12 results about "Contact mode" patented technology

The invention discloses a thoracic cavity heart sound signal non-contact extraction system and method based on structured light. The system comprises a structured light projection module, an image acquisition module, an image processing and displacement extraction module and a signal processing and trigger point identification module, structured light is projected on the surface of the chest of a human body to form a regular pattern, and a high-speed image acquisition means is utilized to record micro displacement change generated by light spots under cardiac drive. Thoracic cavity vibration information is extracted through an image processing technology, periodic feature points corresponding to a cardiac rhythm are recognized in combination with a time sequence analysis strategy, a thoracic cavity heart sound signal is extracted, rhythm analysis is conducted, and a cardiac trigger point is output to serve as a trigger signal for synchronous control of medical equipment. The technical problems of signal distortion, equipment interference, potential safety hazards, inconvenience in use and the like in a strong electromagnetic environment in a traditional contact mode are solved, and a high-precision synchronous trigger signal is provided for dynamic imaging.

The invention belongs to the technical field of nanometer measurement and control, provides a multi-mode cooperative force control method for contact mode scanning of an atomic force microscope, and aims to extract contact state information in real time by carrying out drift and aberration compensation on a measurement signal so as to realize multi-mode cooperative force control. Combined self-adaptive setting of control parameters is carried out in combination with sample morphology characteristics and error signal statistical characteristics, and undisturbed switching between a steady state controller and a transient state controller is realized, so that stable, rapid and low-noise force tracking control is realized in samples with different rigidities and changing noise environments. And the stability and the imaging quality of AFM contact mode scanning are obviously improved. According to the invention, adaptive force control on samples with different rigidities and complex shapes is realized, and the scanning stability and imaging quality of the contact mode atomic force microscope are remarkably improved.

The invention provides a non-contact flexible joint verticality measurement method and system, and the method comprises the steps: transmitting a collected workpiece image to an image processing unit, and carrying out the processing of image features through a machine vision technology, so as to obtain the edge contour information of a flexible joint; the method comprises the following steps: fitting an edge contour straight line to obtain the coordinates of image feature points collected each time, calculating the longitudinal spacing of the feature points in the image to obtain the maximum spacing, calculating the actual distance of each pixel through pixel equivalent calibration, and converting the pixel distance into a real physical distance to obtain the verticality of the flexible joint. The whole detection process is automatically completed under the control of a computer. The perpendicularity measuring system has the advantages of being non-contact, high in precision, high in efficiency, high in automation degree and the like, and is suitable for rapid detection of perpendicularity of objects with various complex shapes; the system has the advantages of being easy to integrate, high in expandability and the like, is suitable for perpendicularity detection of flexible joints which cannot be measured in a contact mode, and has wide application prospects.

The application discloses a kind of based on two-dimensional material's repeatable read-write method, belong to information storage technical field, this method includes that raw material is prepared into microcosmic flat two-dimensional material;The friction of two-dimensional material is characterized by the contact mode of atomic force microscope, obtain the initial friction of nanometer blackboard and scanning area;The surface contact mass of nanometer blackboard is changed under the condition that the topography of two-dimensional material is not changed by the knocking mode of atomic force microscope, realize pattern engraving, and obtain the nanometer blackboard after engraving;The engraved nanometer blackboard is scanned using the contact mode of atomic force microscope, realize pattern reading;The friction of scanning area is restored to initial friction by the lateral force mode of atomic force microscope, realize repeatable read-write.The application realizes the repeatable read-write engraving of two-dimensional material, and shows binary pattern or specific image information entry, reading and erasing on two-dimensional material, and the storage density on graphene reaches 1600GB / m 2 .

The application relates to the technical field of bridge structure health monitoring, and relates to a bridge deformation monitoring system combining contact and non-contact modes, which comprises the following: an intelligent fusion target unit fixed to a monitoring point of a bridge, which is used for providing an optical mark and synchronously collecting state data of the intelligent fusion target unit; a non-contact visual collection unit arranged on a stable reference point outside the bridge, which is used for periodically collecting an optical mark image of the intelligent fusion target unit and generating image data; and a data processing unit connected with the communication modules of the non-contact visual collection unit and the intelligent fusion target unit respectively, which is used for receiving the image data and the state data, and correcting and processing the image data based on the state data to generate a monitoring result of bridge deformation.

According to the scanning probe microscope, a light beam emitted by a light source passes through a light modulator and enters a probe arm of a probe, a signal output by the scanning probe microscope at least responds to a reference signal and a signal output by a detector, and when the scanning probe microscope operates in a contact mode, the reference signal is transmitted to the light modulator; and causing the state of the optical modulator to at least respond to the reference signal; the signal of the surface characteristic of the detected object can be transferred to the frequency corresponding to the reference signal, and the reference signal is combined to filter the signal output by the sensitive detector, so that the signal-to-noise ratio is greatly improved. The utility model also provides a scanning probe microscope.

