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

The invention discloses an aligning correction device and method for space navigation detector ground calibration. Accuracy aligning of an X radiation source and a detector can be achieved through the device, and the parallel aligning error is less than 0.02 degree and the central aligning error is less than 1mm. The device comprises a front-vehicle optical measuring platform and a rear-vehicle optical measuring platform. A detector is fixedly installed on the front-vehicle optical measuring platform. An X radiation source is fixedly installed on the rear-vehicle optical measuring platform. The front-vehicle and rear-vehicle optical measuring platforms are located at front and rear ends of a vacuum beam line channel respectively. Firstly, parallelism aligning is carried out, the posture of the front-vehicle or rear-vehicle optical measuring platform is adjusted, and thus an image of a laser light spot is located at an imaging center of a parallelism measuring CCD camera; then height and horizontal displacement aligning is carried out, the posture of the front-vehicle or rear-vehicle optical measuring platform is adjusted, thus the image of the laser light spot is located at the imaging center of the displacement measuring CCD camera, and finally aligning of the X radiation source and the detector is achieved.

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 invention relates to an in-orbit calibration method for a satellite cold air propulsion system flow sensor. The in-orbit calibration method comprises the following steps: S1, electrifying and preheating the flow sensor and a pressure sensor in the satellite cold air propulsion system and starting the temperature control of the propulsion system; S2, determining the zero position of the flow sensor according to the output of the flow sensor under the no-flow working condition of the propulsion system, and completing zero position calibration; S3, using an attitude control thruster in the satellite cold air propulsion system for sending air injection pulses, generating a standard pressure wave signal, and collecting a flow wave signal actually outputted by a flow sensor; S4, calculatinga theoretical flow value of the flow sensor through inversion according to the standard pressure wave signal; and S5, taking the calculated theoretical flow value as a reference, comparing the actualoutput value of the flow sensor, calibrating the flow sensor to obtain a conversion coefficient calibration value, and completing on-orbit calibration of the flow sensor by utilizing the conversion coefficient calibration value.

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.

The invention discloses a calibration device and calibration method of a water-bathing method crack growth signal. The calibration device is applied to calibrating a crack growth signal of a crack monitoring instruction based on a DC potential fall method. The calibration method comprises the following steps: importing constant current at two ends of a metal conductor, collecting a voltage difference signal of the metal conductor under twice temperature, and calibrating the voltage difference signal as the crack growth signal with of the corresponding crack growth length according to a conclusion that the voltage difference signal can be used as an analog crack growth signal about 1mm crack growth of a 304 steel sample when the temperature of the metal conductor is 1 DEG C increased. The localization progress of the related instrument is accelerated, an efficient, simple and fast calibration device and method are provided for verifying the function and precision of the instrument, a relation between the 304 steel crack length and the measurement voltage signal is published, the applicable range of the instrument can be popularized in an acceleration way, and the calibration devicehas the advantages of being simple in structure, stable in performance, repeated in use and intelligent in control.

The invention discloses a robot TCP calibration system based on vertical reflection. A binocular vision system, a robot and an operation tool are combined for operation, a plane mirror serves as an auxiliary tool, the robot kinematics and space coordinate conversion relation is utilized for conducting repeated measurement on space fixed points, the hand and eye relation is determined, the tail endcircular target point of the operation tool is detected, and through the coordinate conversion relation and the plane mirror imaging symmetry characteristic, TCP calibration is finished. According tothe TCP calibration system, the system is different from a contact type calibration system, collision risks do not exist, and the safety coefficient is high.

The embodiment of the invention discloses multi-view camera calibration equipment, a calibration method and a storage medium. The equipment comprises: a calibration board; a moving module which is arranged below the calibration plate and is used for switching the spatial position state of the calibration plate in the shooting range of the plurality of cameras; a control module which is connected with the moving module and the cameras and used for switching the spatial position state of the calibration plate through the moving module and controlling the cameras to shoot the calibration plate when the moving module completes switching of the spatial position state of the calibration plate, so that calibration images of the complete calibration plate in the corresponding spatial position states are shot by at least two cameras at the same time until the number of the calibration images shot by every two cameras at the same time reaches the target number; determining calibration results of the corresponding every two cameras according to the calibration images shot by the every two cameras; and completing calibration of all cameras is completed. The problem that an existing multi-view camera calibration method is low in calibration image obtaining efficiency is solved.

The invention discloses a device for calibrating crack expansion signals in a water bath method. The device comprises a base, a metal conductor, a fan, a vacuum flask and a temperature control devicewhich is capable of setting and displaying the temperature of water in the vacuum flask and giving an alarm when the temperature of the water exceeds the set temperature, the vacuum flask comprises aflask body and a flask cap positioned on the upper portion of the flask body, a temperature sensor used for measuring the water temperature of the flask body and a heating resistance wire used for heating water in the flask body are arranged on the inner wall of the flask body, and the temperature sensor, the heating resistance wire and the fan are all connected with the temperature control deviceand are controlled to work by the temperature control device. According to the device for calibrating crack expansion signals in a water bath method in the invention, the localization process of related instruments is accelerated, an efficient, simple and rapid calibration device is provided for verifying the functions and precision of the crack monitoring instrument, the relation between the length of the 304 steel crack and the measurement voltage signal is disclosed, accelerated promotion of the application range of the instrument is facilitated, and the advantages of being simple in structure, stable in performance, capable of being repeatedly used and intelligently controlled, and the like are achieved.

The invention relates to a method for detecting the content of hydrogen in solid metal. The method mainly comprises the following steps: putting the solid metal into a hydrogen evolution chamber; vacuumizing the hydrogen evolution chamber, introducing a carrier gas into the hydrogen evolution chamber to replace the hydrogen evolution chamber with a carrier gas atmosphere, and continuously introducing the carrier gas at a certain flow rate; heating the hydrogen evolution chamber to separate out hydrogen from the solid metal, and continuously obtaining the real-time hydrogen concentration in thehydrogen evolution chamber through a high-temperature hydrogen sensor in the hydrogen evolution chamber; and according to the real-time hydrogen concentration and the flowing speed of the carrier gas, carrying out integral treatment within the hydrogen evolution time to obtain the hydrogen content in the solid metal. According to the hydrogen measuring method, online detection of the hydrogen content is conducted while hydrogen is separated out of the solid metal sample, secondary collection of hydrogen is not needed, and compared with a traditional hydrogen measuring method, the method is more beneficial for improving the hydrogen content detection speed and the precision of detection data.