79 results about "Absolute zero" patented technology

The present invention relates to a laser differential confocal tomography focusing method and device, and relates to the technical field of optical imaging and detection. The method uses a rear pupilto block half of a measurement beam, uses a spectroscopic differential confocal detection system to detect the unblocked measurement beam, and uses an absolute zero point of a differential confocal response curve to achieve high precision tomographic focusing. The method organically combines a laser differential confocal technique and a ray tracing technique to establish a ray tracing and compensation model to eliminate influence among each fixed focal surface parameters, and achieves fast trigger of focus through data near a linearly fitting absolute zero point. The method can obtain the differential confocal response curve by using only one detector, and realizes the tomographic focusing through the absolute zero point of the differential confocal response curve, greatly simplifies system structure, in the same time, avoids error introduced by adjustment inaccuracy, and greatly improves precision of focusing. The method will provide a new technical approach to the field of confocal imaging/detection.

The invention belongs to the technical field of optical precision measurement and relates to an optical axis and thickness measurement method and a device of a differential confocal internal-focusing lens. By means of an internal-focusing objective lens, the method utilizes an auto-collimation method to adjust the optical axis of the lens precisely; utilizes the characteristic that when a differential confocal response curve passes the absolute zero point, the vertex of a differential confocal light cone and the surface vertex of the lens to be measured can coincide to achieve the precise positioning of the surface vertex of the lens and to obtain a numerical aperture angle of emergent lights in two-time positioning of the vertex of the differential confocal light cone; and utilizes a ray tracing formula to calculate the central thickness of the lens. Meanwhile, an annular pupil is introduced during the light path measurement, the influence of aberration on a measurement result is reduced. By combining differential confocalization with internal focusing for the first time, and providing optical axis and thickness measurement principle of the differential confocal internal-focusing lens, the lens optical axis and thickness measurement method and device of the differential confocal internal-focusing lens has the advantages of being high in measurement speed, high in precision, high in sensitivity, simple in structure and long in working distance, and is applicable to non-contact high-precision measurement of the light axis and the central thickness of lens.

The invention discloses a zero passage voltage detection and compensation method which is characterized by including the steps that: a timer is started up after zero passage voltage interrupt signals are received and the timing time of the timer is the offset time of a zero crossing point of voltage; the interrupt point of the timer is determined as the zero crossing point of the voltage after the interrupt signals of the timer are received. The invention also discloses a corresponding zero passage voltage detection and compensation device. The method and the device of the invention can accurately detect an absolute zero crossing point of the voltage without adding hardware cost and can be applied to occasions demanding very accurate zero passage signals.

The invention provides a steering controlling method of an automatic steering device of an unmanned vehicle. The steering controlling method comprises the following steps that an absolute zero position is demarcated; a steering controller controls the unmanned vehicle to enter an automatic driving mode; the steering controller amends an expected steering angle of an output shaft of a motor (111); the steering controller obtains an actual steering angle of the output shaft of the current motor (111) through an encoder (115); and the steering controller controls an algebraic difference value of the expected steering angle and the actual steering angle, and steering is achieved. The controlling steps are simple; switching between manual driving and automatic driving can be completed; software is adopted to conduct limiting; setting is relatively flexible; the phenomenon of overlarge steering of a steering wheel can be effectively prevented; and precise steering is achieved.

The invention relates to a laser differential confocal curvature radius measuring method and a laser differential confocal curvature radius measuring device, which belong to the technical field of optical precision measurement. The laser differential confocal curvature radius measuring method utilizes a post-positioned pupil to block half of a measuring beam, uses a light splitting pupil differential confocal detection system for detecting a measuring beam to obtain a differential confocal response curve, and utilizes an absolute zero point of the differential confocal response curve to perform precise focus fixation on a surface vertex position and a sphere center position of a spherical element separately, so as to obtain a curvature radius of the element. According to the laser differential confocal curvature radius measuring method and the laser differential confocal curvature radius measuring device, the post-positioned light splitting pupil laser differential confocal technologyis applied to the high-precision detection of the curvature radius of the spherical element for the first time, the differential confocal focus fixation and curvature radius measurement is realized byusing only one path of detector, the system structure is simple, the assembly and debugging difficulty is reduced, the possible decrease of focus fixation precision caused by replacement of a measured lens is avoided, further the measurement precision is improved; and data near a zero point of the differential confocal response curve is subjected to linear fitting, so as to achieve fast triggering of the focus fixation and measurement, thus the measurement speed and precision as well as the scattering resistance are greatly improved.