When the position of the wiper with respect to the outer peripheral surface of the transport belt changes, there is a possibility that the contact mode of the wiper with respect to the outer peripheral surface of the transport belt changes.SOLUTION: The transport device 2 includes the transporting belt 33 having the outer peripheral surface 33a that supports the media P and capable of transporting the media P, and the wiper 91 capable of wiping the outer peripheral surface 33a. The base portion 93 extends in the A-axis direction toward the 33a portion of the outer peripheral surface, the protruding portion 94 protrudes from the base portion 93 in the B-axis direction intersecting the A-axis direction when viewed from the direction along the X-axis direction, the tip of the protruding portion 94 has a curved surface shape, and the tip of the protruding portion 94 comes into contact with the 33a portion of the outer peripheral surface, whereby the 33a portion of the outer peripheral surface is wiped.SELECTED DRAWING: Figure 4A

The invention discloses a non-contact automatic control method and device based on an ultrasonic phased array. The method comprises the following steps: acquiring a control image and respective initial positions of a plurality of control objects; determining three-dimensional coordinate information of each stop position in the control image; for each control object, receiving a movement control instruction of the target object to the control object, and in the process that the control object moves from the initial position to the target stop position pixel by pixel according to the movement path, controlling the target object to move; determining optimal phase configuration parameters of a plurality of ultrasonic transducers in the ultrasonic phased array when the control object is located at each path pixel point by taking the lowest negative gradient of acoustic radiation force received by the control object in the corresponding acoustic field of the ultrasonic phased array when the control object is located at each path pixel point as a target; and each ultrasonic transducer is controlled to transmit an ultrasonic signal according to the optimal phase configuration parameter. The technical problems of high damage risk, low degree of freedom of operation and low control precision when a tiny or sensitive object is controlled in a contact mode are solved.

The invention relates to an inductance magnetic core loss detection method and system, and the method comprises the steps: irradiating an inductance magnetic core through incident rays, and receiving reflected rays reflected by the inductance magnetic core; generating a reflected ray image based on the reflected ray; the real-time total loss of the inductance magnetic core is evaluated based on the reflected ray image, the original structure and integrity of the magnetic core do not need to be damaged through a non-contact mode of incident ray irradiation and reflected ray imaging, the magnetic core does not need to be disassembled and cut in the detection process, the magnetic core can be directly reinstalled to a circuit to be continuously used after detection is completed, the detection cost is greatly reduced, and the detection efficiency is improved. The problems that in an existing ray diffraction method and an electron microscope scanning method, the inductance magnetic core needs to be sliced or ground into powder, so that the detected magnetic core cannot be put into actual use continuously, the detection cost is increased, and nondestructive performance evaluation of the in-service inductance magnetic core is difficult to achieve can be solved.

The invention provides a tool for assisting an ophthalmology slit-lamp microscope to measure the depth of the anterior chamber in a non-contact mode, the tool comprises a fixing frame and a ruler provided with standard scales, the fixing frame is provided with a reference clamping plate vertically corresponding to the standard scales, and the ruler can be independently installed on an operation board. The scale and the fixing frame are of a split structure, the scale is installed on the operation board, and the operation board and the scale synchronously move front and back. During use, the operation board and the scale are pushed to focus on the inner surface of a cornea, the starting scale of the scale is recorded, then the operation board and the scale are pushed to focus on the front surface of a crystal, and the end scale of the scale is recorded. Therefore, the depth of the central anterior chamber can be obtained only by calculating the difference value of the two scales. The tool is simple in structure and convenient to use, and can quickly and accurately measure the anterior chamber depth of a patient in a non-contact manner.

The present application relates to a kind of mobile laser ultrasonic testing devices for large industrial facilities defect detection, with laser ultrasonic non-contact detection advantage, and can be stably supported in high operating environment in the surface of detection object, reduce shaking, improve detection accuracy and reliability.The device includes mobile base with wheels, liftable setting in the lifting support body of mobile base, setting in the front support body of its front, from the pair of support rods that protrude from front support body, and laser ultrasonic detector setting on front support body.Support rod front end contact and support the surface of detection object, detector generates ultrasonic wave by laser, to detect internal defect in non-contact mode, realize safe, efficient and stable field detection.

The invention relates to a driver controller contact gap measurement method and device and electronic equipment. The method comprises the following steps: calling a monocular camera to collect a to-be-measured driver controller contact image; correcting the to-be-measured driver controller contact image based on the camera internal parameters and the camera distortion parameters of the monocular camera to obtain the corrected to-be-measured driver controller contact image; the corrected driver controller contact image to be measured is processed through a region-of-interest weighted fusion algorithm, and a movable contact outer frame region and a static contact outer frame region are obtained; determining the pixel size of a contact gap based on the movable contact outer frame area and the static contact outer frame area; and obtaining a conversion matrix matched with the monocular camera, and determining the gap size of the driver controller contact to be measured based on the conversion matrix and the pixel size of the contact gap. Gap measurement of the contacts of the driver controller to be measured is completed in a non-contact mode through image acquisition, contact with the contacts is avoided, and improper contact is avoided, so that the contact gap measurement of the driver controller can be performed more accurately, safely and efficiently.