43results about How to "Calibration is easy to operate" patented technology

The invention provides a calibration method of pose position-free constraint line laser monocular vision three-dimensional measurement sensor parameters and belongs to the technical fields of optical measurement and mechanical engineering technologies. After basic data are extracted, imaging points are sequenced according to the invariance of a vector quantity cross product direction set composed of the imaging points of target feature points in any shooting pose position, and corresponding relation between the target feature points and the imaging points is built. Light plane feature points are extracted through quadrilateral intersection composed of a light knife central point set fitting straight lines and the target feature points, and a three-dimensional coordinate is calculated according to an intersection invariance principle. Inner and outer diameters in a monocular vidicon and light plane diameters of a line laser projector are optically fitted and calculated, and accurate calibration of the line laser monocular vision three-dimensional measurement sensor parameters is achieved. In calibration, a target can freely move and rotate completely, pose position placing is free of restraint, the same group of calibration images is shared for calibration of two parts of diameters, the calibration accuracy of a three-dimensional measurement sensor is ensured, and simultaneously calibration steps are simplified.

The invention discloses a PMSM rotary transformer zero position initial angle calibration method and calibration system. The PMSM rotary transformer zero position initial angle calibration method comprises steps of connecting an PMSM, on which a rotary transformer is installed, to a driving motor, enabling a motor stator of the PMSM to perform three-phase short circuit, using the driving motor to drive the PMSM to rotate forward and maintain at a preset rotation speed, using an electronic control unit to perform sampling on three phase current Ia, Ib and I c and a rotary transformer reading phi read at a same moment, using the rotary transformer reading phi read to perform Park conversion on three phase current Ia, Ib and Ic to obtain current vectors Is,p, calculating a vector angle theta p corresponding the current vector Is,p, using the driving motor to drive the PMSM to rotate backwards and maintaining the rotation at a preset rotation speed, using the electronic control unit to record a vector angle theta n corresponding to a current vector Is,n when the motor is rotated backwards, and calculating that a practical electric rotation angle theta 0 corresponding to the rotary transformer reading zero point angle is a zero position initial angle according to a formula theta 0=(thetap+thetan)/2-180 degree.

The invention relates to the field of positioning, and particularly relates to a stage laser positioning calibration device and a stage laser positioning calibration method. The device comprises a master control manipulator, a display and a laser scanning transmitter installed above a stage, wherein the master control manipulator is connected with the display and the laser scanning transmitter respectively. The device also comprises a positioner arranged on a positioning object and a positioning data receiver in wireless connection with the positioner, wherein the positioning data receiver is connected with the master control manipulator. According to the stage laser positioning calibration device and the stage laser positioning calibration method provided by the invention, the defect that a laser projection effect is affected by stage light when a camera is adopted for shooting the stage can be overcome, the high cost of the camera is saved and an image analysis step which is needed after the camera is used for shooting images is omitted, and the entire calibration device is simple in structure, convenient for calibration operation, high in positioning and calibration speeds, and low in cost.

The invention discloses an electromagnetic valve control circuit which comprises an electromagnetic valve, regulating devices and a main control circuit; the main control circuit and the regulating devices are connected through a change-over switch; the regulating devices control the electromagnetic valve through the main control circuit; and the main control circuit comprises an external closed loop control system circuit and an internal reference circuit. The electromagnetic valve control circuit has the beneficial effects that: a plurality of regulating devices are connected with the main control circuit, so that the different levels of operation of an operator are convenient, and the circuit has a simple design, low cost and reliable performance. The design of the reference circuit ismore convenient to calibrate and operate by the operator. Due to the design of the external closed loop control circuit, the control circuit has strong anti-interference capability, good stability and high reaction speed.

