7 results about "Pulse pressure wave" patented technology

The invention provides a high-pressure durability test method for a hydraulic fluid module. The high-pressure durability test method comprises the following steps: acquiring target test pressure and target pulse frequency of the hydraulic fluid module; calculating a minimum fluid volume required by a test element based on this; a metal cylinder and an optional metal ball are filled in an inner cavity of the test element, and the actual effective fluid volume of the test element is adjusted to meet the minimum volume requirement; connecting a test system, injecting and heating a test medium, and then applying a pulse pressure waveform conforming to a target parameter to carry out a durability test; and finally, judging the durability of the test element by monitoring whether the test element leaks or not. By actively and accurately adjusting the effective fluid volume of the test element, effective formation and stable transmission of the high-pressure pulse waveform are ensured, and the reliability and accuracy of the fatigue life test of the hydraulic element under the high-pressure working condition are remarkably improved.

The invention relates to the technical field of medical health, in particular to a heart failure risk assessment system and method based on electronic pulse diagnosis and artificial intelligence, and the assessment method comprises the steps: constructing a supervised learning model, and obtaining a heart failure risk prediction model through the training of traditional Chinese medicine experience data and traditional Chinese medicine theoretical data; the electronic pulse feeling instrument collects initial pulse pressure waves of a person to be diagnosed, and the initial pulse pressure waves are subjected to period segmentation to obtain single-period pulse wave slices; performing multi-dimensional pulse waveform feature extraction on the single-cycle pulse wave slices after cycle alignment, integrating the obtained multi-dimensional pulse waveform features into high-dimensional feature vectors, inputting the high-dimensional feature vectors into a heart failure risk prediction model, outputting a predicted heart failure prediction level, and generating a personalized report and a personalized conditioning scheme; the evaluation system is applied to the evaluation method, performs feature extraction on pulse waveforms in combination with an electronic pulse feeling instrument, and inputs a heart failure risk prediction model to enhance patient compliance and an intervention effect.

The application discloses a filtering method for filtering mud pump pressure ripple, and belongs to the technical field of oil and gas drilling, and comprises the following steps: a, a bypass pipeline is additionally arranged beside a drilling fluid riser, and a buffer is arranged on the bypass pipeline; b, a pressure sensor is arranged at the outlet of a mud pump to collect pressure signals, and a control signal opposite to the crest and trough of a mud pump pulse pressure wave is generated after computer processing, and the control signal is used for controlling the buffer to balance the pulse pressure wave; c, a valve mechanism is connected to the bypass pipeline, and a controller is connected to the valve mechanism; d, when a downlink instruction is transmitted, the valve mechanism is controlled to be turned on by a rotary guide downlink instruction transmission control system, and the buffer is used for balancing the excited pressure wave when the valve mechanism is in action. The bypass pipeline is turned on when the downlink instruction needs to be transmitted, and the excited pressure wave can be balanced by the buffer, so that the downlink instruction transmission precision is effectively improved.

The invention discloses a municipal pipeline internal blockage three-dimensional positioning and quantitative evaluation method based on cooperation of pulse pressure waves and ultrasonic guided waves. Comprising the following steps: S1, acquiring basic parameters of a target pipeline and initializing a propagation model; s2, performing pressure wave excitation and multi-point signal acquisition; s3, establishing an in-pipe pressure wave propagation model and introducing blockage equivalent impedance; s4, performing pulse pressure wave-based blockage axial position inversion and blockage degree preliminary quantification; s5, performing ultrasonic guided wave excitation and annular signal acquisition; s6, enabling the blockages attached to the inner wall of the pipe to be equivalent to a local contact stiffness-additional mass-damping system, constructing a circumferential abnormal index, and calculating the circumferential position angle of the blockage, so as to achieve the circumferential accurate positioning of the blockage based on the torsional wave characteristics without reflecting echoes; s7, fusing the pressure wave information and the guided wave information, and performing blockage position three-dimensional schematic reconstruction; and S8, carrying out joint inversion and correction on the blockage degree.

The present application relates to the technical field of excavation and filling, and discloses a fat groove backfill construction method for building backfill engineering, which comprises the following steps: obtaining the geometric characteristics of a space to be backfilled and initial rheological parameters of a filling medium; injecting the filling medium and collecting rheological data of a phase change process thereof; establishing a double-buffering space-time index structure based on a phase change gradient; using asynchronous scheduling of an active index buffer and a background overwriting buffer to match a pre-stored template to generate a synchronous pressure control instruction; and applying a low-frequency pulse pressure wave according to the pressure control instruction. The present application eliminates database read-write lock conflicts through asynchronous data processing, keeps the pressure regulation and the transient evolution law of the rheological properties of the filling medium in synchronization, destroys the internal arching structure and induces in-situ reorganization of the material by using a shear strain field, and improves the compactness of the backfill body and the interface sealing efficiency.

The invention relates to the technical field of excavation and filling, and discloses a fat groove backfilling construction method for building backfilling engineering, which comprises the following steps: acquiring geometrical characteristics of a to-be-backfilled space and initial rheological parameters of a filling medium; filling media are injected, and rheological data of the phase change process are collected; establishing a double-buffer spatial-temporal index structure based on a phase change gradient, and utilizing asynchronous scheduling of an active index buffer area and a background overwriting buffer area to match a pre-stored template so as to generate a synchronous pressure control instruction; according to the method, database read-write lock conflicts are eliminated through asynchronous data processing, pressure regulation and control and the transient evolution rule of the rheological property of the filling medium are kept synchronous, an internal arching structure is destroyed through a shear strain field, and in-situ recombination of materials is induced; and the compactness and the interface plugging efficiency of the backfill body are improved.

This non-invasive blood drug concentration monitoring system based on MIP-SERS coupled detection belongs to the field of medical monitoring. It includes: a shock wave generation and coupling module for generating and transmitting pulsed pressure waves; a patch-type microfluidic collection and volume control module for receiving the pulsed pressure waves transmitted by the shock wave generation and coupling module and applying them to the surface of isolated skin; a MIP-SERS coupled detection module for selectively capturing and enriching target drugs in extravasated fluids and performing high-sensitivity spectral fingerprint identification and quantitative reading of the enriched target drugs; a skin condition and contact quality monitoring module for acquiring online status parameters; and a control and signal processing module for controlling each module. This invention improves detection sensitivity and achieves quantitative, interference-resistant, and continuous-use capabilities for non-invasive monitoring through the combined detection of MIP and SERS.