The invention relates to a robot position detecting device and method. The method includes the steps that a robot is powered on, and the first position information of a single-ring absolute value encoder at this moment is read; the first position information and zero-point position information are calculated, so that position information of an actuating mechanism is obtained, and the zero-point position information is the position information corresponding to the single-ring absolute value encoder when the actuating mechanism is located at an absolute zero point position; and afterwards, an incremental encoder is used for detecting the position information of a first output shaft. No back-to-zero operation is required when the robot is restarted after power failure, the battery memory position does not need to be added after power failure, either, and there is no need to obtain the actual position of the robot by finding reference points again. Assembling is easy, the structure is flexible, and cost is low. The update speed of the position information is high, and precision is also high. The response performance and working efficiency of the robot can be better improved.

A method for producing an electrically-powered device and/or component that is embeddable in a solid structural component is provided. The electrically powered device includes an attached autonomous electrical power source in a form of a unique, environmentally-friendly structure that is configured to transform thermal energy at any temperature above absolute zero to an electric potential without any external stimulus including physical movement or deformation energy. The autonomous electrical power source component provides a mechanism for generating renewable energy as primary for the electrically-powered device and/or component once an integrated structure including the electrically-powered device is deployed in an environment that restricts future access to the electrical power source for servicing, recharge, replacement, replenishment or the like. The structure of the autonomous electrical power source component converts minimal thermal energy to a usable electrical power potential over a sustained period of time without external disturbance to the power source.

The invention discloses a calibration method for synthesizing a far field through a single detector to improve double-beam synthesis precision and pointing precision. According to the calibration method, the detection target surface of the same detector is subjected to area division, and four paths of measurement information are adjusted into four different areas which correspond to the real-time state information of a beam combination pupil, beam combination optical axes, a path A laser optical axis and a path B laser optical axis respectively. A path of laser and B path of laser are used for emitting light in the calibration process, the beam combination optical axes A1' and B1' are located on the absolute zero point of the center of the area in a closed loop mode, and after the coordinates of the beam combination optical axes A2' and B2' are respectively calculated, closed loop work is performed with the beam combination optical axes A2' and B2' as zero points. By means of the calibration method, calibration cost can be substantially reduced, a calibration structure is simplified, errors caused by equipment environment temperature and vibration are effectively eliminated, synthesis precision and stabilization precision of double beams on the target face of the detector are guaranteed, and therefore the synthesis precision and the pointing precision of output laser beams are improved.

An apparatus and associated method for an energy-storage device (e.g., a capacitor) having a plurality of electrically conducting electrodes including a first electrode and a second electrode separated by a non-electrically conducting region, and wherein the non-electrically conducting region further includes a non-uniform permittivity (K) value. In some embodiments, the method includes providing a substrate; fabricating a first electrode on the substrate; and fabricating a second electrode such that the second electrode is separated from the first electrode by a non-electrically conducting region, wherein the non-electrically conducting region has a non-uniform permittivity (K) value. The capacitor devices will find benefit for use in electric vehicles, of all kinds, uninterruptible power supplies, wind turbines, mobile phones, and the like requiring wide temperature ranges from several hundreds of degrees C. down to absolute zero, consumer electronics operating in a temperature range of −55 degrees C. to 125 degrees C.

The digital display horizontal and dip measurer includes casing and angle measurer. The angle measurer is capacitive angle measurer, and the casing is connected and fixed to the main grating or subsidiary grating of the capacitive angle measurer. There are also a gravitational vertical device always in vertical state connected and fixed to the subsidiary grating or main grating of the capacitive angle measurer for coaxial rotation inside the casing; and a precise position switch to determine the absolute zero position on the casing. The gravitational vertical device consists of weight, bearing shaft and float with position and shape axially symmetrical about the weight axis. The present invention has simple structure, low cost, precise measurement and stable performance, and may be used in harsh environment.

