368 results about "Astronomical telescopes" patented technology

The invention discloses a follow-up tracking dynamic and static isolation type dual-super satellite platform and a working mode implementation method thereof. The follow-up tracking dynamic and static isolation type dual-super satellite platform is suitable for sensitive load spacecrafts with the ultra-precision and ultra-stability requirement. Dynamic and static isolation is used as the means, a satellite is divided into a load cabin and a service cabin, the load cabin can ensure that the effective load meets the expected ultra-precision and ultra-stability control requirement through a high-performance magnetic levitation flywheel arranged on the load cabin, the service cabin can resist environmental disturbance and track the load cabin in a follow-up mode through an external actuator mounted on the service cabin, and accordingly the two cabins can meet the expected relative pose requirement. The load cabin is connected with the service cabin through a suspension device in a non-contact mode, vibration disturbance of the service cabin can be effectively isolated, and the vibration isolation effect cannot be affected by the sensor performance. The satellite based on the dual-super satellite platform at least has the launching, ultra-precision and ultra-stability, anti-collision or mobility working mode. The dual-super satellite platform can be applied to high resolution sensitivity effective load spacecrafts such as a high resolution remote sensing satellite and a deep space exploration astronomical telescope.

An arc-driven large-bore astronomical telescope is driven by a RE permanent-magnet synchronized arc motor. A control mechanism includes an upper machine and a lower machine; the upper machine is connected with the lower machine through serial communication; the lower machine carries out the real-time control; a motor stator is composed of 15 blocks, each block consists of 9 complete silicon steel plates and two silicon steel plates for reducing the edge effect; an armature winding is arranged according to UVWUVWUVW from right to left; a rotor is composed of 4 blocks and has 120 magnetic steel plates in total, the rotor adopts the torque design for reducing tooth space and is provided with a fastening device; an absolute coder and an incremental coder are simultaneously arranged in the control mechanism signal collecting and comparing links, the former is used for the turnover of a servo motor and the latter is used for testing the position of the servo motor; the signal of the coder is transferred to the DSP module of the lower machine through a singlechip; a drive circuit adopts a digital-driven intelligent power module. The present invention can achieve the needs of long-time, high-precision tracing and observing various celestial bodies and meet the requirements of precision and wide speed regulation in astronomic observation.

The invention relates to an automatic focusing method for an astronomical telescope and belongs to the technical field of spatial object detection of the astronomical telescope. The method comprises the following steps: acquiring a corresponding unimodal and monotonic image gray gradient evaluation function on a time domain according to energy distribution, which is accordant with a target image, of the frequency-domain characteristic of a point spread function for an optical system of the astronomical telescope and the Rayleigh energy conservation law; performing low-pass filtering on the evaluation function to obtain an ideal target energy concentration ratio evaluation function; and continuously adjusting the step length and the direction of a driving motor and searching a global maximum of the evaluation function to complete an entire automatic focusing process by using an optimized hill-climbing method. The method has the advantages of simpleness, easy realization and generality.

The invention provides an eight-rod-connecting type non-contact satellite platform configuration and an assembling method. The eight-rod-connecting type non-contact satellite platform configuration comprises an upper connecting plate, a lower connecting plate, four same vertical mounting force actuators and four same horizontal mounting force actuators; both the vertical mounting force actuators and the horizontal mounting force actuators are connected between the upper connecting plate and the lower connecting plate and are arranged in a circumference manner; the vertical mounting force actuators and the horizontal mounting force actuators are arranged along the same circumference in a staggered and orthorhombic manner; the vertical mounting force actuators are vertical to the horizontal mounting force actuators. The eight-rod-connecting type non-contact satellite platform configuration implements complete isolation of an effective load on platform vibration and interference response, can be applied to spacecrafts with high-resolution sensitive effective load, such as a very-high accuracy remote sensing satellite, a deep space exploration astronomical telescope and the like, and can greatly improve exploration performance of spacecrafts.

A digitally controlled platform for precise celestial tracking of astronomical telescopes, generally those having an independent pointing mechanism. A movable stage carrying the telescope is moved relative to a base by three digitally controlled actuators each of which determines the distance between a point fixed in the base and a point fixed stage. The base and stage otherwise are connected by a mechanism that holds a single point fixed in the base in coincidence with a single point fixed in the stage. It functions without approximation at any digitally specified latitude and longitude, enabling astrophotography with alt/azimuth mounted telescopes and diurnal tracking through the zenith. The digital controller may be a personal computer laptop running a multitasking operating system linked to the platform electronics by a Universal Serial Bus cable. Novel software design allows precise tracking, control, and calibration in spite of operating system and Universal Serial Bus latency.

