6results about How to "Solve the large measurement error" patented technology

The invention relates to a gyro accelerometer data fusion method, and belongs to the technical field of high-precision acceleration measurement inertia, the gyro accelerometer data fusion method is based on an optical fiber gyro inertial navigation system with a three-axis rotating mechanism, a table body can be controlled to keep stable relative to an inertial space, and three orthogonally placed quartz accelerometers are configured on the table body; the method comprises the following steps of: configuring a pendulum-type integral gyro accelerometer in an X direction, normalizing measured values of the quartz accelerometer and the gyro accelerometer by utilizing measurement redundancy of the quartz accelerometer on acceleration information, and compensating output pulses at non-whole circle points of the gyro accelerometer, under the condition of low overload, the advantage of high-precision acceleration measurement of the gyro accelerometer at the whole precession circle point can be brought into full play; according to the invention, the problem that the measurement error of the gyro accelerometer is large under the condition of low overload in the use process of the existing fiber-optic gyro inertial navigation is solved, and the use precision of the gyro accelerometer on an inertial navigation system is improved.

The application discloses a method for obtaining a left ventricular papillary muscle target section and an ultrasonic evaluation method thereof, which comprises obtaining a standard basic section conforming to a guideline, and then determining a corresponding target section and a two-dimensional ultrasonic probe adjustment mode according to a front-lateral or rear-medial papillary muscle type to be imaged and a current standard basic section. Through taking the probe pose when the standard basic section is obtained as a benchmark, the two-dimensional ultrasonic probe is rotated by a specified angle or is directionally tilted under the premise of maintaining an acoustic window unchanged, so that an image of the target section clearly displaying a specific papillary muscle long axis or short axis shape is obtained; the problem of incomplete papillary muscle imaging and distorted shape caused by the fixed section of the conventional two-dimensional ultrasonic is solved, the target section can be repeatedly and stably obtained, and the integrity and accuracy of the papillary muscle ultrasonic imaging are significantly improved.

This invention relates to the field of marine environmental monitoring technology. Specifically, it relates to a high-power marine acoustic tomography system for marine environmental monitoring. The system includes a regional deployment and clock synchronization module, a signal generation and high-power transmission module, a signal reception and propagation time measurement module, a sound velocity calculation and reference area selection module, a sound velocity parameter weighted correction module, and an environmental parameter inversion and result fusion module. By constructing a standardized end-to-end technical solution from regional deployment, signal transmission and reception, parameter calculation to environmental inversion, it achieves large-area, high-precision, and continuous environmental monitoring of target marine areas. Through standardized gridded regional division, GPS carrier phase positioning node calibration, and high-precision clock synchronization using GPS-acquired atomic clocks, a standardized underwater mooring node network is established, ensuring the basic accuracy of underwater acoustic signal propagation time measurement and sound velocity parameter calculation from a hardware deployment perspective.

This invention relates to a keyed terminal block for a temperature calibration system, comprising an electrically insulated terminal support with N flexible clamps and N tellurium copper conductive plates. Each flexible clamp includes a pressing handle, a clamp head, a pivot, and a torsion spring. The pressing handle is hinged to the support plate, and the two arms of the torsion spring abut against the tail of the pressing handle and the base plate, respectively. The clamp head is fixed to the head of the pressing handle. Pressing the tail of the pressing handle moves the clamp head away from the conductive plates, creating a wire release gap. After releasing the pressure, the spring's restoring force drives the clamp head and the conductive plates to clamp the wire together. This invention uses tellurium copper with a low Seebeck coefficient, effectively solving the problem of poor calibration repeatability caused by high parasitic thermoelectric potential. The elastic compensation of the torsion spring automatically adapts to thermal expansion and contraction, maintaining stable contact and resisting vibration-induced loosening, avoiding poor contact due to improper operating force, and improving measurement accuracy.

The utility model relates to the technical field of length measurement, and discloses a length measuring device for sofa leather production, which comprises a support frame I. The top of the support frame I is fixedly connected with a measuring table, a sliding rail is arranged in the measuring table, and a sliding frame is arranged at the top of the support frame I; a second supporting frame is fixedly connected to the interior of the first supporting frame, a first sliding block is arranged in the second supporting frame, a measuring instrument is arranged at the bottom of the first sliding block, and an adjusting assembly is arranged in the sliding frame; the adjusting assembly comprises a second sliding block, and the second sliding block is connected into the sliding frame in a sliding mode. According to the sofa leather measuring device, the pull rod is pulled to drive the sliding block II to slide in the sliding frame, and the spring I is compressed at the same time, so that the effect of flattening sofa leather placed on the measuring table is achieved, the problems that the sofa leather is wrinkled during measurement and the measurement error is large are solved, and the accuracy of the measuring device is improved.

The utility model provides a single-point detection mechanism and a vehicle pose detection system, and relates to the technical field of logistics. The single-point detection mechanism comprises a flitch assembly, a detection driving source, a light reflecting part and a detection part, the output end of the detection driving source is connected to the flitch assembly, and the detection driving source can drive the flitch assembly to move so that the flitch assembly can make contact with the side wall of a to-be-detected vehicle; the reflecting part is arranged on one side, facing the detection driving source, of the flitch assembly; the detection part is used for detecting the position of the light reflection part so as to obtain distance data of the side wall of the to-be-detected vehicle. The detection member does not directly detect the position of the side wall of the container of the vehicle to be detected, but detects the position of the reflective member attached to the side wall, so that detection errors caused by unevenness of the side wall of the container are avoided, the surface of the reflective member is smooth and has reflective performance, data receiving of the detection member during detection is facilitated, and the detection accuracy is improved. And the detection precision is improved, so that the smooth implementation of subsequent automatic loading is ensured.