6results about How to "Achieve noise" patented technology

The invention relates to an indoor intelligent environment control system in the technical field of intelligent supervision. The indoor intelligent environment control system comprises a main logic control circuit and an output control end circuit. According to the invention, interconnection and intercommunication of information data of a supervision place and electric equipment are realized in a mode of combining RS485 communication, wireless radio frequency communication, Bluetooth communication and wired Ethernet communication. Real-time networking of all prison rooms and a master control room is achieved through combination of wired Ethernet communication and RS485 communication, environment parameters in all prison rooms are collected in a centralized mode, devices in all prison rooms are accurately controlled, real-time networking, collection and sending of the environment parameters in the prison rooms are achieved through combination of RS485 communication, wireless radio frequency communication and Bluetooth communication in the prison rooms, and real-time monitoring of the prison rooms is achieved. And data support is provided for control equipment. Physical networking of electric equipment in a prison room is achieved, the power supply system is controlled to be turned on and turned off through the low-voltage circuit, and therefore operation of the electric equipment is controlled. And the voltage regulating module is controlled to work through pulse output of the control port, so that the electric equipment is controlled to operate.

This invention discloses a method and system for detecting surface defects in stainless steel pipes, comprising: S1, acquiring line scan images of stainless steel pipes under dark and bright illumination; S2, stitching the line scan images into dark and bright cylindrical unfolded images, and performing brightness equalization and reflection suppression processing; S3, performing pixel-level fusion of the dark and bright cylindrical unfolded images according to set weights; S4, inputting the fused cylindrical unfolded image into the backbone of a YOLO network integrating a Swing Transformer module to extract multi-scale feature maps; S5, performing feature fusion and bounding box prediction, and outputting the bounding box, confidence score, and category label of the defect; S6, performing semantic segmentation and grayscale segmentation in the detection box region and weighted fusion to generate a final defect mask; S7, calculating the area, length, width, and centroid coordinates of the defect, and converting them into actual dimensions and spatial positions. This invention improves the accuracy and stability of stainless steel pipe surface defect identification.

The invention provides a front low-noise light amplification method and system for a coherent detection laser radar, and the system comprises a continuous laser receiving and transmitting module which is used for transmitting detection light and receiving an echo signal, and the echo signal serves as first signal light; the double-pump generation module is used for generating second signal light and idler frequency light having a relative phase relation with the second signal light, and the second signal light and the idler frequency light serve as first pump light and second pump light respectively; the phase sensitive light amplification module is used for performing phase sensitive light parametric amplification after the first signal light is combined with the first pump light and the second pump light; the phase locking module is used for locking the relative phase between the double-pump light and the first signal light in the phase sensitive light amplification module; and the coherent detection module is used for detecting the first signal light amplified by the phase-sensitive optical parameter and demodulating information in the target. Weak optical signals can be amplified in a high-gain mode, amplification of same-frequency background noise can be restrained, and the signal-to-noise ratio and coherent detection efficiency of echo signals can be improved.

This application relates to the field of environmental monitoring technology, specifically providing a method, apparatus, storage medium, and electronic device for monitoring the construction environment. The method may include: during the construction of a tunnel boring machine (TBM) in a target area, collecting the original vibration signal generated by the TBM and the TBM's construction parameters; wherein the construction parameters include thrust and torque; inverting the pre-processed vibration signal from the original vibration signal to obtain a three-dimensional underground velocity model; obtaining the wave velocity change rate based on the underground three-dimensional velocity model, and obtaining index values ​​of rock mass anomalies based on the processed vibration signal; analyzing the construction parameters, the wave velocity change rate, and the index values ​​to obtain monitoring results for the target area; wherein the monitoring results include a risk level and response measures to address the risk level. The embodiments of this application can achieve dynamic monitoring of the construction environment and provide real-time risk warnings.

The utility model relates to the field of Roots vacuum pumps, in particular to a low-noise Roots vacuum pump. The technical problem to be solved by the utility model is to provide the low-noise roots vacuum pump which can carry out multi-stage noise reduction treatment on airflow noise generated in an exhaust process and realize sound energy absorption, vibration isolation and thermal noise control. A low-noise roots vacuum pump comprises a pump body. Two rotors which synchronously rotate in opposite directions are transversely arranged in the pump body; an air inlet is formed in the top of the pump body, an air outlet is formed in the bottom of the pump body, and a hush pipe used for eliminating exhaust noise is fixedly connected to the air outlet in the bottom of the pump body; the silencing pipe comprises a main pipe body; the two ends of the main pipe body are sleeved with connecting discs respectively. According to the utility model, airflow noise generated in the exhaust process is subjected to multi-stage noise reduction treatment, and the effects of sound energy absorption, vibration isolation and thermal noise control are realized.

This invention relates to the field of intelligent control technology, and discloses a sleep control method, device, air purifying equipment, and storage medium. Applied to an air purifying equipment, the equipment includes multiple air outlets disposed around the perimeter of the casing and an air outlet disposed on the top of the unit. Each air outlet is equipped with an independently openable and closable baffle assembly for controlling the opening and closing of the corresponding air outlet. The method includes: acquiring sleep-related parameters of the user, including at least: preset sleep period information, user status data, and ambient light intensity; determining the user's current target sleep stage based on the preset sleep period information, user status data, and ambient light intensity; matching and executing a control strategy corresponding to the target sleep stage. The control strategy controls the fan of the air purifying equipment and selectively controls the opening and closing states of air outlets at different locations according to different sleep stages, providing a more comfortable sleep environment for the user.