The invention discloses a height limit detection method and device based on machine vision recognition, and the method comprises the following steps: adjusting the focal length of a camera of a photographing mechanism, and calibrating an image coordinate system of the camera; acquiring a vehicle image; acquiring height information of the target vehicle according to the longitudinal scale corresponding to the depth scale line of the target vehicle in the vehicle image; acquiring an image of a height limiting rod in front of the target vehicle; obtaining height information of a target height limiting rod according to a longitudinal scale corresponding to a scene depth scale line of the height limiting rod image where the target height limiting rod is located in the height limiting rod image;comparing the height information of the target height limiting rod with the height information of the target vehicle; obtaining a height difference. According to the detection method, vehicle overallheight detection and height limiting rod height detection can be realized, analysis is performed by comparing the heights of the detection vehicle and the height limiting rod, and whether the heightis ultrahigh is judged according to the analysis result.

The invention discloses a pressure sensor calibration device, and relates to the technical field of the pressure sensor. The pressure sensor calibration device comprises a base and a hydraulic outputdevice; a motor and a lead screw are arranged in the base, and a transmission gear is sleeved at the outside of one end of the lead screw; the hydraulic output device comprises a hydraulic cylinder, apiston and hydraulic oil; the piston and the hydraulic oil are located in the hydraulic cylinder, a thread groove is formed at the other end of the piston, one side of the top end of the hydraulic cylinder is fixedly connected with a mainstream pipe, one end of the mainstream pipe is fixedly connected with a T-joint, one end of the T-joint is fixedly connected with a first shunt. Through the pressure sensor calibration device disclosed by the invention, the pressure sensor is calibrated by using the hydraulic principle by arranging the hydraulic output device, the precision of the calibrationis improved; by arranging the measurement device, one the one hand, the phenomenon that the pressure sensor is damaged due to excessive pressure is avoided, on the other hand, the calibration operation is performed on the pressure sensor.

The invention relates to a multi-caliber roundness-correcting set. The multi-caliber roundness-correcting set is characterized by comprising a roundness-correcting device and a carrier roller device, wherein the roundness-correcting device comprises a base, at least one set of symmetrical roundness-correcting unit is installed on the base, a framework is installed on the roundness-correcting unit, the roundness-correcting unit mainly comprises two sets of vertical columns which are parallelly arranged, one set of vertical column of the two sets of vertical columns which are parallelly arranged is a fixed structure, the other set of vertical column of the two sets of vertical columns which are parallelly arranged is a relative-moving structure, and a guiding mechanism and a horizontal moving device are arranged between the two sets of vertical columns which are parallelly arranged. In actual operation, the multi-caliber roundness-correcting set is also convenient to operate, the locating and guiding mechanism just needs to be loosened, the horizontal moving device is started, the distance between the two sets of vertical columns which are parallelly arranged can be enlarged or shrunk, and roundness-correcting work of round pipes with different pipe diameters can further be completed; the multi-caliber roundness-correcting set also has the advantages of being simple in structure, reasonable in design, low in cost, easy to operate, safe, reliable and the like.

The invention discloses a sensor calibration device which comprises a cylindrical bottom face, a boss and a cylindrical thin-walled ring. The sensor calibration device is characterized in that the top of the cylindrical bottom face is connected with the cylindrical thin-walled ring and the boss, the boss is located inside the cylindrical thin-walled ring, bottom exhaust holes and an air inlet hole are formed in the cylindrical bottom face, and exhaust holes and an air inlet which correspond to the cylindrical bottom face are formed in the boss. The sensor calibration device has the advantages that the sensor calibration device is simple in structure, calibration operation is convenient, and the response time for calibration of gas T90 having good adsorption capacity reaches a standard value.

The invention relates to a method and a device for calibrating a current meter flow direction. The device comprises a compass, a tray, a support and a test table, wherein the test table comprises a supporting frame and a table plate; the compass is fixedly arranged in the center of the table plate; the support is connected onto the tray; and the tray is connected onto the table plate in a rotating mode. The calibration method comprises steps: (1) the current meter is placed on the current meter flow direction calibration device; (2) the level of the current meter is adjusted, and a detector is started; (3) the flow direction degree of the current meter is detected, and the reading of the current meter and the scale on the compass at the corresponding position are recorded; (4) the tray is rotated to a next position, and the calibration operation is repeated; and (5) the differences between the flow direction degrees at measurement points and scales on the compass are compared, if the average value of the differences is no smaller than +/-4 DEG, the measurement parameters of the current meter are adjusted, and the test operation is repeated until the average value of the differences is smaller than +/-4 DEG. The structure is simple and easy to carry, calibration operation at any time is facilitated, the method and the device are suitable for flow direction calibration on various current meters, the calibration process is optimized, and the current meter flow direction accuracy and the flexibility are improved.

