33results about How to "Proportional control" patented technology

Skateboard speed control is achieved by improved application of a mechanism to provide even force to the wheels by a simplified speed control system. The speed control system is durable, compact, simple, uses minimal components, is ergonomic, and has speed control pads that move in sync while simultaneously tolerating variations in wheel orientation and position while a rider is maneuvering the skateboard.

The invention relates to a method for analyzing short-term temperature fluctuations, which collects daily temperature series of a certain place for many years, takes data within the length of the research period to calculate the difference between the daily temperature and the temperature of the first day within the length of time, and forms a difference group , and form multiple difference series based on the corresponding difference group data for many years, sort each difference series by size, and calculate the upper and lower thresholds; determine the relationship between the daily corresponding difference group and the upper and lower thresholds of the corresponding difference series, It can be judged whether the temperature fluctuation occurs within the length of the study period. The method of the present invention can freely define the length of the research period and the threshold ratio of the occurrence of fluctuations, and eliminates the influence of seasonal changes on temperature fluctuations, and can obtain the daily temperature fluctuation range and the fluctuation frequency within a time period, and the direction of fluctuations can be determined by the fluctuation range Positive or negative indication of the indicator.

Boiled of liquefied natural gas flows from, say, storage tank 10 and is compressed in vapour compression stages 40 and 42. The resulting compressed vapour is condensed in a condenser 46 and the condensate returned to the tank 10. The condenser 46 is cooled by means of a working fluid, for example nitrogen, flowing in a Brayton cycle 60. The Brayton cycle includes a heat exchanger 86 which removesheat of compression from the compressed natural gas vapour upstream of its passage through the condenser 46. In addition a part of the working fluid is withdrawn from a region of the Brayton cycle 60intermediate the working fluid outlet from the condenser 46 and the working fluid inlet to the heat exchanger 86 and the withdrawn working fluid flows through another heat exchanger 88 in which it removes heat of compression from the natural gas vapour intermediate the compression stage 40 and the compression stage 42. The withdrawn working fluid is returned to the Brayton cycle 60.

The invention discloses an intelligent batching device for animal husbandry, which comprises a box body and a column. The four corners of the bottom of the box body are equipped with upright columns, the inner cavity of the bottom of the box body is equipped with a trough, and the outer wall of the roller is equipped with multiple A top block, the outer wall of the bottom of the top block is equipped with a collar, the left and right sides of the bottom of the collar are equipped with nuts, the nuts are connected with the inner wall of the roller, and the left and right sides of the top of the collar are installed There are bolts which in turn pass through the collar and the nut. Driven by the motor, this animal husbandry batching device achieves the purpose of making the rollers start to rotate, so that the top block can lift up the supporting plate in a circular manner, so that the proportion of the feed is more accurate. By turning the bolts, the bolts are withdrawn from the nuts, that is, The top block can be removed from the roller, in this way the frequency at which the second channel steel is lifted up in each cycle is changed, thereby changing the outflow of raw materials and achieving the purpose of controlling the feed ratio.