This invention relates to a control device for controlling an astronomical telescope and, specifically, to a control device for automatic locating of celestial bodies, and to a method for controlling an astronomical telescope. The control device comprises a power input interface, a master controller, and an intelligent motor drive controller. The master controller comprises a CPU, an optional RAM, a FLASH microprocessor, one or more buttons, an LCD, a buzzer, one or more backlight diode lamps, one or more LED lights, a serial to USB interface, and an internal serial bus. The intelligent motor drive controller comprises a chip microprocessor having IAP functions, a two-way reversible PWM driving circuit having an output end and a detection end, a direct current motor, an optical encoder, an optical encoder detection circuit, and an over-current protection circuit. By calculating the coordinates of target bodies and converting them to equatorial mount coordinates, the microprocessor in the intelligent motor controller controls the motor to run, realizing the tracking of target celestial bodies.

The invention discloses a super-mapping machine which comprises a remote sensing and telemetering system, a three-dimensional attitude system and a central control and positioning communication system, wherein the remote sensing and telemetering system comprises an infrared laser light source (2), a search imaging unit (3), an image processing unit (4), an astronomical telescope imaging unit (5) and a photoresistor (1); the three-dimensional attitude system comprises a pitching pose unit (6), a horizontal axis (9), a horizontal attitude unit (7), a heading attitude unit (8) and a vertical axis (10); the central control and positioning communication system comprises a central processing unit (11), a man-machine interaction unit (12), a storage unit (13), a global positioning unit (14), a communication unit (15), an image recognition unit (16) and a power supply unit (17). The invention provides a field portable machine system which can acquire high-precision three-dimensional images in a geodetic coordinate system under the range finder-free conditions.

The invention relates to an ultra-sensitive spectral imaging astronomical telescope based on second-order compressed sensing, which comprises an optical unit and an electric unit, wherein the optical unit comprises an astronomical telescope lens, a first spatial light modulator, a collimation part, a spectrometric part, a spectral convergence part, a second spatial light modulator and a collection part; the electric unit comprises a single-photon point detector, a counter, a random number generator, a control module, a data packet memory and a compressed sensing module; a celestial image is collected through the astronomical telescope lens, and is imaged to the first spatial light modulator; a randomly modulated light beam is collimated into parallel light, and the parallel light forms a spectral band through the spectrometric part; the spectral band is secondarily randomly modulated through the second spatial light modulator, and is finally collected in the single-photon point detector; and a compressed sensing algorithm is used for obtaining an astronomical target spectral image according to a photon count value and two groups of random matrixes.

The invention relates to an ultrasensitive astronomical telescope, which comprises an astronomical telescope lens, a spatial light modulator, a convergence light receiving component, a single-photon point detector, a counter, a data packet memory, a random number generator, a control module and a compression sensing module. Light signals are collected by the astronomical telescope lens and are imaged on the spatial light modulator; the spatial light modulator carries out random modulation on the astronomical image and reflects light of different positions to the convergence light receiving component; light signals collected by the convergence light receiving component form to-be-detected very weak light, and the light is transmitted to the single-photon point detector; the random number generator controls the spatial light modulator to carry out random modulation on the light signals; the single-photon point detector detects single photons in the to-be-detected very weak light and single photon signals are converted into electrical signals to be outputted; the counter records the number of electrical pulses in the signal photon number; the control module carries out control coordination on the whole ultrasensitive astronomical telescope; and the compression sensing module uses the single photon number, the random matrix and sparse matrix for realizing reconstruction of the astronomical image.

This invention relates to one space telescope visual frequency CCD automatic guide method, which comprises the following steps: fixing visual frequency CCD in guide lens cylinder and main lens cylinder; through CCD image process getting space object image; rotating CCD to make the space image parallel along X direction and rectascension or declination for space object imaging by CCD; computer uses visual frequency to catch image for guide according to visual image and its changes.

