47results about How to "Increase positioning resolution" patented technology

In a method for the continuous real time tracking of the position of at least one mobile object in a defined multidimensional space, at least one mobile transmitter module is attached to at least one mobile object and the signals from the at least one module are received by a stationary receiving and signal processing network and then centrally processed. The signals emitted by each transmitter module are electromagnetic waves sent within a frequency band range using time division multiplexing techniques. Due to the fact that the frequency band is used as a single channel for the purpose of maximizing the accuracy with which a position is detected, and due also to the fact that the communication process between the transmitters and the receivers is based on the principle of pseudo-random time division multiplexing using burst transmissions of low cross correlation with non synchronized pseudo-random patterns, there is created a method for the continuous tracking of the position of one or more mobile objects at any time and in any place which is of very high positional resolution and has a temporal resolution of just a few milliseconds.

The invention relates to a piezoelectrically-driven inchworm-type positioning workbench based on a flexible amplification principle. The piezoelectrically-driven inchworm-type positioning workbench comprises a guide adjustment mechanism and an inchworm-type moving platform. The guide adjustment mechanism guides the positioning workbench via cross roller guide ways, and the inchworm-type moving platform is guaranteed to move normally along the guide ways through a datum retaining plate, an adjustment retaining plate and adjusting screws. Clamping portions of a flexible mechanism in the inchworm-type moving platform are of a symmetrical level amplification mechanism, and an intermediate driving portion is of a composite bridge structure. Extension and shortening of three piezoelectric ceramics on the inchworm-type moving platform are controlled by a time sequence to complete linear travelling movements of the workbench. The inchworm-type positioning workbench has the advantages of large travel, high resolution, high bearing capacity, high moving speed, good directionality and the like.

In a DOI radiation detector, scintillation crystals are arranged in three dimensions on a light receiving surface of a light receiving element, and a response of a crystal having detected a radiation ray can be identified on the light receiving surface. Thereby, a position at which the radiation ray is detected is determined in three dimensions. In this DOI radiation detector, regular triangular prism scintillation crystals are used, and response positions of the respective crystals are shifted for each set. This allows crystal identification without loss even with a structure such as a three-layer or six-layer structure hard to achieve by a quadrangular prism scintillation crystal.

A tomography device, particularly for single photon emission computed tomography (SPECT), comprises a multi-pinhole collimator and a detector for detecting gamma quanta or photons that penetrate the multi-pinhole collimator. In a tomographic method using the device, the distance between the object and the multi-pinhole collimator is selected to be smaller than the distance between the multi-pinhole collimator and the surface of the detector.

The invention relates to a microseism interference imaging method. The method includes the steps of dispersing an underground model through meshes of a certain size, arranging n detectors in the underground model, establishing an underground speed model, calculating the travel time between each mesh point and the preliminary wave of each detector according to the speed model, obtaining first record information of a main event of a microseism in the n detectors and second record information of a target event in the n detectors, conducting mutual correlation calculation on the main event and the target event of the microseism according to the first record information and the second record information, obtaining an envelope and a mutual correlation envelope gather, setting different trigger moment values at each mesh point according to the specific time step, conducting time-window-added interference imaging on the mutual correlation gather, conducting section processing on a processed image, obtaining the maximum values in different section images, comparing the maximum values of different section images, and obtaining the target maximum value.

The invention discloses a transmission line and network fault positioning method based on transfer function correlation of electromagnetic time reversal, and the method comprises the steps: 1) settinga single observation point at any terminal in a transmission line and a network, measuring and recording a fault high-frequency transient signal in a limited duration, and obtaining a measurement signal; 2) establishing a transmission line simulation model in the step 1), and obtaining fault transient signals generated at different positions through simulation, namely obtaining simulation signals; 3) carrying out time synchronization operation at the starting moment on the simulation signal obtained in the step 2) and the measurement signal obtained in the step 1) by utilizing a signal synchronization method, and eliminating deviation in the sampling process; 4) filtering the simulation signal and the measurement signal by using a signal filtering method, and extracting transfer functionsin the simulation signal and the measurement signal; 5) calculating a correlation coefficient of a transfer function between the simulation signal and the measurement signal, and judging a fault position by searching a maximum value of the correlation coefficient. The method can realize online monitoring based on a single observation point so as to cover the whole transmission line network, and has a relatively high practical value in power transmission line fault positioning.

A method for decorating an uneven surface of a dimensionally stable object is disclosed. According to the method, the object to be decorated and a digital, contactless printing head are moved in relation to one another during the printing operation and the printing head is controlled by a control unit in order to dispense ink. The method according to the invention comprises the following steps: a control program is created to control the printing head in accordance with the height profile of the uneven surface to be decorated of the object; the position of the surface to be decorated is detected in relation to the printing head; and the digital printing head is controlled using the program that has been created. The invention also relates to a device for carrying out the method.

