32results about How to "Improve accurate measurements" patented technology

A non-contact method and apparatus for inspecting an object. At least one first image of the object on which an optical pattern is projected, taken from a first perspective is obtained. At least one second image of the object on which an optical pattern is projected, taken from a second perspective that is different to the first perspective is obtained. At least one common object feature in each of the at least one first and second images is then determined on the basis of an irregularity in the optical pattern as imaged in the at least one first and second images.

The invention discloses an FPGA accelerator which realizes unloading and acceleration of a network test protocol in an FPGA by using an accelerator based on the FPGA, and task data does not need to be transmitted to a CPU (Central Processing Unit) for processing when being transmitted and received, so that the load of the CPU is reduced; the FPGA accelerator is high in data processing capacity, the full-bandwidth test requirement can be met, and high-precision measurement is achieved; meanwhile, an application program module in the equipment is built based on an Iperf protocol, and the Iperf protocol can be replaced based on test requirements, so that the expansibility is good; and due to the dynamic programmable characteristic of the FPGA accelerator, a corresponding test environment can be set up at any time according to needs, all operations are only execution of software instructions, hardware board cards do not need to be replaced, hardware connection relations do not need to be changed, and rapid positioning of faults is facilitated. The invention also discloses a network parameter measurement system and method and a readable storage medium, which have corresponding technical effects.

The invention discloses an apparatus used to scribe curves on the surface of the geologic structure deformation model, the test chamber is fixed on the operating console, the X direction traveler is mounted on the both sides of the operating console, and the sand hopper bracket is supported by the X direction traveler and could travel along it, the Y direction traveler is mounted on the sand hopper bracket, the leaking sand device is mounted on the Y direction traveler and could travel along it. The retaining bracket of leaking sand device is set on the Y direction traveler, the sliding rail is mounted on the retaining bracket by the mounting plate, the sand hopper is mounted on the rail via slide block and the vertical height could be adjusted by actuating device, and the open and close device is mounted in the inner of sand hopper. The up-down regulating device could take the sand hopper up and down via the up-down thong. The invention can prevent the model surface from damaging, draw canonical and pretty color grips simultaneously, and find the deforming location according to the displacement of sand after the deformation of test model. The invention improves the requirement for the accurate measurement of the finite strain and quantitative analysis. The apparatus is simple in structure and easy to use.

The invention discloses a direct current weak signal three-level calibrating method for a formation water specific resistivity logging instrument. The direct current weak signal three-level calibrating method for the formation water specific resistivity logging instrument is characterized by comprising instrument level calibrating, channel level calibrating and real-time period level calibrating;the instrument level calibrating is that a simulation box is used for calibrating a constant direct current power source of the instrument, performance of a whole analog channel and a function of a digital channel; the channel level calibrating is that a calibrating device is used for calibrating the performance of the whole analog channel and the function of the digital channel; and the real-timeperiod level calibrating is that by means of DAC, a series of fixed positive and negative voltage values are emitted according to a preset timing sequence, a calibrating relay is controlled to send signals into a measuring channel, by means of amplification and treatment of n different pre-amplification channels and multichannel gating switch and smoothing, and collecting is carried out through ADC according to a preset timing sequence. By means of the direct current weak signal three-level calibrating method for the formation water specific resistivity logging instrument, the accuracy of signal measuring and collecting of the formation water specific resistivity logging instrument is improved, and the adaptivity of the instrument to different well conditions is also improved.

The invention belongs to the technical field of medical apparatuses and instruments and discloses a inductance-variable wireless intraocular pressure monitoring sensor based on a microfiber pipe. Thesensor comprises a corneal contact lens (1), the microfiber pipe (2), liquid metal (3) and a patch capacitor (4), wherein the microfiber pipe and the liquid metal integrally form an inductor and are coupled with the patch capacitor to form an LC resonant sensor; the inductance value of the inductor is influenced by intraocular pressure, so that the resonance frequency of the LC resonant sensor isalso influenced by the intraocular pressure; real-time sensing monitoring of the intraocular pressure can be realized by reading the change of resonance frequency. By combining the characteristics ofclinical application of intraocular pressure monitoring and adopting the LC sensor formed by the microfiber pipe and the capacitor which are filled with the liquid metal, the intraocular pressure is monitored, and a specific structure and specific setting mode of the LC sensor are designed; the intraocular pressure can be monitored by reading the change of the resonant frequency of the LC sensor.

The invention relates to a driving mechanism of an omnidirectional mobile robot. The existing driving mechanism has low degree of freedom. A substrate is provided with a rotation driving motor; the rotation driving motor drives a driving rotation measuring wheel and a driving rotation driving wheel; a coder is installed below the driving rotation driving wheel; the driving rotation driving wheel is connected with a driven rotation driving wheel through a rotation driving belt; the driven rotation driving wheel is installed in a bearing between an upper cover and a lower cover; the rotation driving wheel drives a rotation axis; the bottom of the rotation axis is fixedly connected with a wheel bracket; the wheel bracket is internally provided with a rolling wheel; and the up-and-down movement of the wheel bracket is finished by the combined action of a damping spring and the rotation axis. The rolling wheel has three degrees of freedom, and the adaptability to landforms is increased on rough terrain.

