8 results about "Flow curve" patented technology

The invention provides a rheological test-based liquid food suction tube suction difficulty prediction method, which comprises the following steps of: measuring a characteristic flow curve of a liquid food sample through a steady-state flow test, respectively carrying out Carreau-Yasuda model or Casson model (if the liquid food sample is a yield fluid) fitting, calculating to obtain a suction tube predicted flow Qc, then carrying out Herschel-Bulkley model fitting to obtain a consistency index Kh, and calculating the suction tube suction difficulty of the liquid food sample through the consistency index Kh. The power law index is n, and the Herschel-Bulkley yield stress is tau h (if the fluid is yield type fluid). Tau R is calculated according to a pipe flow equation and substituted into a Herschel-Bulkley model, the shearing rate # imgabs0 # and the corresponding apparent viscosity # imgabs1 # are obtained, then the pipe suction difficulty of the liquid food suction pipe is predicted through a constructed prediction model # imgabs2 #, a traditional sensory evaluation method is replaced, and a new thought is provided for research, development and decision making of a food enterprise.

The invention discloses a test error-considered water flow rate calibration and comparison method, system, medium and equipment. The method comprises the following steps: acquiring actually-measured water flow data measured by a standard hydrological instrument in a river and actually-measured virtual water flow data measured by a hydrological instrument to be measured in the river; establishing a standard water level water flow curve between the river water level and the actually measured water flow data and a virtual water level water flow curve between the river water level and the actually measured virtual water flow data based on a curve relation fitting method; according to the standard water level water flow curve and the virtual water level water flow curve, whether the hydrological instrument to be detected meets the production and use requirements or not is judged. On the basis of the data processing flow, a standard water level-water flow curve and a virtual water level-water flow curve are constructed through curve relation fitting on the basis of measured data, and whether the hydrological instrument to be measured meets the production and use requirements or not is judged according to the consistency of the standard water level-water flow curve and the virtual water level-water flow curve.

The present application relates to the technical field of device life prediction, and more particularly to a device life prediction method and system based on working state change curve, the present application proposes the following scheme, by acquiring the working state change curve of the device in the working process, the resampling of the flow curve is realized based on the cumulative volume mapping, the hysteresis back scanning is carried out in the neighborhood of the candidate boundary point, the final boundary point is determined, and the updated equivalent window is constructed. Further, according to the volume difference between the plurality of updated equivalent windows, correction is carried out, when the difference is within the tolerance range, it is directly used, otherwise a correction factor is introduced to correct the updated window, and the self-cleaning recovery characteristics of the device during the cycle switching are combined to compensate, so that the updated equivalent window more in line with the actual situation is obtained. The attenuation and recovery process of the device is accurately characterized, and reliable basis is provided for device life prediction and operation and maintenance strategy.

The application provides a kind of liquid food straw sucking difficulty prediction method based on rheological test, the characteristic flow curve of liquid food sample is measured by steady flow test, respectively Carreau-Yasuda model or Casson model (if it is yield type fluid) fitting is carried out, and the predicted flow Q of straw is calculated c , then Herschel-Bulkley model fitting is carried out, and the consistency index K h , power law index n, Herschel-Bulkley yield stress τ h (if it is yield type fluid) is obtained.According to the equation of pipe flow flow, τ R Is calculated and substituted into Herschel-Bulkley model, and the apparent viscosity corresponding to shear rate is obtained, then the prediction model is constructed to predict the liquid food straw sucking difficulty, replace the traditional sensory evaluation method, and provide new ideas for food enterprise research and development decision.

The invention provides a material blockage early warning method based on material flow value difference degree calculation of a material inlet and a material outlet, which is based on material flow value matching degree calculation of the material inlet and the material outlet, and comprises the following steps of: firstly, calculating time offset of the material inlet and the material outlet and aligning a flow curve on a time axis; then, the trend difference degree of the flow curves of the feeding port and the discharging port is analyzed through a dynamic time warping algorithm, the numerical value difference degree characteristics are analyzed through the numerical value characteristics of the flow curves, and early warning of the material blocking fault is achieved; aiming at the problems of detection lagging, high false alarm rate, poor adaptability and the like in the prior art, the method comprises the following steps: calculating time offset of a feed / discharge port, aligning a flow curve on a time axis, analyzing trend difference degree of the flow curve of the feed / discharge port by a dynamic time warping algorithm, and analyzing numerical difference degree characteristics through numerical characteristics of the flow curve, so that the flow curve of the feed / discharge port can be accurately detected. And early warning of material blocking faults can be realized.

The invention provides a rapid flow testing method and system for a large-flow river channel. The method comprises the steps that the sectional area of the large-flow river channel at all water levels is measured through a total station; measuring the average flow velocity of the large-flow river channel at each water level by using an acoustic Doppler flow velocity profiler; determining a water level-flow curve of the high-flow river channel according to the sectional area of the high-flow river channel at each water level and the average flow velocity at each water level; and acquiring the water level at a to-be-tested moment, searching the flow corresponding to the water level at the to-be-tested moment in the water level-flow curve, and taking the flow as the flow at the to-be-tested moment. According to the technical scheme, the accuracy is high, the flow calculation process is simplified, and the response speed of flow measurement is increased.

The invention relates to the technical field of device service life prediction, in particular to a device service life prediction method and system based on a working state change curve, and provides the following scheme that the working state change curve of a device in the working process is obtained, resampling of a flow curve is achieved based on accumulative volume mapping, and the service life of the device is predicted. Hysteretic flyback recheck is carried out in the neighborhood of the candidate demarcation points to determine a final demarcation point and construct and update an equivalent window. Further, correction is carried out according to the volume difference among a plurality of updating equivalent windows, when the difference value is within a tolerance range, the difference value is directly adopted, otherwise, a correction factor is introduced to correct the updating window, and compensation is carried out in combination with the self-cleaning recovery characteristic of the device during periodic switching, so that the updating equivalent window which is more practical is obtained. Accurate characterization of the attenuation and recovery process of the device is realized, and a reliable basis is provided for service life prediction and operation and maintenance strategies of the device.