The invention relates to a lens construct which is filled with liquid and a solar energy board light concentrating system. A transparent solid outer shell with a convex lens shape is filled with liquid such as water to form a convex lens. A solar energy board is arranged between the convex lens which is filled with liquid and the focus of the convex lens to make the solar ray focus on a solar energy battery through the convex lens to generate strong light and increase electric energy. The weight of the convex lens is reduced, and the material cost is reduced. The invention can be used for light concentrating of the solar energy board system in great deals. The invention can have convex lens shapes with different uses, such as an astronomical telescope, a microscope and a triple prism, etc. The weight of the lens is decreased.

The invention relates to an arm type space astronomical telescope inertial pointing control method and control system and belongs to the industrial automation field. With the arm type space astronomical telescope inertial pointing control method and control system of the invention adopted, the problem of low inertial pointing control precision of an existing arm type space astronomical telescope inertial pointing control method can be solved. The control system comprises a controller, a telescope inertial position sensor electrically connected with the controller, joint position sensors of which the number is equal to the number of rotating joints, motor driving circuits, motor current sensors and joint inertial speed sensors, wherein the joint position sensors are electrically connected with the controller; a joint motor is fixed on each rotating joint; the joint motor and the joint position sensor on the same rotating joint are in mechanical connection with each other; and each joint motor is electrically connected with one motor driving circuit and one motor current sensor. Design of a control algorithm and completion of compensation for nonlinear terms can be realized according to a dynamics model of an arm type space astronomical telescope, and closed-loop feedback of each joint can be realized through the joint inertial speed sensors, and therefore, inertial pointing control precision can be improved.

The invention discloses a pneumatic type support system of a primary mirror of an astronomical telescope. The system comprises a pneumatic type force actuator system as a key member, wherein a force output end of the force actuator is linked with a mirror plane through a force sensor; the system is characterized in that the force actuator precisely outputs force by adopting a pneumatic theory. Gas pressures of the two ends of a piston in a cylinder are controlled by a control system through an electricity-air ratio valve according to a signal of the force fed back to the control system of the force sensor. The system comprises an ultralow friction cylinder, a high-precision electricity-air ratio valve and a force sensor closed loop; the size of the force output by the actuator is controlled precisely; the response frequency is up to 1HZ; and meanwhile a desired stroke range of the force sensor can be set; a larger force range can be achieved by setting up a pressure range of the air; and furthermore, the system can be used in an extremely severe environment such as the South Pole, and has low requirements on the environment.

A Shack-Hartmann wavefront sensor used for an adaptive optical system is suitable for a large-diameter astronomical telescope and comprises a beam-shrinking system and an array lens. The wavefront sensor is characterized in that a beam-dividing system, at least two sets of coupling object lens, at least two sets of CCD detectors and a signal synchronous collecting system are also adopted; after the wavefront information is divided into the wavefront sub-array by the array lens, the beam-dividing system is adopted to divide the wavefront sub-array into at least two sub zones in space and each sub-zone adopts one coupling object lens and one CCD detector for slope detection; the wavefront information of each sub-zone is collected and processed by the signal synchronous collecting system; the obtained slopes are combined and then are recovered to get a complete wavefront phase distribution; at least two sets of detector are adopted to work in parallel so as to reduce the capability requirement to the CCD detectors and effectively overcome the technical difficulties to the CCD detector by the excessive detection sub apertures; the wavefront sensor is insensitive to the optical path overall errors and the tilt errors which can not be easily overcome in the assembling-regulating process of the beam-dividing system, thus adding no the complexity to the sensor system.

The present invention relates to the control method of the arc motion of a large caliber astronomical telescope. The method comprises steps as follows: a DSP module is arranged in a hypogynous computer system; the control program of the hypogynous computer system comprises steps as follows: 1. the initial value of a control register in the DSP module is set; the current and the voltage at a motor stator end is measured and the DSP module is initialized; 2. an A/D is collected and kept; a direct torque control algorithm program is processed and a corresponding PWM signal is generated; 3. novel data collection and refreshing is finished and a voltage vector is reselected; 4. data exchange is carried out, which mainly comprises the steps of receiving from a host computer, refreshing the servo control parameter of a local host and setting the servo operation mode; the parameter in an EEPROM is saved; the keyboard value of the DSP module is read and displayed. The system can satisfy the requirements of long time, high precision tracking and observing various celestial bodies for the large caliber astronomical telescope. The present invention also satisfies the requirements of precision and wide speed control for astronomical observation.