The invention provides a conical pin size measuring device and a measuring method. The conical pin size measuring device comprises a reference block, reference holes and a distance measuring device. When the measuring device is used, a conical pin is placed into two groups of reference holes and perpendicular to a reference plane, the hole diameter of each reference hole is positioned between the diameter of a large end and the diameter of a small end of the conical pin to be measured, the conical pin to be measured is placed into a first reference hole and a second reference hole, the small end of the conical pin to be measured enters the reference holes, the large end of the conical pin to be measured does not enter the reference holes, the diameter of the first reference hole is A1, and the diameter of the second reference hole is A2. When the conical pin to be measured in the reference holes is measured by the aid of a depth indicator, the distances B1 and B2 between the large end face of the conical pin and the reference surface are measured by a depth gauge when the conical pin is placed in the two reference holes, and finally, the taper and the diameter of the large end of the conical pin are calculated. According to the device, measuring processes are simpler and more convenient, the size of a nonstandard conical pin can be simply, conveniently, rapidly and accurately measured, and the device has the advantages of simple structure, convenience in use, high practicability, easiness in popularization and the like.

The invention relates to an immersed virtual reality medical image platform based on multi-user sharing. The platform comprises a control system as well as an operating part, communication equipment and a control bus which are electrically connected to the control system, wherein the control bus is electrically connected to an X ray control part and an X ray detection rotary module; the X ray control part and the X ray detection rotary module are electrically connected to a three-dimensional imaging detection platform; the three-dimensional imaging detection platform can implement an X ray imaging operation under control of the control system, and then, data of multi-directional imaging can be transmitted to an X ray imaging detection module by virtue of the three-dimensional imaging detection platform; the X ray imaging detection module is in controlled connection to the control system; and the X ray imaging detection module can transmit images to an image display module after data undergoes such processes as X ray two-dimensional imaging acquisition, data storage, integrating module data calling, model reconstruction, image generating and displaying processing, and then, the images are transmitted to display equipment by virtue of a communication module.

The invention discloses force sensing lifting equipment and a control method, the lifting equipment comprises a winch assembly, a force sensing handle assembly and a cable, the two ends of the cable are connected with the winch assembly and the force sensing handle assembly respectively, and a hanging assembly is connected to the force sensing handle assembly; the winch assembly comprises a winch controller, a winch motor, a motor driver and a first wireless module, the winch controller is electrically connected with the motor driver and the first wireless module, and the motor driver is electrically connected with the winch motor; the force sensing handle assembly comprises a handle controller, an unlocking module, a gravity sensor, an operating force sensor and a second wireless module, the handle controller is electrically connected with the unlocking module, the gravity sensor, the operating force sensor and the second wireless module, and the first wireless module and the second wireless module are in communication connection. According to the invention, the motion trend of the heavy object is consistent with the operation intention under low power consumption, a redundancy control method is considered, and the operation convenience of the lifting equipment is improved.

The invention discloses a method for performing algorithm denoising by using a motion sensor to cooperate with electrocardiogram monitoring. The method comprises the following steps of debugging an electrocardiogram sensor and the motion sensor to the same detection frequency; setting the electrocardiogram sensor and the motion sensor to be under the same starting control to ensure the simultaneous starting which is obviously easy to be realized in the previous SOC scheme; obtaining electrocardiogram sensing data of a continuous moment and motion sensing data of the continuous moment by usinga timer; through a gateway, collecting the electrocardiogram sensing data of the continuous moment and the motion sensing data of the continuous moment in the third step by a server; performing combination and association on the electrocardiogram sensing data of the same moment and the motion sensing data of the continuous moment; and selecting the motion sensing data with the same parameter at different moments, and extracting corresponding electrocardiogram sensing data to obtain an average value of the electrocardiogram sensing data. The invention provides the method for performing algorithm denoising by using the motion sensor to cooperate with electrocardiogram monitoring; the accuracy of electrocardiogram detection can be improved by threshold elimination and motion sensing data average value denoising methods; and a mode for improving measurement accuracy is provided under the condition of changing the application scene of electrocardiogram detection.

The invention belongs to the field of eye pressure sensing, and discloses a contact lens visual eye pressure sensor based on a strain sensing mechanism and preparation thereof. The sensor comprises acornea contact lens (1) formed through conformal bonding, a micro-cavity (2), a sensing channel (3) and an air chamber (4). The micro-cavity is fully filled with dyeing function liquid (6). One end ofthe sensing channel is communicated with the air chamber, and the other end of the sensing channel is connected with the micro-cavity. The sensing channel is used for balancing the pressure between the air chamber and the micro-cavity. When the eye pressure changes, the deformation of the micro-cavity is caused, and the pressure difference is generated between the air chamber and the micro-cavity. By monitoring the position of a gas-liquid interface in the sensing channel, the eye pressure can be monitored. The soft curved surface microfluidic contact eye is prepared through conformal bondingand internally provided with the micro-cavity, the sensing micro-channel and the air chamber, and the contact eye is simple in structure, convenient to use, soft and comfortable to wear, high in sensitivity, large in dynamic range and quite suitable for the eye pressure sensing field.

The invention discloses a demodulation method of a differential circular inductosyn. The demodulation method comprises the following steps: acquiring a main value interval electrical angle of a coarsechannel and a main value interval electrical angle of a fine channel, and acquiring a first mechanical angle; performing synchronous compensation correction on each period of the main value intervalelectrical angle of the coarse channel and each period of the main value interval electrical angle of the fine channel to obtain a corrected main value interval electrical angle of the coarse channeland a corrected main value interval electrical angle of the fine channel; obtaining a second mechanical angle according to the corrected main value interval electrical angle of the coarse channel andthe corrected main value interval electrical angle of the fine channel; judging whether the corrected main value interval electrical angle of the coarse channel and the corrected main value interval electrical angle of the fine channel are adjacent or not according to a preset condition, and obtaining the period number of the fine channel electrical angle according to the judgment result and the second mechanical angle; and obtaining a third mechanical angle according to the period number of the fine channel electrical angle and the corrected main value interval electrical angle of the fine channel. The measurement precision of the mechanical angle is improved.