53 results about "Position sensitive device" patented technology

Systems and methods for tracking an object's position and orientation within a room using patterns projected onto an interior surface of the room, such as the ceiling. Systems include at least one optical position sensitive device embedded in the object to detect relative changes in the projected pattern as the object's position and/or orientation is changed. In particular systems, the pattern includes a plurality of beacons projected by one or more steerable lasers. Projected beacons may be steered automatically to accommodate a variety of room topologies. Additional optical position sensitive devices may be disposed in known physical positions relative to the projected pattern to view either or both the projected pattern and the object. A subset of object positional data may be derived from a video camera viewing the object while another subset of object positional data is derived from the projected pattern.

Embodiments of the present invention improve upon component level inspection performed by pick and place machines. Such improvements include using a position sensitive device that measures the position of the placement head relative to the workpiece as the placement head travels towards and away from the workpiece during a placement cycle. The output of this sensor is used to selectably trigger the acquisition of the images used to measure a placement characteristic of the component placement machine.

A touch-control module for recognizing gesture inputs by a position sensitive device to an electronic device is disclosed. The touch-control module includes an input connected to the position sensitive device for receiving at least one sensing signal generated by the position sensitive device when one or more objects touch a surface thereof; a touch state unit for detecting the sensing signal and determining a touch state of the object(s), such as approaching to or lifting off the position sensitive device; a position and multi-gesture processing unit for analyzing the sensing signal to determine a touch position of the object(s) on the position sensitive device, and tracking the touch state and touch position to determine a corresponding motion factor; and an output connected to the electronic device for outputting the touch state and touch position as well as information corresponding to a motion factor whenever the motion factor is determined.

The invention relates to an active two-dimensional tracking collimator. The collimator consists of a base, a body frame, a telescope system, an electric control system, a visual image acquisition mechanism, a direction driving mechanism and a pitching driving mechanism, wherein the electric control system, the direction driving mechanism and the pitching driving mechanism are arranged in the body frame; the visual image acquisition mechanism is fixedly arranged on the telescope system; the telescope system is fixedly arranged on the upper part of the outer side of the body frame; and the electric control system is connected with the visual image acquisition mechanism, the direction driving mechanism and the pitching driving mechanism through data lines. The direction driving mechanism and the pitching driving mechanism realize two-dimensional (direction and pitching) movement of the collimator and the electric control system and the visual image acquisition mechanism realize two-dimensional (direction and pitching) information recognition of the collimator. In the telescope system of the invention, a normal of a target prism and a collimation deviation angle of an optical axis of the collimator are measured and subdivided by adopting a position sensitive device (PSD), so that the direction of the prism can be actively tracked and measured in real time.

The invention relates to the field of radioactive nuclear beam physics, heavy ion beam cancer treatment, heavy ion irradiation materials and heavy ion irradiation breeding. A position sensitive detector for higher energy heavy ion beam diagnosis is mainly characterized in that a beam probe is arranged in an air seal cavity, and the beam probe is fixedly connected to a fixing support of a port sealing flange assembly. The air seal cavity comprises an incidence window arranged on one side of an air box and an exitance window arranged on the other side of the air box. The beam probe is composed of two beam measuring units. Each beam measuring unit is composed of a high voltage pole, an insulating cushion plate and a signal pole which are sequentially arranged. The port sealing flange assembly is composed of the fixing support and a port sealing flange. A multichannel signal leading out pin board comprises a multichannel signal leading out board and a multichannel signal pin board. A contact end is arranged at one end of the multichannel signal pin board, inserted into a sealing opening of a sealing flange, and is connected with the signal output end of the multichannel signal leading out board. A multi-core connector is arranged at the other end of the multichannel signal pin board and serves as a signal output end opening of the beam position sensitive device. The signal input end of the multichannel signal leading out board is connected with the signal poles of the beam probe.

A measurement system comprising an analog position sensitive device is provided that can measure the XY position of a plurality of light beams at very high resolution. In accordance with one exemplary associated method, a connector bearing one or more optical fibers is fixedly positioned before a position sensing detector so that light emanating from the ends of the optical fibers will strike the position sensing detector. A light beam is passed through at least one opening in the connector, such as a guide pin hole onto the detecting surface of the PSD to establish the position of the connector. Next, each optical fiber in the connector is individually illuminated sequentially so that the light emanating from the fiber falls on the position sensing detector. The locations of all of these light beams striking the PSD are compared to position of the light beam passed through the guide pins and/or to each other to determine if all the fibers are in the correct positions relative to the connector. In addition, it is possible to simultaneously measure the magnitude of the light emanating from each fiber in order to measure the quality of the light transmission through the connector/cable assembly.

