9results about How to "Eliminate signal interference" patented technology

The invention discloses an acoustic online monitoring device and method for laser lithotripsy, and the device comprises a laser device which is used for generating high-energy pulse laser; the laser controller is used for controlling parameters of the laser; the optical fiber controller is used for controlling the position adjustment of the laser output by the optical fiber when the laser does not hit the stone and the video signal shows that the stone exists; the monitor is used for displaying video signals in the laser lithotripsy process; and the sound wave signal processor is used for obtaining sound wave signals collected in the laser lithotripsy process and judging whether the laser hits the stone or not according to the sound wave signals. Real-time acoustic feedback is provided for the laser lithotripsy process, and the accuracy and safety of the laser lithotripsy operation are ensured.

The invention discloses a driving circuit and a display module. The driving circuit comprises a clock signal input end, a grid signal output end and a standby transmission unit, the clock signal input end is connected with the grid signal output end; the grid signal output end is used for being connected with a pixel; one end of the standby transmission unit is connected with the clock signal input end, and the other end is connected with the pixel; the clock signal input end is used for receiving a clock signal and controlling the grid signal output end to transmit a grid signal to the pixel according to a preset time sequence through the clock signal so as to drive the pixel to work; and the standby transmission unit is used for communicating the clock signal input end with the pixels when the output of the gate signal output end is abnormal so as to drive the pixels to work. According to the technical scheme, a maintainer can cut off signal connection among the clock signal input end, the grid signal output end and the pixels to relieve suppression on signal output of the standby transmission unit, so that the standby transmission unit can replace the grid signal output end to drive the pixels to work.

The invention discloses a negative ion concentration measurement and control system for tunnel fire conditions, which relates to the technical field of environmental monitoring and control, and comprises a negative ion sensor module for real-time monitoring of the negative ion concentration at each point in the tunnel, a particle concentration monitoring module for monitoring the particle concentration in the tunnel, a data processing module for correcting the negative ion concentration data and eliminating signal interference based on the negative ion concentration data and the particle concentration data, a negative ion generator module for starting or adjusting the working state according to the corrected negative ion concentration data to keep the negative ion concentration in the tunnel within a predetermined range, and a central control module for monitoring the working state of each module, recording the working data, and sending an alarm signal when an abnormal situation occurs; the negative ion concentration measurement and control system for tunnel fire conditions solves the problem of interference in measurement signals caused by the combination of negative ions and particles in the prior art when smoke is diffused in the tunnel fire.

The application discloses an ultrasonic film detection method, an ultrasonic fingerprint device and electronic equipment. The method comprises the following steps: obtaining N original echo time domain data with the same sampling duration, each original echo time domain data comprising a plurality of original amplitudes, and the sampling intervals of any two adjacent original amplitudes being the same; performing fusion processing on the N original echo time domain data to determine target echo time domain data, wherein the target echo time domain data comprises a plurality of target amplitudes, and each target amplitude is determined based on N original amplitudes with the same time sequence; performing feature extraction on the target echo time domain data to determine measured features corresponding to one or more film detection indexes; and determining a film detection result based on the measured features corresponding to the one or more film detection indexes. The ultrasonic film detection method can effectively eliminate hardware jitter, increase the signal strength of the echo time domain signal, and further improve the accuracy of film detection.

This utility model provides an engine speed signal isolation and branching module, belonging to the field of engine testing technology. This module solves the problems of signal interference and signal degradation when testing engine speed, phase, and other signals. The module's signal input unit connects the sensor signal terminal to the input terminal of the signal isolation unit. The output terminal of the signal isolation unit connects to the input terminals of the signal inverting unit and the signal output unit. The output terminal of the signal inverting unit connects to the input terminal of the signal output unit, and the output terminal of the signal output unit connects to the input terminal of the testing equipment. The isolation power supply unit converts the sensor power supply into an isolated power supply output. This module has the function of isolating and branching the speed sensor output signal, eliminating signal interference, preventing signal degradation, and simultaneously outputting in-phase and in-phase signals. The module uses a multiplexing method internally for high reliability, and adopts a non-destructive connection method to avoid damaging the wiring harness, thus improving work efficiency.

The invention discloses a special power supply signal processing module for an automobile test, which comprises a power supply box body, a core PCB (Printed Circuit Board) card arranged in the power supply box body and used for supporting power supply and signal output of multiple paths of sensors, and a voltage stabilizing module arranged in the power supply box body and used for stably outputting input 10-16V direct-current voltage as 12V direct-current voltage, the power supply box body is provided with a 4-core aviation head interface used for accessing a sensor for power supply and signal output, a cigarette lighter female head and a banana head interface used for outputting power supply, and a 25-pin joint and a BNC joint used for signal output switching. The special power supply signal processing module for the automobile test solves the problems of limited external power supply channel / power, complex wiring of related sensors and signal interference of the existing automobile test equipment.

The utility model relates to the technical field of electric connector manufacturing, in particular to a radio frequency coaxial connector assembly which is formed by combining a male connector and a female connector. N guide raised lines and an annular limiting sinking groove are formed on the outer side wall of the insertion section of the male head outer conductor. N guide notches are formed in the outer side wall of the insertion section of the female head outer conductor. An anti-drop raised line is formed on the inner side wall of the insertion section of the female head outer conductor, and the anti-drop raised line is cut off by the guide notches to form N anti-drop clamping fingers. Therefore, on one hand, in the process of executing the insertion operation, each guide raised line can quickly slide into the corresponding guide notch, so that the accurate positioning is realized and the insertion difficulty is reduced; on the other hand, after the execution of the insertion operation is completed, the anti-drop clamping finger is right located in the annular limiting sinking groove, so that the phenomenon that the radio frequency coaxial connector is loosened due to the action of dragging force or exciting force can be avoided; and on the other hand, the degree of freedom of circumferential rotation of the male connector is limited, and positive electric conduction of the male contact and the female contact is easy to realize.

The compact optical fiber inertial measurement device comprises a system body, a box body, an upper cover, a first 50 single-axis optical fiber gyroscope, a second 50 single-axis optical fiber gyroscope, a third 50 single-axis optical fiber gyroscope, an addition meter assembly, a signal processing and interface circuit, a secondary power supply circuit and an electric connector assembly, wherein the system body is arranged in the box body; the upper cover is connected with the open end of the box body; the first 50 single-axis fiber-optic gyroscope, the second 50 single-axis fiber-optic gyroscope, the third 50 single-axis fiber-optic gyroscope, the additional meter assembly, the signal processing and interface circuit, the secondary power supply circuit and the electric connector assembly are all arranged on the system body. According to the invention, the core structure size of the optical fiber inertial measurement device is more compact, the size and weight of the optical fiber inertial measurement device are greatly reduced, and the integration level and assembly manufacturability of the system are improved.

The invention relates to a power quality disturbance signal positioning method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring an electric energy quality signal corresponding to electric energy sensing equipment; performing signal reconstruction processing on the electric energy quality signal to obtain a reconstructed electric energy quality signal; and extracting a plurality of amplitude fluctuation characteristics corresponding to the reconstructed electric energy quality signal, and performing clustering processing on each amplitude fluctuation characteristic to determine a spatial position of an electric energy quality disturbance signal, the electric energy quality disturbance signal being a signal having amplitude fluctuation in the electric energy quality signals. By adopting the method, the electric energy quality disturbance signal can be accurately positioned.