and tracking on the infrared image to obtain visual features; carrying out pre-integration on the measurement data to obtain IMU pre-integration data; visual features and IMU pre-integration data are fused, and state estimation and map construction are carried out through a multi-sensor tight coupling optimization algorithm; outputting a six-degree-of-freedom pose; and based on a state estimation result or visual feature extraction quality, dynamically adjusting illumination parameters, and repeating the steps. The fundamental problem that a traditional visual scheme fails in the dark is thoroughly solved, stable and continuous six-degree-of-freedom pose output is achieved, meanwhile, the optimal balance of power consumption and performance is achieved, mutual interference among multiple devices is effectively restrained, and the precision and robustness of the system are greatly improved.