An imaging system configured to provide improved position resolution is disclosed. The imaging system includes detector acquisition circuitry that is configured to acquire a plurality of rise-times and a plurality of amplitudes from a detector assembly that includes an array of one or more detector elements. The imaging system also includes position determining circuitry that is configured to determine a plurality of respective impact positions on each of the detector elements. The plurality of impact positions is based on at least the plurality of rise-times and the plurality of the amplitudes acquired by the detector acquisition circuitry.

An X-ray diffractometer for obtaining X-ray diffraction angles of diffracted X-rays by detecting with an X-ray detector diffracted X-rays diffracted at a sample when X-rays are emitted at the sample at each angle of the angles about a center point of goniometer circles, the X-ray diffractometer having a pinhole member provided with a pinhole, the pinhole allowing X-rays diffracted from the sample to pass so that the diffracted X-rays pass through the center point of the goniometer circle, and other diffracted X-rays are shielded by the pinhole member.

The invention discloses a precision-location stepping motor for a micro-stepping instrument, which comprises a shell upper cover (1), a shell lower cover (2), a permanent magnet rotor (3), a primary transmission gear set driven wheel (5), a secondary transmission gear set driving wheel (6), a primary transmission gear set driven wheel rotary shaft (7), a secondary transmission gear set driven wheel (8), a three-level transmission gear set driving wheel (9), a three-level transmission gear set driven wheel (11), a pointer drive shaft (12), an excitation winding coil XA (13), an excitation winding coil XB (14), a coil pin A (15), a coil pin B (16), a coil pin C (17), coil pin D (18), a stator iron core body (19) and the like. The reduction ratio of a three-level reduction gear system is 720:1, and the minimum location resolution is 0.0833 degrees; and the invention realizes micro-stepping rotation on the aspect of structure, does not need an extra drive circuit when in use and is a stepping motor for the instrument ,which has precision location and can enable a point to smoothly move.

The invention relates to a frictionless inertia step scanner, which is characterized in that an expander pulls a sheet to a base, one end of a XYZ piezoelectric scanning tube is fixed on the base while another end supports the sheet and generates pressure. When in use, the invention adds a Z extension signal and a slow XY signal, quickly evacuates the two signals to process the XY evacuation in the Z retraction and use the Z-axis inertia force of the sheet to eliminate the XY-axis friction force, repeats and generates XY-axis step without friction interference. The invention has high large-scale step positioning precision and small-scale scanning and positioning functions, which leads in two independent Z-axis positioning devices to adjust the distance between two probes and sample, uses frictionless inertia step scanning device to accurately feed the test point of the first probe on the sample into the scanning range of the second probe, to realize one-point scanning dual-probe microscope, with complete, reliable and effective data.

A spacecraft payload element is rotated by a mechanism about virtual pivot point (VPP) substantially distant from the mechanism. The mechanism couples the payload element to a spacecraft main body structure, and has a four-bar linkage configured to rotate the payload element about a virtual pivot point (VPP). The VPP may be proximate to the focus or center of gravity (cg) of the payload element. Rotation of the payload element about the VPP may be controlled by linear or rotary actuators which drive the four-bar linkage. The four-bar linkage may be configured to provide a mechanical advantage to the actuator.

A method for suppressing electromagnetic background radiation in the image according to a precharacterization, a device for carrying out the method according to a precharacterization, a measuring instrument, and a use of the device for identifying a laser signal as a mark for subsequent measuring processes as well as for identifying a source of a laser signal.

A positioning apparatus includes a machine bench 1, an external pressure linear bearing assembly 2 and a slide body 3 mounted on the machine bench 1 through the bearing assembly 2 for reciprocating movement relative to the machine bench. The positioning apparatus has a frictional reciprocating drive mechanism 4 for reciprocatingly driving the slide body 3 which is provided and includes a main shaft 5 adapted to be rotated, and a plurality of rollers 9 disposed around the main shaft 5 and inclined at a predetermined angle relative to the main shaft 5. Each roller 9 is pressed relative to the main shaft 5 by a pressing member 15. The slide 3 and a rail 20 are made of ceramics. Magnets 41 are provided on the slide body 3 for developing forces of magnetic attraction between magnetizable members 42, provided on the machine bench 1, and the slide body 3.

The invention provides a piezoelectric ceramic driving method and device and relates to the technical field of precise displacement control. The problem that an existing piezoelectric ceramic driving method and device is easily interfered by environmental noise and accordingly positioning resolution ratio is low and cost is high is solved. The piezoelectric ceramic driving device comprises a controller, a digital-to-analogue converter, a voltage amplifier and a differential driver, wherein the digital-to-analogue converter receives a digital signal of the controller and then converts the digital signal into an analogue voltage signal, and the analogue voltage signal is amplified by the voltage amplifier and then is exerted onto piezoelectric ceramic through the differential driver. The piezoelectric ceramic driving method and device can effectively improve the resistance capacity of a driving signal to the environmental noise and improve the positioning resolution ratio of the piezoelectric ceramic and is low in cost.