The invention discloses a force moment zero-searching method for an elastic drive joint. The method comprises the following steps of: systemically electrifying the elastic drive joint, and starting a motor; positively or negatively rotating the motor at low speed, and stopping rotation of the motor when current of the motor is greater than a current threshold value; obtaining feature motor current when the motor reaches a feature point, a feature relative motor rotation angle measured by an incremental coder and a feature joint angle measured by an absolute type position sensor in a rotation process of the motor; and determining a relative angle between an electrifying reference zero point and an absolute zero point on the incremental coder according to the feature motor current, the feature relative motor rotation angle, the feature joint angle as well as a pre-determined first feature relative angle when the motor reaches a feature point and an absolute zero point at the first time after starting. The force moment zero-searching method disclosed by the invention realizes zero-searching of the incremental coder, so that the incremental coder can be used for measuring deformation amount of an elastomer; and moreover, an SEA joint structure is simplified, and the production cost is reduced.

The invention discloses a method for treating errors of the angle measurement of a circular grating and compensating the skew of a shafting. The method comprises the following specific steps: the real-time location information of a rotation angle acquired by a reading head which is matched with a circular grating disc is collected by a field programmable gate array (FPGA); after calculation and treatment, the FPGA outputs an angle count value which corresponds to the position of the rotation angle and transmits the angle count value to a central processing unit; the central processing unit calculates the rotation angle value relative to an absolute zero position of the current rotation angle position and displays and outputs calculation results; and the vertical angle error caused by the skew of the shafting is compensated and corrected. The method has the beneficial effects that by the method of correcting angles by the piecewise linearity, angle values are corrected piecewise and the skew errors of the shafting are compensated in real time in the working range of the circular grating, so that the requirements of precise angle measurement in complex environment and under limited condition of high-precise circular gratings are realized and the accuracy of the angle measurement of calibration instruments of angle measuring and orienting equipment is increased.

The invention relates to a method and device for measuring the refractive index of a rear spectrophotometric pupil laser differential confocal lens, and belongs to the technical field of optical precision measurement. According to the method and the device in the invention, half measurement beams are kept out by utilization of a rear pupil; front and rear surface vertexes of a measured lens are respectively fixed precisely by utilization of the absolute zero point of a differential confocal response curve; and the refractive index is obtained through ray tracing and a compensation model thereof. According to the method and the device in the invention, a rear spectrophotometric pupil laser differential confocal technology is used for high-precision detection of the refractive index of the lens for the first time; differential confocal focus-fixing and lens refractive index measurement can be realized only by one detector; a laser differential confocal technology and a ray tracing technology are organically fused; ray tracing and the compensation model thereof are established, so that influence among various focused surface parameters is eliminated; furthermore, the data near the absolute zero point is linearly fitted, so that quick trigger focusing is realized; the system structure and the installation and debugging process are greatly simplified; the problem that the focus-fixing precision is decreased possibly due to replacement of the measured lens is avoided; and the measurement speed and precision and the anti-scattering capability are greatly improved.

This invention relates to one method by use of transmission grating to generate zero calibration mark, which adopts two blocks of grating with special coding zero mark an comprises the following steps: putting the grating on z direction and beam goes vertical to the grating; then fixing the reflection grating on the back of transmission grating along z direction parallel to the transmission grating and is reflected back and making two gratings calibrate through adjusting reflection grating angle and position to get the absolute zero position in X-Y plane; adding split prism on the light path to set photoelectricity receiver to receive light signal for judging and reading.

The invention discloses an oil cylinder stroke detection and control method based on hydraulic oil volume flow. The oil cylinder stroke detection and control method is characterized by comprising thefollowing steps that the volume change amount and the flow direction of the hydraulic oil in the oil cylinder are calculated by adopting a volumetric flow meter; the leakage coefficient is considered,according to the volume change amount of the hydraulic oil in the oil cylinder, the flow direction and the sectional area of the cylinder barrel, an oil cylinder stroke calculation value expression is obtained; the actual stroke value of each time of the oil cylinder is measured and recorded manually, the obtained oil cylinder stroke calculation value is combined, the final oil cylinder stroke detection value expression is determined through linear regression, and the absolute zero point and the full stroke position of the stroke are calibrated according to the proximity switch signal; the travel controller module is used for realizing collection, parameter setting, operational processing, display and control output of the volumetric flow meter and the proximity switch signal, and the oilcylinder stroke is accurately detected and positioned; the oil cylinder, the flow meter and the travel controller module are designed into an integrated device. The oil cylinder stroke detection andcontrol method is compact in structure, is not influenced by the stroke of an oil cylinder and is low in cost, does not need special machining of the oil cylinder body, and is easy to realize.