A detecting head of dual-element atomic microscope is composed of a photoelectric detecting and feed-back reference unit which consists of laser, position sensitive device, half-transmitting mirror, microcantilever probe and Z-direction piezoelectric ceramics, measuring unit, and the scan control system consisting of XY piezoelectric ceramics, sample carrier, reference specimen and the sample to be detected. Its advantages are high precision (nano and submicron in length), and wide measuring range (5 microns).

A probe of horizontal atomic microscope includes a scan and feedback controller consisting of XiY and Z piezoelectric ceramics and specimen table, and a photoelectric detection system composed of microcantilever probe, laser and position-sensitive device (PSD). Its advantages are simple structure, and high efficiency and precision of atomic force as there is no influence of gravitation to atomic force.

The invention relates to the field of development of a photoelectric instrument, and discloses a cube-corner prism optical vertex aiming device and an assembling and regulating method thereof. The cube-corner prism optical vertex aiming device comprises an autocollimation instrument, a spectroscope and a reflector which are sequentially arranged along the same optical path; the autocollimation instrument is used for emitting measurement light and detecting emergent and incident angles of the measurement light; the reflector is arranged on a transmission optical path of a first light splittingface of the spectroscope relative to the autocollimation instrument; and an image detector and an imaging lens are sequentially arranged on a reflection optical path of a second light splitting face of the spectroscope relative to the reflector. According to the invention, in order to accurately acquire reference coordinates on a position sensitive device, and before the reference coordinates areacquired, the autocollimation instrument is utilized to replace a laser, and the image detector and the imaging lens are adopted to replace the position sensitive device, so as to carry out assemblingand regulation on the cube-corner prism optical vertex aiming device, improve measurement accuracy and meet the high-accuracy positioning requirement of an optical vertex of a cube-corner prism.

A method to control a motion heading at a receiving end by referring to a relative angle between the receiving end and a transmission end includes the following steps: Step A: solving a command angle, α, between an original heading and a user inputted direction of transmission end; Step B: having a signal-receiving unit at the receiving end to pick up signals sent from the transmission end; Step C: determining a signal source orientation according to strength of the signals received by the signal-receiving unit which comprises multiple sensors or a position sensitive device arranged in a form to pick up the signals from the transmission end; Step D: solving a relative angle, β, between the signal source orientation and an original motion heading of the receiving end; and Step E: solving a new motion heading according to the angles α and β.

The application relates to a head tracking system determining a head position of a user, comprising a light source (10) emitting light onto a rectangular position sensitive device (100) provided in a support structure (200). The light emitted by the sight source generates a light spot on the position sensitive device, and a head position determining module (170) is provided using the position of the light spot on the position sensitive device to determine the head position wherein the support structure (200) is designed to support the position sensitive device (100) in such a way that a head rotation results in a displacement of the light spot to a corner of the rectangular position sensitive device.

An automatic tester for an analog micromirror device includes a computer having an ADC and DAC connected to its peripheral bus. A micromirror device under test is mounted on a black box containing a light source such as a laser and a position sensitive device. The light beam is reflected by the micromirror device onto the position sensitive device so that the deflection of the mirror in two axes can be measured. The output of the position sensitive device is amplified and coupled to the ADC via a tester board. The computer can test the micromirror device to detect mechanical failure and to measure the resonant frequency and Q of the driving coils, and SNR of the internal package feedback which measures the position of the mirror.

The liquid phase atomic force microscope probe includes successively photoelectronic detection system comprising laser and position sensitive device; scanning and feedback controlling system comprising XYZ piezoelectric ceramic, gas-liquid isolating plate and micro cantilever probe; elevated liquid unit comprising sample, sample seat, liquid pond and elevating stage. The liquid phase atomic force microscope probe of the present invention is simple in structure, easy to realize technologically and widely suitable for measurement and observation of conductor, semiconductor and insulator samplein air, liquid or even electrochemical environment, and may find its wide application in various science, technology and industry fields.

The invention relates to a seawater salinity detection device with a prism model capable of refracting for multiple times, which comprises an upper computer, a right-angle prism and a signal acquisition and processing module; optical glass which is perpendicular to an emitting light path of a laser and two pieces of optical glass which form a group of prism models in a mode of forming an acute angle alpha 1 and an obtuse angle beta 1 with the emitting light path of the laser are arranged below the laser and a position sensitive device, and two pieces of optical glass, which form a group of prism models and form an acute angle alpha 2 and an obtuse angle beta 2 with the opposite direction of the emitting light path of the laser respectively, are arranged above the right-angle prism sequentially; and the optical glass and a shell of the device enclose an upper closed reference cavity filled with reference liquid, and the optical glass and a shell at the bottom end of the device enclose a lower closed reference cavity which is provided with the right-angle prism and filled with the reference liquid. The seawater salinity detection device has a simple structure and is convenient to use, and due to the adoption of the prism models, the deflection angles of light rays are expanded, the resolution, accuracy and interference resistant capacity are improved, the length of the instrument is shortened, and the equipment cost and measuring cost are reduced.

