4results about How to "High precision output" patented technology

The invention discloses an oil flash point online prediction method based on multiple physical quantities and temperature and use duration correction, and belongs to the field of oil performance monitoring and equipment health management. The online prediction method comprises the following steps: collecting multi-physical-quantity sensing signals of oil in the operation process of target equipment, and executing timestamp synchronization, interpolation alignment, abnormal value elimination and sample matrix construction; performing benchmark processing on the temperature sensitive variable by using the temperature correction model; the oil temperature is monitored in real time, the accumulated high-temperature operation duration when the temperature exceeds a threshold value is calculated, time correction is conducted on a flash point according to an empirical formula and an exponential decay model, and the flash point decline effect caused by aging is compensated; taking the multi-physical quantity vector after temperature and oil age correction as input, constructing a multi-model fusion prediction framework, and generating a flash point prediction value through a weighted fusion or stacking strategy; and comparing the predicted flash point with a baseline value, executing hierarchical early warning, generating a structured evidence chain log, and recording input parameters, a model version, a prediction result and threshold setting.

The utility model discloses a resistor switch matrix which comprises a plurality of resistor groups which are sequentially connected in series, each resistor group comprises a first resistor, a second resistor, a third resistor and a fourth resistor which are sequentially connected in series, and a control switch is connected between every two resistors in parallel. The resistance switch matrix further comprises a control system used for controlling the control switches to be turned on and turned off, and the control system is used for controlling the control switches to be turned on and turned off so as to output different resistance values. According to the utility model, through a programmable resistance switch matrix, different resistance value output effects can be freely and flexibly realized, NTC and PTC can be simulated to show different temperatures, and different insulation resistance values can be simulated.

The application belongs to the technical field of integrated circuits, and discloses a temperature-approximate-independent current reference circuit, which comprises a starting module, a reference current generating module and an output current generating module. The input end of the reference current generating module is connected with the starting module, and a feedback signal is applied to the starting circuit module. The input end of the output current generating module is connected with the output end of the reference current generating module. On the basis of the reference current output, the reference current can be amplified or reduced by one or several groups of current mirrors, so as to obtain one or several groups of temperature-approximate-independent output currents. The application can work in a wide voltage range and output a temperature-approximate-independent current.

A tool management and control method and system of a numerical control machine tool relate to the technical field of numerical control machine tools. The method comprises the following steps: S1, collecting tool signals and preprocessing; S2, constructing a heterogeneous graph, and calculating the feature correlation between nodes by using a graph attention aggregation mechanism; S3, performing dilated convolution and gated residual operation on the embedded tensor on a GPU; S4, constructing a tool wear evaluation network, and performing channel and time sequence weighting on the space-time feature matrix; S5, according to the wear confidence, an improved hierarchical matching algorithm is used to match the embedded tensor and the processing task demand vector; S6, inputting the optimal tool sequence into the numerical control machine tool terminal, and completing parallel scheduling and tool position mapping; S7, after processing is completed, updating the tool whole life cycle database according to the health score, and generating a data report containing replacement suggestions and maintenance plans. The present application realizes accurate identification and intelligent scheduling of tool wear state, and significantly improves tool utilization and numerical control machine tool operation efficiency.