16results about How to "Solve the large measurement error" patented technology

The utility model discloses a gauge for measuring the length of an inner groove. The gauge comprises a dial indicator. The measuring assembly comprises a rotatable measuring rod which is connected with the dial indicator, a detecting block is arranged on the circumferential wall of the measuring rod, and the detecting block can be driven to be screwed into the inner groove of the workpiece to be measured by rotating the measuring rod; the thickness of the detection block is gradually reduced along the direction in which the detection block is screwed into the inner groove, so that an inclined abutting surface is formed on the top surface or the bottom surface of the detection block; the detection block is gradually screwed into the inner groove of the to-be-detected workpiece to enable the abutting surface to abut against the side wall of the inner groove so as to drive the measuring rod to slide in the axial direction of the to-be-detected workpiece. According to the utility model, through the inclined arrangement of the abutting surface, the height position of the side wall of the inner groove is converted into the movement of the measuring rod along the height direction, then the movement is transmitted to the dial indicator, and the length of the inner groove can be measured by reading the numerical value of the dial indicator, so that the original scheme of measuring through a vernier caliper is replaced; the problems that a caliper cannot extend into a workpiece to be measured due to the small aperture of the workpiece to be measured and the measurement error of the caliper is large are solved.

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 invention provides an irregular blocky solid heat conductivity coefficient measuring device and a measuring method thereof, and belongs to the technical field of irregular blocky solid heat conductivity coefficient measurement. The problems that randomness exists when an existing measuring device selects a heating point, and sometimes, a temperature rise signal of the selected measuring point is not obvious, so that measurement errors are large are solved. The device comprises a CT detector, a three-dimensional scanner, a computing system, a pulse light source system, a temperature detection device, a rocker arm, a rotary table, a rotary guide rail and a horizontal moving mechanism arranged on a test bed, the rotary table is installed on the horizontal moving mechanism, and the three-dimensional scanner is installed on the side face of the horizontal moving mechanism. The CT detector is located above one end of the horizontal moving mechanism and installed on the test bench, the rotary guide rail is installed at the other end of the horizontal moving mechanism, the temperature detection device is installed on the rotary guide rail, the pulse light source system is installed on the rocker arm, and a sample to be detected is placed on the rotary table. The device is mainly used for non-destructive measurement of porous materials.

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.

The invention relates to a transformer on-line oil level monitoring device without power outage, which comprises at least one oil level detection device, at least one intelligent gateway and an intelligent management platform, and is characterized in that each intelligent gateway is respectively connected with a plurality of oil level detection devices and establishes data communication connection; the intelligent management platform is connected with a plurality of intelligent gateways and establishes data communication connection; the oil level detection device is fixedly installed at the bottom of an indoor and outdoor transformer oil conservator. The device has the advantages of being reasonable in structure, timely and accurate in measurement, capable of achieving early warning, improving inspection efficiency and guaranteeing safe and reliable operation of a power grid.

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 provides an electronic tag, and relates to the field of sports activities. According to the scheme, the electronic tag comprises a first clamping plate, a second clamping plate, a torsion spring, a connecting shaft, an RFID tag and a number plate, the lower side of the first clamping plate comprises two oppositely-arranged connecting rods, a connecting shaft is installed between the two connecting rods, the lower side of the second clamping plate comprises two oppositely-arranged rotating rods, the two rotating rods are located on the inner sides of the two connecting rods, the connecting shaft penetrates through the two rotating rods, the torsional spring is arranged on the connecting shaft in a sleeving mode, and one side of the torsional spring is connected with the connecting rods. The other side of the torsional spring is connected with a rotating rod; the RFID tag is connected with the number plate, and the number plate is detachably connected with the first clamping plate. The number plate can be prevented from being clamped between the clothes and the ring, so that the competition result is more accurate.

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.