Provided is a vehicle round-looking system calibration scene. The vehicle round-looking system calibration scene comprises first calibration blocks and second calibration blocks, wherein the first calibration blocks are symmetrically distributed on central axes of the vehicle length direction and vehicle width direction of a to-be-calibrated vehicle, a second calibration block is arranged betweeneach pair of adjacent first calibration blocks, a center point of each second calibration block and center points of two first calibration blocks arranged adjacently form a right triangle, and the center point of each second calibration block is a right angle vertex. The vehicle round-looking system calibration scene has the advantages that the construction of the scene can be completed by arranging the calibration blocks in parallel around the vehicle body, the scene is simple, and the construction is convenient; the calibration blocks are divided into two groups according to the content of picture blocks and separately arranged in a visual overlapping area and a non-overlapping area, so that a computer can analyze and judge the orientation according to a real-scene picture taken by the calibration scene, an image can be automatically spliced and verified after feature points are extracted, and the calibration operation is fast and convenient.

The invention provides a driving and braking parameter automatic calibration method, which comprises the steps of: outputting a driving/braking control sequence according to a preset time interval before a vehicle enters automatic driving, wherein the driving/braking control sequence comprises a plurality of pieces of torque data; acquiring acceleration information and speed information corresponding to each piece of the torque data; performing two-bit interpolation processing according to each piece of the torque data and the acceleration information and the speed information corresponding tothe torque data, and generating a torque characteristic table; acquiring current acceleration information and current speed information of the vehicle when the vehicle performs automatic driving; anddetermining the current torque data through looking up the torque characteristic table according to the current acceleration information and the current speed information of the vehicle. Therefore, the labor and time costs are saved, the calibration operation is simple and convenient, and the calibration personnel can start to operate the device easily.

The invention discloses a calibration support and calibration equipment thereof. The calibration support comprises an adjustable main frame and a calibration disc. The calibration disc is arranged onthe adjustable main frame, the calibration disc is provided with a projection plane for projection of laser rays emitted in the longitudinal direction of a vehicle, and calibration lines are arrangedon the projection plane. The calibration line is located in the middle of the adjustable main frame, and the extension line of the calibration line intersects with the center line of the adjustable main frame. According to the invention, the calibration operation of the calibration support is convenient, rapid and accurate.

The invention provides a dynamic tool tip position calibration method and system based on an optical locator, a medium and equipment. The method comprises the steps of constructing a structure; mounting an optical positioning device by forming a conical groove in a specific surface position of a reference block, and mounting the optical locater in a specific position; preparing for data collectionby tightly jacking the tool tip against the groove of the reference positioning block, and preparing to acquire data; acquiring attitude information by rotating a tool around the tool tip , and acquiring the attitude information of the tool and the attitude information of the reference positioning block through the optical locator; and acquiring relative attitude information by transmitting the acquired information to a conversion algorithm, transmitting the attitude information of the tool relative to the reference positioning block into a spherical fitting algorithm, and obtaining the offset coordinates of the tool tip phase under a tool coordinate system. According to the invention, the purpose of obtaining accurate tool tip offset data can be achieved, and meanwhile calibration operation becomes more convenient.

The invention provides calibration equipment and a vehicle controller calibration method and device. The calibration equipment comprises a processor; a memory electrically connected with the processorand storing a calibration instruction corresponding to a vehicle controller; a CAN transceiver electrically connected with the processor and used for sending the calibration instruction to the vehicle controller and receiving response information sent by the vehicle controller; a prompter electrically connected with the processor and used for prompting a calibration result; and a communication interface, wherein one end of the communication interface is electrically connected with the CAN transceiver, and the other end of the communication interface is connected with a vehicle. Through the calibration equipment provided by the invention, the calibration operation is relatively simple and convenient.

