4results about How to "Short lag time" patented technology

This invention proposes a hysteresis compensation control method for high-speed switching valves based on PWM, belonging to the field of high-speed switching valve control. Its key feature is that the working cycle of the high-speed switching valve is divided into four stages. The rising and falling edges of the reference PWM control the opening and closing times of the high-speed switching valve, while the loading signal consists of on-compensation PWM, excitation PWM, opening-hold PWM, and closing compensation PWM. By varying the pressure before the valve, the critical voltage values ​​for opening and closing the valve core are obtained, thereby controlling the amplitudes of the on-compensation PWM and opening-hold PWM to reduce the hysteresis time and current consumption of the valve core response. The duty cycle of the excitation PWM is determined by the derivative of the pressure before the valve, and the duty cycles of the on-compensation PWM and closing compensation PWM are obtained based on the coil current, accelerating the valve core response speed and optimizing current consumption. This invention can improve the response speed of high-speed switching valves, reduce energy consumption, and expand the frequency response range, offering advantages such as high response, low power consumption, low cost, and small footprint.

The application relates to the technical field of temperature control, and particularly discloses a medicament reaction monitoring method and system based on constant-temperature control, which comprises the following steps: generating a temperature change rate distribution gradient field in the interior of a reaction container and predicting a thermal diffusion trend vector diagram of a next control period according to a detection point data set with space-time characteristics; determining a feedforward decoupling control component based on local extreme points in the thermal diffusion trend vector diagram and real-time temperature values, and taking a difference between a global average temperature and a set target temperature as a main deviation; integrating and adaptively coupling the main deviation to generate a feedback adjustment reference quantity according to a temperature field uniformity index, and preventing overshoot fusion of the feedforward decoupling control component and the feedback adjustment reference quantity to generate a comprehensive driving instruction; and the application effectively solves the problems of temperature response lag, overshoot oscillation and poor adaptability to temperature field distribution changes, and improves the temperature control precision and stability of a medicament reaction process.

This invention provides a method and system for attendance management based on multi-dimensional data verification, relating to the field of attendance data processing technology. The method includes: acquiring multi-source data of employees within the attendance period; cleaning and parsing the data to generate a set of attendance events to be verified, each with a timestamp and source identifier; determining the basic attendance type based on attendance rules and scheduling information; calling a multi-dimensional verification model to perform weighted fusion analysis on mobile terminal positioning, access control direction, network connection characteristics, and frequency of operational behaviors at the same timestamp, calculating an on-duty confidence score, and marking any score below a threshold as a questionable attendance event; triggering the verification process by pushing a verification request to the employee's terminal, receiving feedback data including real-time positioning and on-site images, correcting questionable events, and generating a calibrated attendance record. This invention solves the problems of existing attendance management data having a single dimension, difficulty in accurately verifying on-duty status, and a lack of real-time and accurate verification.

This utility model discloses a cold and heat storage pipeline management device for energy stations, relating to the field of pipeline management technology. It includes a cold and heat storage pipeline body with an installation hole on its upper surface. A first installation pipe is fixedly connected inside the installation hole. A sealing frame is formed on the upper surface of the first installation pipe, and a second installation pipe is fixedly connected to the upper surface of the sealing frame. A sealing mechanism is provided inside the sealing frame, and fixing blocks are provided inside both the first and second installation pipes. This utility model uses wireless temperature and pressure sensor heads to directly contact the medium inside the pipeline, enabling real-time collection of temperature and pressure data. This data is then wirelessly transmitted to a management terminal. When a sudden temperature change or abnormal pressure drop occurs, the system can immediately issue an early warning, significantly reducing the time lag in leak detection compared to traditional manual inspections, thus reducing energy waste and safety hazards.