33results about How to "Meet the calibration needs" patented technology

The invention discloses a robot TCP calibration method based on vertical reflection, which combines a binocular vision system, a robot and an operation tool, uses a plane mirror as an auxiliary tool, and utilizes the relationship between robot kinematics and space coordinate transformation to perform calibration on a fixed point in space. Multiple measurements are taken to establish the hand-eye relationship, and the circular target point at the end of the working tool is detected. Through the coordinate transformation relationship and the characteristics of the imaging symmetry of the plane mirror, the calibration of the TCP is completed. The TCP calibration method of the invention completes the fast and accurate calibration of TCP.

The invention provides a mineral standard sample for nanometer CT, its preparation method and application. The method of the mineral standard sample comprises the following steps: selecting standard mineral particles according to the mineral composition of the rock to be tested; processing the selected at least one standard mineral particle into a mineral sample disc; welding one of the mineral sample discs on the base Each mineral sample disc is stacked and welded, and the columnar sample formed is the mineral standard sample. When the above-mentioned mineral standard samples are used for mineral analysis, the gray scale information of the standard mineral samples and rock samples is used for mineral identification, so that the unknown mineral particles in the rock samples can be identified and calibrated, and then the three-dimensional information of the corresponding mineral components in the rock samples can be obtained. distribution, volume ratio occupied, and mineral particle size distribution. The method provided by the invention effectively fills the vacancy of such standard sample preparation methods, and meets the urgent demand for microscopic three-dimensional mineral analysis in the field of petroleum geology.

The invention discloses a portable fast pulse generating device and a manufacturing method thereof, comprising: a high-frequency PCB circuit board, a main loop structure, a secondary loop structure, a power supply and a load; both the primary loop structure and the secondary loop structure are built on a high-frequency PCB circuit board; the main circuit structure includes the main capacitor C 1 , mercury switch and filter module; all components of the main circuit structure are in a straight line; the secondary circuit structure includes a high-voltage DC voltage source and a charging resistor R 1 ; High voltage DC voltage source and charging resistor R 1 Used to form the main capacitor C 1 The charging circuit; the power supply is used for the power supply of the high-voltage DC voltage source; the power supply is also used for the triggering of the mercury switch; the load is connected to the high-frequency PCB circuit board through the SMA plug and the SMA socket. The invention miniaturizes the signal source used to generate the electromagnetic wave for calibration, and can meet the calibration requirement of the ultra-high frequency sensor for partial discharge measurement under actual working conditions on site.

The invention provides a distortion testing device for an f-theta optical system. The testing device comprises a turntable, a guide rail, a target generator and an image analyzer in sequential arrangement, wherein the guide rail is arranged on the turntable, the target generator is arranged at the object space of a calibrated optical system, and the image analyzer is arranged at the image space of the calibrated optical system. The distortion calibration device and a distortion calibration method for the f-theta optical system have the advantage that the providing of targets in different object distances can be simultaneously realized.

The present invention relates to an on-orbit calibration method for a flow sensor of a satellite cold air propulsion system, S1, preheating the flow sensor and pressure sensor in the satellite cold air propulsion system and turning on the temperature control of the propulsion system; S2, according to the propulsion The output of the flow sensor under the condition of no flow in the system determines the zero position of the flow sensor and completes the zero calibration; S3. Use the attitude control thruster in the satellite cold air propulsion system to send jet pulses, generate standard pressure wave signals, and collect the flow sensor The actual output flow wave signal; S4. According to the standard pressure wave signal, the theoretical flow value of the flow sensor is calculated by inversion; S5. Taking the calculated theoretical flow value as a reference, comparing the actual output value of the flow sensor, the flow sensor Carry out calibration to obtain the conversion coefficient calibration value, and use the conversion coefficient calibration value to complete the on-orbit calibration of the flow sensor.

The invention discloses a system calibration method for a three-dimensional line of sight tracking system. The method changes the position of the calibration sphere, photographs multiple groups of calibration spheres and bright spot images at different positions, and constructs multiple These planes intersect the line connecting the light source and the optical center of the system camera, thereby obtaining the straight line where the light source is located, setting multiple possible light source points on the straight line where the light source is located, and bringing them into the 3D line-of-sight tracking system for optimization Solve the problem, converge the possible light source points to the real light source point, obtain the three-dimensional space coordinates of the real light source, and calibrate the screen in the same way. The method of the invention fully considers the influence of various error factors, can solve the problem that the light source and the screen are not within the field of view of the system camera, and is especially suitable for the near-eye line of sight tracking system. It has the advantages of high calibration accuracy and convenient operation, and can better meet Calibration requirements for 3D gaze tracking system.

A calibration device and calibration method for a heat flow sensor, the calibration device includes a cold plate and a hot plate capable of precise temperature control, the calibrated heat flow sensor and a standard heat flow sensor are placed between the cold and hot plates, and the sensor is calibrated by means of heat conduction calibration. The output of the standard sensor and the sensor under test is collected and calculated by a formula to obtain the sensitivity of the sensor under test. The invention can reduce the error introduced by the blackness coefficient of the black coating layer; avoid the error introduced by the response time difference; the calibration range is wide, and can meet the calibration requirements of heat flux density in different ranges; the equipment is simple, easy to implement, and the calibration cost is low; Calibrate multiple products at the same time to increase calibration efficiency.

The invention discloses a robot TCP calibration system based on vertical reflection, which uses a binocular vision system, a robot and a working tool to work together, uses a plane mirror as an auxiliary tool, and utilizes the relationship between robot kinematics and space coordinate transformation to perform calibration on a fixed point in space. Multiple measurements are taken to establish the hand-eye relationship, and the circular target point at the end of the working tool is detected. Through the coordinate transformation relationship and the characteristics of the imaging symmetry of the plane mirror, the calibration of the TCP is completed. The TCP calibration system of the present invention is different from the contact calibration system, has no risk of collision, and has a high safety factor.

The embodiment of the present application provides a multi-sensor joint calibration method, device, electronic equipment and storage medium. In the method, the calibration device is set as two coaxial and non-parallel first calibration plates and second calibration plates, and then through two The connection relationship between the calibration boards, the joint calibration of different types of sensors can separate the observations of different sensors into two boards, and the two boards can use different materials or patterns, etc. The observation error caused by the different requirements of the sensor for the calibration plane, and the two calibration boards can be made smaller, it is easy to ensure that the board surface remains flat for a long time, and the fixed angle of the two separate calibration boards requires lower processing accuracy. , easy to implement at low cost. Therefore, the calibration device in this application is more likely to meet the calibration requirements.

The invention provides a calibration device for GIS / GIL partial discharge diagnosis, and the calibration device includes an electromagnet, a metal ball, a support and a control circuit. The electromagnet is arranged in the support, a through hole is arranged in the support, and the metal ball is arranged in the through hole. The control circuit is connected with the electromagnet and controls theelectromagnet to act, and the metal ball reciprocates under the driving of the electromagnet. The invention also provides a calibration method for GIS / GIL partial discharge diagnosis. The calibrationdevice and method provided by the invention can generate ultrasonic signals for calibration with good consistency, is simple in structure and convenient to use, and can meet the calibration requirements of an acoustic emission sensor for partial discharge diagnosis.