479 results about "Laser target" patented technology

A laser imaging system and method of projecting a laser template on a surface, including independently determining a position and orientation of the surface using an external metrology device, independently determining a position and orientation of a laser projector using the metrology device, generating a signal from the metrology device to a computer and orienting the laser projector relative to the surface to project a laser template. The apparatus includes a plurality of metrology transmitters at fixed locations, a plurality of metrology receivers at fixed locations relative to the surface and a plurality of metrology receivers at fixed locations relative to either the laser projector or laser targets within a field of view of the laser projector. A laser projector and frame assembly is also disclosed, wherein the metrology receivers are located on the frame and the frame includes laser targets for correcting laser drift. Kinematic supports for the metrology receivers are disclosed as well as an independent laser tracker.

Method and apparatus for disinfecting and/or sterilizing a root canal system by targeting the water content of disease and debris in the canals. The laser technique of employs a frequency of the wavelength emissions between about 930 to about 1065 nanometers with an optimum of 980 nm. This range of wavelengths targets the water content of tissue cells and pathogens as well as any residual organic debris in water within the root canal system after its preparation while being poorly absorbed by the surrounding dentin. The selection of the optimum wavelength produces significant effects generating and advancing treatment to the targeted aqueous environments. This is due to the rapid energy absorption by the water and the subsequent creation of gas bubbles, liberation of heat and subsequent propulsion of waves of heat and gas that impact along the canal walls and ramifications resulting in an enhanced bacterial kill and cleaning of the canal walls and ramifications. No dyes or other additives are necessary to enhance the effectiveness of the laser kill of bacteria, etc.

The invention relates to a position and attitude parameter measurement system of a machine body of a boring machine and a method thereof, and the position and attitude parameter measurement system consists of a line laser transmitter, a rack of the line laser transmitter, laser targets, a programmable computer controller, an A/D conversion module and two inclination sensors. The line laser transmitter is positioned by a laser direction indicator and the rack of the line laser, emits a fan-shaped laser beam and forms linear spots on the machine body of the boring machine. An photosensitive element in one position on one of the two laser targets consisting of the photosensitive elements senses the laser beam and generates a current signal at any time, and the current signals are processed and calculated by an internal circuit of the laser targets and the programmable computer controller, thereby determining the positions of the laser beam on the laser targets; furthermore, the mounting positions of the laser targets on the boring machine are known, thereby obtaining a deflection angle and deflection displacement of the boring machine. Two inclination sensors measure a pitch angle and a roll angle of the boring machine, thereby completing the measurement of position and attitude parameters of the machine body of the boring machine. The system has the advantages of low cost, high precision, good real-time property and convenient operation.

A medical laser target marker includes a retro-reflector for receiving and reflecting light, at least one first medical tracking marker, and at least one second medical tracking marker. The at least one first medical tracking marker is arranged on the laser target marker and has a first functional configuration. The at least one second medical tracking marker is arranged on the laser target marker and has a second functional configuration different from the first functional configuration.

The invention discloses a device and a method for calibrating the dynamic tracking precision of a photoelectric tracking system. The device comprises a beacon light subsystem used for generating beacon light, a high-speed image acquisition system and a processing subsystem, wherein the beacon light subsystem comprises a high-precision laser target simulator, a laser target controller, a first computer and a target plate; the high-speed image acquisition system comprises a high-speed camera; and the processing subsystem comprises a second computer. The beacon light subsystem consisting of a solid laser, a beam expander, a fast tilting mirror and a reflecting mirror is used for generating the beacon light to the target plate and can simulate targets with a plurality of motion modes and movement speeds through faculae, so that the precision of equipment can be tested persuasively. The faculae are acquired by the high-speed image acquisition system and the high test precision can be obtained by using a high-speed digital image processing technology, so that the photoelectric tracking system is quickly and accurately calibrated according to the measurement of the tracking precision.

The invention relates to the design and manufacture of measuring instruments, in particular to a device used for detecting a rail by laser. The invention is characterized in that the device consists of a laser emitter (1), a locating receiving laser target (2), a measuring target (3) and a videography radio receiving device (6). The locating receiving laser target is provided with a camera head (4) and a videography electroplate (5). The invention has the advantages of simple and reasonable structure, low intensity, easy operation and high precision, etc.