The invention relates to a photoelectricity mixing correlator based on a position sensitive device (PSD) position detector. For the first time, the PSD position detector is introduced into a matched filtering correlator, correlation peak information is collected by a PSD, and target position information is extracted according to the correlation peak information of a target image and a template image after photology correlation conversion. Photoelectric conversion efficiency is greatly improved, and simultaneously organic combination of flexibility of electronics and high speed of optics is achieved. A matched filter is conducted in advance by an electronics method, the target image and the template image are input into a spatial light modulator, optics Fourier transformation is conducted by a Fourier transformation lens, and related computing results are collected by the PSD position detector. The photoelectricity mixing correlator based on the PSD position detector can be applied to high-speed image stabilizing of video, high-speed identification and tracking of a target and the like.

The invention discloses a novel passive flexible optical electrode, which is composed of an optical sensing device (1), a flexible probe (2), a base (4), an electric lead layer (5) and a transition layer (7), wherein the flexible probe (2) is embedded in the base body (4) in an array type, the flexible probe (2) comprises a free end and a bottom end, the free end is in direct contact with an organism, and the bottom end is bonded with an electric lead layer (5) through a transition layer (7). The electric lead layer (5) is arranged on the upper surface of the transition layer (7); an electrodegroove structure formed on the conductive layer (5) serves as an interface with the optical sensing device (1). The invention effectively reduces hair interference and contact impedance between electrode and scalp, integrates with optical sensitive device, removes noise interference and motion artifact caused by conductor, improves sensitivity and compatibility of electro-optical sensing, and realizes wearable long-term stable EEG signal detection based on optical principle.

The invention discloses a foundation settlement monitoring system based on laser measurement, which mainly solves the problems of inconvenience, inaccurate result and poor real-time performance of theconventional foundation continuous settlement detection. The foundation settlement monitoring system mainly consists of controllers, lasers, two-dimensional photoelectric position sensitive devices,photoelectric displacement measuring modules, foundation settlement offset calculating modules, wireless communication modules and alarms. The foundation settlement monitoring system is characterizedin that: two or more monitoring points are arranged in areas with different geological conditions in space, each monitoring point is provided with a set of laser transmitting and receiving equipment,and the controller is used for measuring laser spot displacement parameters between the monitoring points and sending the laser spot displacement parameters to the controllers on other monitoring points through the wireless communication module; each monitoring point is provided with a laser emitter and a laser spot displacement detection circuit, and the monitoring points work intermittently, sothat the purpose of saving power consumption is achieved; and when a settlement value exceeds a preset alarm value, the alarm is started to warn, so as to remind related personnel of paying attentionto safety.

The invention belongs to the pose measurement technical field and relates to a six-degrees-of-freedom pose measurement method and device. The six-degrees-of-freedom pose measurement method includes the following steps that: a plurality of light sources are disposed on a first plane and form a polygon, and the sensitive surfaces of the plurality of light sources, which face a two-dimensional PSD (Position Sensitive Device), are adjusted; a modulation circuit controls the plurality of light sources to emit light sequentially in accordance with preset rules; the two-dimensional PSD sequentially receives the light emitted by the plurality of light sources and converts the light into corresponding electrical signals; and a signal acquisition and processing circuit acquires the six-degree-of-freedom pose information of the sensitive surface of the two-dimensional PSD relative to the first plane or acquires the six-degree-of-freedom pose of the first plane relative to the sensitive surface of the two-dimensional PSD according to the preset rules for emitting the light and the received electrical signals. According to the six-degrees-of-freedom pose measurement method and device of the invention, one two-dimensional PSD is adopted to achieve six-degrees-of-freedom pose measurement, and therefore, the number of two-dimensional PSDs can be decreased, and system design can be simplified. The six-degrees-of-freedom pose measurement method and device of the invention can be applied to the six-degrees-of-freedom pose measurement of a space micro-gravity active vibration isolation device.

The invention relates to a high-sensitivity photoelectric level detection device. The high-sensitivity photoelectric level detection device comprises a dark box, a plane mirror, a PSD (Position Sensitive Device) photoelectric sensor, a filament and a laser, wherein the dark box is cuboid-shaped; the plane mirror is fixed on a lower bottom surface of the dark box; the PSD photoelectric sensor is fixed on an upper bottom surface of the dark box; the laser is suspended in the center of the upper bottom surface of the dark box through the filament. When the dark box is placed horizontally, the plane mirror is irradiated by light spots of the laser and reflects the light spots to the center of the PSD photoelectric sensor; when the dark place inclines, the plane mirror is irradiated by the light spots of the laser and reflects the light spots to a non-central area of the PSD photoelectric sensor, the displacement of the light spots relative to the center is converted into proportional current through the PSD photoelectric sensor, and the inclination of the dark box is converted from the current.