A drying control method and a washing and drying all-in-one machine using the same are characterized in that the drying control method comprises the following steps: 1, dividing drying work gears; 2, performing initialization setting; 3, the current air inlet temperature is detected; fourthly, whether the stable air inlet temperature is reached or not is judged, and if yes, the next fifth step is executed; if not, returning to the step 3; 5, the amount of the clothes is judged, and drying work gears are determined; 6, the current air outlet temperature is detected; 7, judging whether a preset drying stop temperature is reached or not, and if so, executing the next step 8; if not, returning to the step 6; and 8, stopping the drying procedure, and ending the procedure. The method has the advantages that the amount of the clothes is firstly judged through the stable air inlet temperature, different air outlet temperature dry judgment points are matched according to the amount of the clothes, the situation that the small-mass clothes are over-dried and the large-mass clothes are not dry due to the same temperature dry judgment point is avoided, and the control method is simple and easy to implement.

The invention belongs to the field of electronic glass detection, and relates to a device and a method for testing deformation quantity of electronic glass during high-temperature heat treatment. Comprising a furnace body, a heating element, a temperature measuring element and a sample supporting frame are arranged in the furnace body, a sample is placed on the sample supporting frame, the interior of the furnace body is heated through the heating element, a laser sensor is arranged on one side of the furnace body, the length of the sample is measured, measured data are transmitted to a PC terminal, and the measured data are displayed on a liquid crystal display screen. The laser sensor is used for measuring the length of the sample, the problem that an existing scribing method is large in measuring error is solved, the measuring precision is improved, the heating element and the PID controller are used for controlling the temperature to rise evenly, the problem that deformation difference is large is solved, and the yield is improved.

The present invention relates to a three-electrode microfluidic dielectric measurement system for a microfluidic chip and a preparation method thereof, and belongs to the field of electrical technology. The system comprises a microfluidic layer, an upper conductive glass and a lower conductive glass; the upper conductive glass and the lower conductive glass are respectively located on both sides of the microfluidic layer, and the conductive surfaces of the upper conductive glass and the lower conductive glass are bonded toward the microfluidic layer; the conductive surface of the upper conductive glass is etched to make the high-voltage electrode among the three electrodes; the conductive surface of the lower conductive glass is etched to make the low-voltage electrode and the shielding electrode among the three electrodes; the present invention realizes accurate measurement of the dielectric parameters of the microfluid in the microfluidic chip, and does not affect the microscopic observation of the fluid state in the microchannel.

The present invention provides an insulator resistance measuring device, comprising: a box body, a housing cavity inside the box body, the housing cavity is used to accommodate a measuring assembly and an insulator, and a measuring instrument is arranged on the top of the box body; the measuring assembly comprises two clamping components, each of which comprises a clamping disk, a conductive rod and a support member, two support members are arranged on the clamping disk, each support member is used to contact the circumferential side wall of the insulator, and the two support members are movably arranged toward each other along a third preset direction, so that the two support members clamp the insulator and drive the insulator to move to a measuring position; one end of the conductive rod is electrically connected to the measuring instrument, the conductive rod is movably arranged on the clamping disk, and the two clamping components are movably arranged toward each other along a first preset direction, so that the conductive rod moves along the radial direction of the clamping disk until the other end of the conductive rod abuts against the insulator at the measuring position. The present invention solves the problem that the measuring instrument in the prior art has a large measurement error for the insulator resistance.

The invention discloses a rapid measuring device for the diameter of a container barrel and a pipeline, the device comprises a flexible rule, a shell with an opening, a rotating shaft, an angle sensor and a microprocessor with a display screen, the rotating shaft is arranged at the center of the shell, the angle sensor is arranged in the shell and connected with the rotating shaft, the angle sensor detects signals and transmits the signals to the microprocessor, and the microprocessor is connected with the rotating shaft. The flexible rule is wound on the rotating shaft and the end part extends out of the opening of the shell. The device overcomes the defects of a traditional measurement mode, automatic real-time measurement of the diameters of the container barrel and the pipeline is achieved, the problem that the measurement error is large is solved, and the measurement operation efficiency is effectively 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.