The invention relates to a real-time guide system of a multi-sensor data fusion shield machine, comprising a laser overall meter, a laser target, a first prism, a second prism, a rear-view prism and a computer, wherein the rear-view prism is used for detecting whether the position of the laser overall meter is changed or not in the measuring process; the laser target is used for measuring an attitude angle of the shield machine in real time; the first prism and the second prism are respectively arranged at both ends of the shield machine; the laser overall meter measures coordinates of the first prism, the second prism and a laser target prism under a geodetic coordinate system by emitting lasers; and the computer computes to obtain multigroup attitude angles by combining with attitude angle data measured by the laser target and carries out fusion processing so as to obtain optimized shield machine attitude angles for implementing the real-time guide of the shield machine. The invention can still obtain the shield machine attitude angles when sensors inside the laser target are faulty or positioning prisms are shielded, ensures the continuous measurement and has high measurement accuracy, strong work stability, and the like.

A system and method for authenticating an optical fiber for use with a medical laser system includes a medical laser unit, an optical fiber, and a memory device. The laser unit is typically specific to a certain medical procedure and is under the operation of a control system. The optical fiber is operably coupled to the laser unit and includes a probe tip for position proximate laser-targeted tissue. The memory device is associated with the optical fiber, e.g., as an RFID tag embedded in fiber or a smart card operational with the fiber, and is configured to allow the control system of the laser unit to access information embedded in the memory device so that the optical fiber may be authenticated as suitable to operate with the laser unit.

The invention provides a real-time detection system and method for the spatial pose of a boom-type roadheader. The real-time detection system comprises two cross laser transmitters, an industrial control computer, two Internet protocol cameras and two laser targets. Machine vision technology is used as an acquisition manner for pose parameters; a mathematic model for resolving the pose of the roadheader is established so as to obtain the yaw angle, pitch angle, roll angle of the roadheader in heading process and the offset of a fixed point on the body of the roadheader on the cross section of a tunnel, i.e., the spatial pose of the roadheader, and the spatial pose can be used for deviation rectification in automatic heading of the roadheader. Experimental results show that the precision of an angle detected by the system is within 0.5 DEG and the precision of offset is better than 20 mm; an interval between processing time and displaying time for each frame of an image is about 5 s; so requirements of tunnel construction for automation, precision and real-time positioning are met.

A single dual mode monolithic focal plane array having an active sensor and a passive sensing capability is switched from one mode to the other by switching the bias across the cells of the array from a passive IR mode to an active LADAR mode, with the monolithic dual mode focal plane array having applications in missile target seekers and laser target designators. The switching is accomplished by increasing the gain of the array by as much as 30 times that associated with IR detection when laser return pulses are expected. Thus, there need be no mechanical changes to the array to afford both passive IR sensing and an active LADAR pulse detector. Nor need there be two different focal plane arrays, one for IR and one for laser radiation, which leads to boresighted alignment problems.

The invention relates to an on-line calibration method for automatic guiding system of shield machine based on gyro total station and laser target, characterized in that in digging process of shield machine, laser total station is used to track prism at the lower part of laser target and the change of horizontal azimuth angle of strap-down gyro north finder while by two accumulators in gyro north finder elevation angle and roll angle of gyro north finder are calculated; then by three altitude angles measured accurately angle speed of Z axis, which can not be measured by strap-down gyro north finder, is calculated; and then it is combined with angle speeds of X and Y axes measured by gyro to carry out strap-down altitude algorithm; finally three angles measured accurately are used as observing values and kalman filter is used to evaluate gyro excursion while it is compensated in system. The invention is provided with the merit that the error of gyro excursion can be eliminated on line and can be used to improve accuracy of automatic guiding system.

The electrostatic spinning process for preparing low density porous nanometer SnO2 fiber as laser target material is fast, efficient and simple. The electrostatic spinning process includes compound spinning solution with polyvinyl pyrrolidone, absolute ethyl alcohol, tin tetrachloride in certain weight proportion through mixing at room temperature; electrostatic spinning through spraying the spinning solution with spinning jet to an accepting screen 5-30 cm apart from the jet while applying electric field of 0.1-1 kv/cm, controlling the spraying time and the motion of the accepting screen to obtain fiber of different density and deposited in different areas; and roasting at 450-550 deg.c to obtain the nanometer SnO2 fiber.

