3results about How to "Intelligent speed control" patented technology

The application relates to the technical field of planting, and discloses a root protection and chromium enrichment strengthening device and method for plant planting in chromium-polluted soil, which comprises a planting fixing device, a root isolation device and a chromium enrichment device. The three functions of physical planting fixation, root isolation protection and repair strengthening of plants are integrated in one body, the survival rate of chromium enrichment plant planting is improved, and with the help of a coarse filtration layer, an adsorption conversion layer and a slow-release layer with selective barrier function, a protective barrier can be established between the plant roots and the chromium-polluted soil, so that the initial chromium exposure concentration of the roots is reduced, the survival rate of seedlings and the early growth speed are significantly improved, and a lower expansion ring is arranged on the planting fixing device, the angle of the lower expansion ring on the universal ball can be adjusted through the angle rotation of the clamping seat, and the planting fixation of plants with different root sizes can be realized.

The utility model relates to sewing machine technical field especially discloses a kind of in and out turning equal-distance stitch sewing machine, including rack, sewing machine head being set on rack, pose data acquisition module and control center;Rack is also provided with the moving seat for moving the sewing piece to be waited, sewing machine head, pose data acquisition module, moving seat are electrically connected with control center, pose data acquisition module is set on moving seat, moving seat is used to move the sewing piece to be waited, sewing machine head carries out sewing operation to the sewing piece to be waited placed on moving seat;Pose data acquisition module is used to obtain the position data, pose data or / and speed data in the movement process of the sewing piece to be waited on moving seat, and data transmission is returned to control center and is handled by algorithm, control center controls the sewing speed of sewing machine head according to the data after processing, realizes the stitch consistency of in and out turning and straight line movement.

This application discloses a method, device, and system for adjusting airflow in multi-story buildings. The method includes: acquiring current operating data of a target range hood; sending the current operating data and floor information of the target range hood to a cloud server, so that the cloud server determines the target operating data of the target range hood based on the current operating data and floor information; receiving the target operating data sent by the cloud server; adjusting the current rotation speed of the electric air supply valve based on the target rotation speed of the electric air supply valve, and acquiring an updated second pressure value; if the updated second pressure value is within a preset range, determining the actual airflow of the target range hood based on the first pressure value; and adjusting the current rotation speed based on the target rotation speed of the fan until the actual airflow is within a preset airflow range. The method of this application can efficiently and dynamically adjust the airflow to achieve constant pressure and constant airflow operation of the range hood.