The invention discloses an air conditioner shell stamping structure convenient to move. The structure comprises a lower stamping die body and an upper stamping die body mounted above the lower stamping die body. Two parallel sets of forklift fork pockets are formed in the bottom of the lower stamping die body; long-strip-shaped accommodating grooves communicating with the forklift fork pockets are formed in the bottoms of the forklift fork pockets correspondingly; a partition plate flush with the inner wall of the bottom of each forklift fork pocket is mounted at an opening of the corresponding accommodating groove; through holes are formed in each partition plate in an array mode; a mounting plate is mounted in each accommodating groove and is in sliding connection with the side wall of the accommodating groove; connecting rods are vertically mounted on the side, close to the opening of the corresponding accommodating groove, of each mounting plate; and one ends of the connecting rods are connected with the mounting plates, and movable plates are perpendicularly mounted at the other ends of the connecting rods. According to the air conditioner shell stamping structure, the mode that when a traditional stamping die is mounted, knocking is adopted for calibration is changed, the moving difficulty during calibration of the stamping die is reduced, calibration operation of the stamping die is facilitated, and the mounting efficiency of the stamping die is improved.

The invention discloses a rectangular waveguide evanescent mode based electromagnetic field probe spatial resolution calibration device. The device includes a rectangular waveguide connected to a matching load; the rectangular waveguide has a width a, a height b and a length l, wherein a <= 0.4c/f<max>, b < a, l > 8[lambda]c10, the c is the light velocity in vacuums, f<max> is the highest calibration frequency, and [lambda]c10 is the cut-off wavelength of a dominant mode TE10 mode of the rectangular waveguide; the half position on the upper broad wall of the rectangular waveguide is provided with a slit so as to form a calibration area; a probe can be completely stretched into the slit and move in the slit through the configuration of the width w of the slit and the height b of the rectangular waveguide; and the disturbance of the slit on a waveguide internal field structure can be in the allowed range of calibration precision through the configuration of the width w of the slit. The device is flexible and plastic in design and wide in calibration band, and can obtain large electromagnetic field gradients, so that the device is convenient in calibration operation and high in calibration precision.

The invention relates to the technical field of tester calibration, and particularly relates to a multi-port wireless communication tester calibration method. The invention adopts the technical schemethat the multi-port wireless communication tester calibration method is characterized by comprising a signal transmitting function calibration step and a signal receiving function calibration step, wherein the signal transmitting function calibration step consists of a Tx/DLRF OUT output port calibration step and a MPA RFIO Port 0-7 output port calibration step; and the signal receiving functioncalibration step consists of an Rx/UL RF IN input port calibration step and a MPA RFIO Port 0-7 input port calibration step. The multi-port wireless communication tester calibration method has the advantages that a multi-port wireless communication tester calibration result can be guaranteed to be more reliable; in the calibrating process, efficiency is higher; and the multi-port wireless communication tester calibration method is more convenient in the process of carrying out the calibration operation.

The invention relates to the field of pH meters, in particular to an intelligent monitoring pH meter which comprises a pH meter body, a cleaning cylinder and cleaning assemblies. The cleaning cylinder sleeves the outer side of a measuring electrode; a supporting plate a is arranged on the peripheral wall of the cleaning cylinder, and a pull ring is arranged on the supporting plate a; a hook is arranged at the bottom of the pull rope a and hung on the pull ring, and the top of the pull rope a is wound on the supporting rod a; a supporting rod a is rotationally arranged between the two sets of fixing blocks, a limiting ring a is arranged on the supporting rod a, and the supporting rod a is sleeved with a torsional spring; a piston is arranged in the box body and provided with a supporting rod b; the supporting rod b is sleeved with the spring; the sliding block is slidably arranged on the outer wall of the box body; one end of the pull rope b is connected with the bottom of the supporting plate c, and the other end of the pull rope b is wound on the supporting rod a; the inner cavity of the box body communicates with the inner cavity of the cleaning cylinder through a hose. There are two cleaning assemblies. According to the invention, the calibration operation is convenient and fast, the measuring electrode cleaning operation is simple, and the cleaning effect is good.