The invention relates to a method and device for measuring the axial clearance of a rear spectrophotometric pupil laser differential confocal lens group, and belongs to the technical field of opticalprecision measurement. According to the method in the invention, half measurement beams are kept out by utilization of a rear pupil; measurement beams are detected by utilization of a spectrophotometric pupil laser differential confocal detection system; various surface positions of the measured lens group are respectively fixed by utilization of the absolute zero point of a differential confocalresponse curve; and each axial clearance in the lens group is calculated through tracing and a compensation model thereof. According to the method and the device in the invention, a rear spectrophotometric pupil laser differential confocal technology is used for high-precision detection of the axial clearance of the lens group for the first time; differential confocal focus-fixing can be realizedonly by one detector; a laser differential confocal technology and a ray tracing technology are organically fused; influence among various focused surface parameters is eliminated; furthermore, the data near the absolute zero point is linearly fitted, so that quick trigger focusing is realized; the problem that the focus-fixing precision is decreased possibly due to replacement of the measured lens is avoided; and the measurement speed and precision and the anti-scattering capability are greatly improved.

A mechanical absolute zero position controlling method in a stepping motor driving system adopts a two-step positioning method. The method is as follows: firstly, an in place sensor is used for receiving an in place signal of the distance between a moving machine moving to a baffle block and the preset gap; the signal is transformed and conditioned and then is transmitted to a controller; the controller switches off electricity to a stepping motor as soon as receiving the signal, which is a coarse positioning; then, the heteropolar magnets which are arranged face to face at the corresponding position of the end of the moving machine and the stepping motor are pulled in each other to achieve a precise position, that is an absolute zero position. The mechanical absolute zero position controlling method in the stepping motor driving system designed by the method is provided with the stepping motor controlled by a controller; the stepping motor drives the moving machine to move along a guide rail to the baffle block in a straight line. The end of the moving machine is provided with an in place sensor, an in place sensor output connected with the controller by a adjusting and shaping circuit. Two heteropolar magnets are arranged face to face on the corresponding position of the end of the moving machine and a dead baffle block respectively.

An electromagnetic shake table using absolute position feedback to realize active positive rigidity resilient support belongs to the vibration metering technical field; the active positive rigidity resilient support method employs an absolute type linear raster ruler as a feedback displacement sensor, and outputs a Lorentz force in a constant proportion with the relative displacement of the absolute zero point position, thus enabling an electromagnetic shake table moving-coil to have the linearity rigidity resilient support in large stroke motions; the electromagnetic shake table moving-coil is connected in series with multistage power resistors so as to increase the load impedance, thus allowing a power amplifier to have a high signal to noise ratio while outputting a milliampere level ultralow frequency current; the electromagnetic shake table can combine the large stroke with the linear resilient support and the high signal to noise ratio, thus providing a large stroke high performance electromagnetic shake table control technology scheme for the ultralow frequency vibration calibration.

The invention relates to a displacement and velocity sensor. The sensor comprises an image signal source, a flat-panel detector and a processing circuit; the flat-panel detector carries out imaging on the image signal source, converts image signals into electrical signals and then transmits to the processing circuit; and the processing circuit calculates and processes received electrical signals, and outputs signals indicating the displacement and velocity physical quantities of objects to be detected. By adopting the invention, the measurement values of displacement and velocity with higher accuracy can be obtained easily; the sensor can be installed and debugged with an object to be detected without the need of separately setting absolute zero information, then absolute zero is set, after installation and utilization, the sensor can be easily adjusted, even disposal methods can be changed, thus the sensor is convenient for installation and debugging, and easy for correction and function expansion.

The invention discloses a frame drive power supply integrated component, belonging to the field of space actuating mechanisms. The frame drive power supply integrated component comprises a frame supporting component, a conducting ring component, an ultrasonic motor component, a double-channel absolute zero circular inductosyn component, a synchronizer rotor locking nut and a conducting ring fixing plate. The frame drive power supply integrated component implements integration design of the frame drive component and the frame power supply component; the frame motor adopts the novel ultrasonic motor; the angular measurer adopts the double-channel absolute zero circular inductosyn component, thereby implementing high precision, low power consumption and light weight; and the frame drive power supply integrated component is suitable for small satellites.