4results about How to "Improved Temperature Compensation Accuracy" patented technology

The invention provides a method for improving the temperature compensation precision of a pressure sensor, and the method comprises the steps: obtaining the output-pressure-temperature data of a pressure sensor sample through an experiment by employing calibrated high-precision equipment, carrying out the polynomial fitting based on a least square method, calculating the coefficient of a multi-term expression, optimizing the polynomial times of the multi-term expression, and obtaining the temperature compensation precision of the pressure sensor. And the polynomial piecewise function is combined to obtain the highest fitting precision, the function piecewise of the polynomial piecewise function is optimized, and the optimized polynomials are combined into the polynomial piecewise function to serve as a temperature compensation function for improving the temperature compensation precision of the pressure sensor. According to the method provided by the invention, the temperature compensation precision can be further improved, the fitting precision can be effectively improved, the fitting mean square error can be improved from 4.993 e-05 to 1.013 e-05, and the precision is improved by about 80%.

According to the temperature compensation method and system of the pressure sensor, the temperature compensation precision of the sensor can be improved by combining a hardware and neural network composite method, and the measurement accuracy is improved; and the neural network can process a complex non-linear relationship, so that the temperature compensation characteristic of the sensor can be modeled more accurately. In addition, the neural network is deployed on the FPGA, and due to the parallel computing advantage of the FPGA, the execution speed of the algorithm can be increased; a feedback mechanism is adopted to take sensor output as new training data for adjusting parameters of the neural network model, and the performance of the neural network model can be further optimized to adapt to a new working environment of the sensor.

A lead-free packaged all-quartz resonant pressure sensor comprises a 3J21 alloy shell cover, the 3J21 alloy shell cover is connected with a 3J21 alloy shell in a sealed mode, and a quartz island film pressure conversion unit, a quartz resonant layer element and a quartz base component which are connected through a vacuum glass frit sealing technology are arranged in an inner cavity formed by the 3J21 alloy shell cover and the 3J21 alloy shell. Glass frit dielectric layers are arranged between the quartz island film pressure conversion unit and the quartz resonance layer element as well as between the quartz resonance layer element and the quartz base part; three quartz layers and two glass frit dielectric layers are connected to form an all-quartz pressure chip; the all-quartz pressure chip, the 3J21 alloy shell and the gold-plated lead column are connected through sintering of glass silver paste, and a chip electrode signal is led out through the gold-plated lead column; according to the invention, the long-term stability of the sensor is significantly improved, the mechanical strength and reliability of electrical connection are enhanced, real-time and homologous sensing of temperature signals is realized, and the compensation precision of the sensor in a full temperature range is effectively improved.

The application provides a disposable battery residual capacity batch detection device and method in high-altitude environment, and belongs to the lithium hyposulfuryl chloride battery detection technical field.The application comprises a detection device main body and an upper computer, and the device main body comprises a power supply, temperature monitoring, control, indication, switching, battery test and parameter acquisition unit;the power supply unit comprises a power supply interface, a power supply switch, a switching power supply and a voltage reduction circuit;the temperature monitoring unit comprises a temperature measurement module and a thermocouple, the control unit comprises a controller MCU;the indication unit comprises a loudspeaker, a switching indicator lamp and a three-color indicator lamp, the switching unit comprises a de-passivation switching circuit, a multi-channel switching circuit and a pulse switching circuit;the battery test unit comprises a battery socket and a resistance load;and the parameter acquisition unit comprises a pulse test and reference voltage acquisition module.The application solves the problem that the disposable battery cannot be accurately detected due to the continuous passivation phenomenon, and can realize the accurate prediction of the disposable battery residual capacity.