43results about How to "Small measuring range" patented technology

A method by which the height of an electronic component sucked and held by a nozzle can be detected with high accuracy and high efficiency is a component height measurement method applied to a mounter (100) equipped with a transfer head (8) having a component-sucking-and-holding nozzle (21), for transferring a component P and mounting the component P onto a board (3), and includes: lowering the component P to within the high-accuracy range of a first line sensor (13) for measuring the height of the component P; and measuring the height of the component P using the first line sensor (13).

A multiple degrees of freedom motion system comprising an arrangement of rigid stages, flexure constraint modules, actuators, and sensors. These components of the motion system are arranged and connected in a systematic fashion to provide a high degree of decoupling between the motion axes, suitable placement of ground-mounted actuators to actuate each motion axis, and suitable placement of sensors to allow end-point measurement along each motion axis. This arrangement of rigid stages, flexure constraint modules, actuators and sensors enables large motion range and high motion quality in the motion system, while using standard and commonly available components.

The invention belongs to the field of intelligent composite additive and subtractive material manufacturing, and discloses an online layer-by-layer detection additive and subtractive material composite manufacturing method, which includes: 1) establishing a three-dimensional model of the part to be formed and converting it into an STL model, and performing the STL model Carry out slicing, and obtain the theoretical morphology data of each layer, preset the additive processing path and subtractive processing path of each layer; 2) form multiple cladding paths according to the additive processing path of the current layer, and multiple The cladding road constitutes the current cladding layer, and the cladding road section morphology information is collected in real time while the cladding is forming, and the data is processed to obtain the current cladding layer morphology to assist in planning the path of adding and subtracting materials; 3) Repeat step 2) The cladding forming of each layer is completed to complete the manufacture of the entire part. The invention solves the problems of separation of manufacturing and measurement, lack of real-time feedback, and deviation in the manufacturing process in the past, improves manufacturing efficiency and manufacturing accuracy, and is suitable for layer-by-layer forming additive manufacturing.

The invention discloses a dual-visual-angle light path device used for a wind tunnel with a smooth tunnel wall. The dual-visual-angle light path device comprises a side-view light path unit and a look-up light path unit, wherein the side-view light path unit is arranged at a side observation window of the testing segment of the wind tunnel with the smooth tunnel wall and used for producing a side-view light path so that the side-view light path can be over against a model placed in the wind tunnel with the smooth tunnel wall for imaging; the look-up light path unit is arranged in a lower plenum chamber of the testing segment of the wind tunnel with the smooth tunnel wall and used for producing a look-up light path so that the position under the model placed in the wind tunnel with the smooth tunnel wall can be imaged. According to the technical scheme, the limit by space and installation conditions is overcome, the technical problems that multiple existing high-speed cameras cannot be installed on a wind tunnel, and a camera shooting light patch cannot be arranged are solved, and a technical means is provided for multi-visual-angle camera shooting and measurement technology in a model placement test.

The method includes: a first profile generation step of generating a first profile of irregularities in a measurement range set on the substrate sheet (2), based on first measurement information acquired at a location upstream of the coating machine (30) and indicating a shape of irregularities of the substrate sheet (2); a second profile generation step of generating a second profile of irregularities in the measurement range, based on second measurement information acquired at a location downstream of the coating machine (30) and indicating the shape of the irregularities of the substrate sheet (2); and a coating amount calculation step of calculating the amount of the applied coating from a difference between the first measurement information and the second measurement information, based on a positional relationship in which the shape of the first profile of irregularities and the shape of the second profile of irregularities are matched to each other.

The invention belongs to the technical field of optical fiber sensing, and in particular relates to a cavity length-multiple-frequency correlation demodulation method of an optical fiber F-P sensor. The present invention aims to solve the problem of fuzzy judgment due to the small difference between the peak values ​​of the traditional cross-correlation function. The cross-correlation operation is performed on the spectral signal and the single-octave template function to obtain multiple discrete peaks, and then the cross-correlation operation is performed on the reflected spectral signal and the multi-octave template function to extract the envelope of the multi-octave cross-correlation curve, and the envelope The trough position of the curve is used as a reference, compared with multiple discrete peaks obtained by single-octave correlation, and the single-octave signal peak closest to the trough position of the envelope curve is taken as the cavity length value of the corresponding fiber optic sensor. The invention effectively improves the demodulation precision of the optical fiber FAP sensor.