The invention relates to an automatic guiding system of shield machine based on fiber gyro total station and PSD laser target, comprising fiber gyro total station, PSD laser target, computer of automatic guiding system and back-sight reference prism. The fiber gyro total station comprises fiber gyro north seeker, laser total station and ARM processor. The laser total station emits laser to the back-sight reference prism and PSD laser target so as to measure the distance from fiber gyro total station To back-sight reference prism and PSD laser target. The back-sight reference prism reflects laser emitted by laser total station according to the incident direction. The ARM processor calculates coordinates of laser total station, horizontal azimuth angle of emitted laser and coordinates of laser target. PSD laser target reflects laser emitted by laser total station according to the incident direction and measures the angle between the axis and incident laser and rolling angle and sloping angle of shield machine. The computer of automatic guiding system calculates the horizontal azimuth angle of shield machine. The invention is provided with high accuracy, automatic seeking north and convenient operation. It can be applied in automatic guiding in underground working device such as shield machine.

The present invention relates to a preparation technique for preparing nanometer tin anhydride fiber gas sensor film material by using an electrostatic spinning method. The present invention comprises: 1, collosol gel static filature liquid allocation: polyethylene ketopyrrolidine is poured into dissolvent containing N, N-dimethyfomamide (DMF); the dissolvent is mixed at high speed to be completely dissolved; the polyethylene ketopyrrolidine/DMF dissolvent with the concentration of 5 wt percent to 8 wt percent is produced; and then, the dissolvent is mixed with qua-water stannic chloride water solution with the concentration of 10 wt percent to 40 wt percent; wherein, the weight ratio of the polyethylene ketopyrrolidine and the stannic chloride is between 3 to 1 and 3 to 4; the product is made after being mixed for 3 hours. 2. electrostatic spinning: The prepared collosol gel static filature liquid is injected into a electrostatic spinning device and transformed into aluminum chloride/ polyethylene ketopyrrolidine nanometer fibrous coat on the conditions that the voltage is between 25 Kv and 35 Kv; the extrusion speed is between 1 ml/min and 10 ml/min and the receive distance is between 10 cm and 20 cm through the electrostatic spinning. 3. calcination: finally, the prepared aluminum chloride/ polyethylene ketopyrrolidine nanometer fibrous coat is placed in a muffle furnace; the temperature is raised to 450 DEG C to 600 DEG C at the speed of 50 DEG C per hour; nanometer tin anhydride fibrous coat is gained after being calcined for 5 hours. The nanometer tin anhydride fibrous coat produced by the present invention is gas sensing material with high specific area and high sensitivity; in addition, the material can be widely applied to the field of catalyst, laser target material and so on.

The invention relates to a system for testing isolation of a guide head, which is used for testing the isolation of the guide head of a laser terminal guided projectile and comprises a signal simulation part, a motion simulation part and a testing main control part, wherein the signal simulation part comprises a laser target simulator, a two-dimensional swing mirror and a reflection screen and is used for generating laser capable of being received by the guide head; the motion simulation part comprises a three-axis turntable capable of loading the guide head and is used for simulating the posture motion of a projectile body; the testing main control part is used for controlling a turntable body to simulate the posture motion of the projectile body according to a predetermined mathematical model, and receiving test data returned from the guide head, so that isolation performance analysis is carried out, wherein laser generated by the laser target simulator is projected on the reflection screen through the two-dimensional swing mirror; furthermore, the guide head receives laser reflected by the reflection screen. Because laser is prevented from being directly projected on the guide head, accurate and effective experimental data about the isolation test of the guide head can be obtained by operators; simultaneously, a real weapon system campaign mode can be well simulated.

The invention discloses a detection device for a laser rangefinder, composed of a sampler, an absorber, a multi-target simulator, a standard target and a variable diaphragm. The laser rangefinder emits a laser directed at the detection device; the sampler and the multi-target simulator simulate a laser target echo, and obtain an receiving optical axis and the minimum detectable power of the laser rangefinder via the maximum distance ranging result; a laser emitting optical axis and a collimation optical axis are corrected via a laser spot position and an axis distance; and the emission and the receiving of the laser rangefinder are quantitatively associated, in order to realize a ranging capacity evaluation of the laser rangefinder. The device disclosed by the invention has no need to be supplied with power, and is simple in operation and low in cost.