The invention discloses a method for performing rapid celestial fix through a CCD (charge coupled device) zenith telescope on the ground. According to the method, the CCD zenith telescope is used for imaging a fixed star in a sky region near to the zenith of an observation point twice (the barrel of the telescope rotates by 180 degrees around a rotating shaft during the two times of imaging); precise astronomical longitudes and latitudes of the observation point can be rapidly obtained by processing the two shot fixed star images, the corresponding precise time and inclinometer data. Compared with the conventional generally used satellite positioning method, the method disclosed by the invention has the advantages of full autonomy, high reliability, high invisibility, working safety, no electromagnetic interference and the like. Compared with other celestial fix methods, the method disclosed by the invention has the advantage of high precision. Furthermore, star selection is not needed in the method, so that the observation process is simplified, and the observation efficiency is greatly improved; the shortcomings that the conventional astronomical telescope is complicated in observation and low in efficiency, needs an observation foundation pier and cannot perform mobile observation are overcome. The method has extremely good development and application prospects.

The invention provides a follow-up tracking type dynamic and static isolation type double-super satellite platform and a manufacturing method thereof. A brand new idea of a platform follow-up tracking effective load is adopted, super-precise and super-stable control is performed on the platform with the effective load being the center, and a follow-up tracking effective load coarse control mode is adopted for the platform. Meanwhile, by means of the dynamic and static isolation method, a satellite is divided into a load cabin and a service cabin; the load cabin guarantees that the effective load reaches expected super-precise and super-stable control through a high-performance magnetic levitation flywheel arranged on the load cabin; the service cabin resists environment interference and performs follow-up tracking on the load cabin through an outer executing mechanism installed on the service cabin; and the two cabins can reach expected opposite poses. The load cabin and the service cabin are connected in a non-contact manner through a levitation device, vibration interference of the service cabin can be effectively isolated, and the vibration isolation effect is not affected by sensor performance. The double-super satellite platform can be applied to spacecrafts, such as high-resolution remote sensing satellites and deep space exploration astronomical telescopes carrying high-resolution sensitive effective loads.

The invention provides a large-aperture rolling shutter of an astronomical telescope CCD camera. The center of a shutter cloth is provided with an exposure window. Two ends of the shutter cloth are respectively rolled at two shutter rolling shafts which are connected with shutter motors respectively. The large-aperture rolling shutter is characterized in that the two shutter rolling shafts are connected with position encoders respectively, the outputs of the two position encoders are connected with a position motion controller respectively, the position motion controller is connected with a control computer and is connected with the shutter motors through a motor driving circuit respectively, the control computer controls the motion of the two shutter motors through the position motion controller and the motor driving circuit to control the opening and closing of the shutter. According to the large-aperture rolling shutter, the shortcoming in the prior art is compensated, the large-aperture shutter can satisfy the need of an astronomical telescope large visual field CCD camera, and at the same time, the large-aperture rolling shutter has the advantages of fast reaction rate, less light baffling, high mechanical strength, relatively large shutter transmission aperture, no shutter effect in exposure, and little possibility of fatigue.

The invention relates to an intelligent AC distribution monitoring system, in particular to an intelligent AC distribution monitoring system applied to the electric power distribution of an unattended operation type astronomical telescope, and consisting of five main parts including a system control unit, a distribution output unit, an electric quantity monitoring unit, a human machine interface module, an AC/DC power source and the like, wherein the system control unit is connected with the distribution output unit, the electric quantity monitoring unit and the human machine interface module, and the system control unit transmits the voltage information and the current information acquired by the electric quantity monitoring unit to the human-machine interface module for the local display treatment; simultaneously, the acquired electric quantity information and system existing state are transmitted to a remote control computer through an Ethernet network, thus the operation control of the distribution output unit is realized. The system can realize safe and flexible remote operation control and monitoring of the electricity distribution system of the unattended operation type astronomical telescope.

Large radio astronomy telescope co-driving parallel connection array mechanism belongs to physical construction designing technology field, in particular relating to co-driving parallel connection mechanism array having strong coupling character. It featuring that: each unit lower end connected with base through guiding constraint branched chain for restricting reflection plane unit rotating at horizontal direction, one active branched chain located below all nonadjacent peak, through one telescopic link flex action to control above three reflection plane units cooperation movement. The present invention can realize reflection plane long range matching movement on occasions of reducing drive motor number.