This paper presents various methods that were developed to increase the position resolution and granularity of double sided segmented semiconductor detectors. These developments will increase the imaging resolution capability of such detectors, either used as Compton cameras, or as position sensitive radiation detectors in imagers such as SPECT, PET, coded apertures, multi-pinhole imagers, or other spatial or temporal modulated imagers.

A sensor device has a plurality of electrode portions configured to provide one or more electrical signals and a non-conductive material provided on or over the plurality of electrode portions. The one or more electrical signals are provided in response to a change in capacitance between (i) at least one of the plurality of electrode portions and a conductive object being near to or in contact with the non-conductive material, and / or (ii) at least one of the plurality of electrode portions and at least one other of the plurality of electrode portions. A system comprising the sensor device and method of manufacturing the sensor device are also provided.

A pixel array is composed of a plurality of pixel structures in array arrangement, and each pixel structure at least comprises a sub-pixel and an address pixel, wherein the addressing pixel is configured at one side of the sub-pixel and can generate electromagnetic radiation wave with invisible wavelength. The addressing pixel in the pixel array is properly arranged so that the pixel array can be divided into a plurality of groups of digital codes; therefore, the pixel array can be applied to constructing a non-touch panel input device by detecting a digital code combination composed of electromagnetic radiation wave generated by the addressing pixel.

An electron microscope is provided which can measure, with high sensitivity and high positional resolution, an amount of deflection of an electron beam occurring when it is transmitted through a sample. The electron microscope (100) is adapted to measure the amount of deflection of the electron beam (EB) when it is transmitted through the sample (S), and has an electron beam source (10) producing the electron beam (EB), an illumination lens system for focusing the electron beam (EB) onto the sample (S), an aperture (30) having an electron beam blocking portion (32) for providing a shield between a central portion (EB1) and an outer peripheral portion (EB2) of the cross section of the beam (EB) impinging on the sample (S), and a segmented detector (20) having a detection surface (22) for detecting the electron beam (EB) transmitted through the sample (S). The detection surface (22) is divided into a plurality of detector segments (D1-D4).

The present invention discloses an optical encoder including a light emitting module, a positioning device and a light separating structure. The light emitting module emits a light beam illuminating an illumination area of the positioning device. The positioning device includes light penetrating areas arranged in a dislocation manner. The light penetrating areas sequentially move into the illumination area. The light separating structure is disposed in the path of the light beam. The positioning device is disposed between the light emitting module and the light separating structure. When part of the light beam penetrates one of these light penetrating areas and is transmitted to the light separating structure, the light separating structure transmits the light to a sensing area and forms at least one first positioning optical pattern. The distance between two first positioning optical patterns formed by two adjacent light penetrating areas is greater than the pitch between the two adjacent light penetrating areas.

The invention discloses an equipment positioning method applied to a display screen or a projection screen. The equipment positioning method comprises the steps that a digital watermark image block isembedded into an image on a display screen, positioning equipment (e.g., a handwriting pen) with a camera is used to snapshoot the image block containing a digital watermark, watermark detection processing is performed on the image, therefore, the position of the handwriting pen is determined, a motion trail of the positioning equipment can be obtained through multiple positioning points, and then a handwriting input function is achieved. The method has the advantages that positioning resolution is high, the influence on picture quality is small, the handwriting input function can be directlyachieved on the display screen in a large size without a touch medium, realization operability is high, cost is low compared with a common touch screen, and high economic value is obtained.

A linear motion control mechanism comprises a rotor (1) mounted rotating around an axis (z). The rotor (1) has a first threaded part (3) and a second threaded part (6) separated by a central part (4)placed in contact with a stator (19) excited by an oscillator (21). A frame (10) defines a first threaded part (12) collaborating with the first threaded part (3) of the rotor (1). The second threadedpart (6) of the rotor (1) collaborates with an output shaft (13). Rotation of the rotor (1) with respect to the frame (10) results in movement of the output shaft (13) along the axis (z). The oscillator (21) comprises an oscillating mass (32) excited by an angular actuator (33) formed by piezoelectric actuators (42) arranged around a star-shaped support (38). The oscillator (21) is fitted insidethe rotor (1) configured in the form of a bell and comprising several stressed sectors (23a).

The pixel array consists of several pixel structures in array arrangement. Each of the pixel structures includes at least one sub-pixel and pixel shade on one side of the sub-pixel, and the pixel shade can generate electromagnetic wave in invisible light wavelength. Proper configuration of the pixel shades in pixel array can separate the pixel array into several digital codes, so that detecting the digital code combination constituted by the electromagnetic wave the pixel shades produce can apply the pixel array in constituting non-contact panel input device.

Methods are presented that increase the position resolution and granularity of double sided segmented semiconductor detectors. These methods increase the imaging resolution capability of such detectors, either used as Compton cameras, or as position sensitive radiation detectors in imagers such as SPECT, PET, coded apertures, multi-pinhole imagers, or other spatial or temporal modulated imagers.