Systems and methods to calibrate aircraft surfaces are provided. A particular method includes installing a set of laser targets. The set of laser targets includes at least first laser target and a second laser target. The first laser target is installed on a first side of a first aircraft surface and the second laser target is installed on a second side of the first aircraft surface at a known location relative to the first laser target. The method also includes determining a first position of the first laser target with a first laser device. The method further includes determining a second position of the second laser target with a second laser device. The method includes determining a position of the first aircraft surface based on the first position of the first laser target and the second position of the second laser target.

The invention discloses a signal processing system for a photoelectric detector. A current pulse signal outputted by the photoelectric detector is converted into a voltage pulse signal through a pre-amplification module; a variable gain control module is used for receiving the voltage pulse signal, extracting and amplifying; a peak holding module is used for delaying the signal peak holding time outputted by the variable gain control module; an A/D converter is used for sampling the signal outputted by the peak holding module; a processor is used for receiving the parallel port and control signals outputted by the A/D converter and resolving a target angle value; the processor is used for sending a calculating result to a central control computer through a receiver. Through comprehensive design consideration, the signal processing system for the photoelectric detector not only can be applied to a post-signal processing circuit of an APD photoelectric detector but also can be used as the post-signal processing circuit of a PIN photoelectric detector, is capable of increasing the detection precision of a servo laser target detection system and is capable of effectively controlling the research and development cost.

The invention discloses a large building deformation monitoring device and a monitoring method through the large building deformation monitoring device. A laser transmitter of the large building deformation monitoring device is composed of a laser controller, a laser power supply and a laser collimator, wherein the laser controller is connected with the laser power supply, and the laser power supply is connected with the laser collimator. A laser receiver is composed of a semi-permeable laser target, a light shield, an image sensor, and an attitude sensor, wherein the semi-permeable laser target is connected with the light shield, the light shield is connected with the image sensor, and the image sensor, the attitude sensor and a wireless transmitter are respectively connected with a microprocessor, and therefore the large building deformation monitoring device is formed. The method monitoring method through the large building deformation monitoring device includes that the laser transmitter is mounted at a reference position which is close to an object to be tested and is relatively fixed; the laser receiver is mounted at a point to be tested on a deformation surface; and the linear displacement, perpendicular to the deformation surface, of the laser receiver is the deformation value of the point. According to the large building deformation monitoring device, laser is utilized for testing deformation, and therefore the large building deformation monitoring device is convenient to install and test, high in accuracy, and suitable for long-time on-line monitoring of the deformation of large buildings.

A system and method forming near diffraction limited size beacon for adaptive optical system using a temporally partially coherent laser source. Comprises projection of laser beams through turbulent medium having non-cooperative target using combination of adaptive optical system and short temporal coherence length laser source forming controllable focused laser target beacon. Combines adaptive optical system technology using any wavefront sensing technique making complex field measurements with short coherence length and associated broad spectral bandwidth. The partially coherent laser source forms narrow (near diffraction limited) size region of coherent laser light at target. The coherent region of return dominates signal for any measurement technique computing average of field over wavelength bandpass and can be used to pre-compensate either the partially coherent laser beam, a long coherence length beam of different wavelength or wavelength in bandpass, or both. Pre-compensation of the partially coherent laser beam can lead to signal-to-noise ratio enhancements.

The invention discloses a total station prism group, a tube push bench guide system for tunnel construction and a guide method of the tube push bench guide system. The tube push bench guide system for tunnel construction comprises a laser target, a main total station prism group, a plurality of branch total station prism groups, a rear prism, a communication box and a computer. The laser target is arranged on a tube push bench in a tunnel, the main total station prism group is arranged on a mounting support in a tunnel starting well opening, the rest branch total station prism groups are arranged on tunnel segments which are arranged between the laser target and the main total station prism group and advance along with the rube push bench one by one at intervals along with the tunneling of the tube push bench. The rear prism is arranged on the wall of the tunnel starting well opening, and the main total station prism group and the branch total station prism groups are all connected with the computer. The system and the method can achieve automatic measuring of gesture of the tube push bench during long-distance curved tube pushing tunnels and guide tunneling construction of the tube push bench.