5results about How to "High precision measurement" patented technology

The present application provides a sensor capable of high-precision measurement with high SN ratio even when the ambient temperature changes, and a bandpass filter for the sensor. The sensor has a light source, a bandpass filter that extracts light of a peak wavelength of the light source, and a light-receiving element that receives the light extracted by the bandpass filter. The bandpass filter has a bandpass layer and a support that supports the bandpass layer. When the thermal expansion coefficient of the bandpass layer is α1, the elastic modulus is E1, the thermal expansion coefficient of the support is α2, and the elastic modulus is E2, α1 > α2 and E1 < E2 are satisfied.

A kind of six-freedom absolute deformation measurement method of measuring platform based on single reference point measurement platform, with measuring platform as center, in the measured area, and with measuring platform as the other side of symmetry, reference point is arranged, laser displacement measuring instrument, camera and target are arranged on reference point;Camera is used to collect measuring platform target image on measuring platform;Target on reference point is used as feature recognition point;Two-dimensional inclination measuring instrument is arranged on measuring platform, measuring platform camera and measuring platform target;Measuring platform target is used for collecting image data by camera of reference point;The present application realizes real-time solution to six-freedom (three-dimensional translation+three-dimensional rotation) displacement of measuring platform by single reference point feature identification and measuring platform feature identification, to realize high-precision measurement to position change of measuring platform itself, so that measurement result is more accurate.

The application discloses a detection device and an electronic device. The detection device comprises: a driving unit driving a transmitting unit to transmit first and second modulated light beams; an iTOF unit receiving a first echo light signal of the first modulated light beam; a dTOF unit receiving a second echo light signal of the second modulated light beam; and a processing unit generating a detection strategy based on a first depth map generated by the first echo light signal: when the detection distance of the depth map is less than a first threshold, the driving unit drives the transmitting unit to continue transmitting the first modulated light beam to enable the iTOF unit to realize iTOF imaging; and when the detection distance is greater than or equal to the threshold, the driving unit drives the transmitting unit to transmit the second modulated light beam to enable the dTOF to realize dTOF imaging. The scheme determines the detection strategy through the corresponding detection result of the iTOF unit, ensures that the detection device realizes high-precision measurement in the full detection distance range, reduces energy consumption, and improves the near-distance high-reflection expansion of dTOF imaging.

This invention relates to a focal plane consistency coefficient testing device for a fluorescence endoscopy system. It includes a fixed plate, a worktable mounted on the fixed plate, and a transmission light box. An endoscope with a camera is mounted on the worktable via a connector. The camera is secured to the endoscope with a clip. A focusing knob is provided on the camera for adjusting image sharpness. The endoscope is positioned directly opposite the transmission light box, and a test card is mounted above the transmission light box. This invention provides a focal plane consistency coefficient testing device for a fluorescence endoscopy system, which boasts advantages such as simple and reasonable structure, practicality, and convenience.

A kind of hydraulic support high-precision moving frame alignment positioning control method, (1) the adjacent two hydraulic supports are contacted each other, and the position of the hydraulic support is always constrained by its adjacent frame during moving frame;(2) displacement sensor is arranged in the base of hydraulic support;(3) first, the relative displacement between hydraulic supports is used as the basis to calculate the position information of each hydraulic support compared with the first frame, and the actual arrangement trajectory of hydraulic support is obtained;Then, the ideal trajectory of next moving frame and the moving distance of each hydraulic support needed to compensate straightness are calculated with the position of the most lagged hydraulic support as reference, finally, the moving distance of each hydraulic support should be calculated and moving frame action is completed in combination with the moving frame step distance set in advance, and the dynamic alignment of hydraulic support is realized during moving frame process.The present application makes the adjacent two supports keep direct contact, and controls the alignment and positioning of hydraulic support, avoids the problem of inconsistent moving frame direction angle caused by independent hydraulic supports.