47results about How to "Small zero drift" patented technology

The invention discloses a multi-mode coupling miniature electric field sensing device based on a piezoelectric effect and a piezoresistive effect. The miniature electric field sensing device comprisesa horizontally placed semiconductor thin film, a horizontally placed substrate is arranged under the semiconductor thin film, a cavity structure is formed between the semiconductor thin film and thesubstrate through support of a middle interlayer, an upper surface of the semiconductor thin film is evenly provided with a piezoresistive material, the piezoresistive material comprises a transverse-transverse mode piezoelectric film and a transverse-longitudinal mode piezoelectric block, and in a transverse-transverse mode, a top surface of the semiconductor thin film is provided with the piezoelectric film; and in a transverse-longitudinal mode, a bottom surface of the semiconductor thin film is provided with the piezoelectric block. The multi-mode coupling miniature electric field sensingdevice based on the piezoelectric effect and the piezoresistive effect, provided by the invention, has the beneficial effects of being small in volume and highly integrated, effectively reducing circuit temperature drift, reducing zero drift, improving measurement accuracy, being capable of realizing electric field accurate measurement under wide band, high field intensity and complex environment,and also being capable of being mounted and maintained in the case of being electrified.

The invention discloses a UAV data processing method and device, and relates to the technical field of data fusion. The method includes: using multiple sensors to measure the flight state of the UAV in real time; determining the state equation according to the change process of the flight state of the UAV; obtaining a state transition matrix according to the state equation; according to the state transition matrix, using EKF to combine multiple sensors The measured value of the drone is fused to determine the attitude information of the drone. The method and device improve the real-time and precision of determining the attitude information of the UAV.

The invention discloses a Z-axis structure of an accelerometer and a production method thereof, comprising a substrate, a fixed electrode, and a mass block, a first anchor point is arranged on the surface of the substrate, and the fixed electrode passes through its end Connected to the first anchor point, the fixed electrode is suspended on the substrate through the first anchor point; an intermediate anchor point is also arranged on the surface of the substrate, and the mass block is suspended on the substrate through the intermediate anchor point Above the fixed electrodes, a plurality of through holes are arranged on the mass block and the fixed electrodes. In the Z-axis structure of the present invention, the fixed electrode is connected to the substrate through the first anchor point, so that there is a certain gap between the fixed electrode and the substrate, which cuts off the deformation transmission channel from the substrate to the fixed electrode, reducing the The contact area between the electrode and the substrate can effectively prevent the deformation of the substrate caused by external stress and temperature changes from being transmitted to the fixed electrode, greatly reducing the zero point drift of the Z-axis structure.

The invention proposes a high-precision gas micro-pressure differential meter, which includes a gas micro-pressure differential measuring device, a single-chip microcomputer, an ultrasonic transmission driving module, a first gating switch, an ultrasonic transducer A, an ultrasonic transducer B, an ultrasonic transducer Device C, second gate switch, amplifier, zero-crossing level detection module, timing gate, crystal oscillator time scale and AND gate, ultrasonic transducer A, ultrasonic transducer B and ultrasonic transducer C are all spontaneous and self-receiving formula and identical. The present invention has high accuracy of the propagation time of the ultrasonic signal measured by the above structure, and high measurement accuracy of the gas micro-pressure difference meter.