34results about How to "Scanning is flexible" patented technology

The invention provides an anti-interference system and an anti-interference method based on digital beam forming and space-time zeroing cascade. The method is to cascade the digital beam forming and space-time zeroing, thus, the interference resistance of the whole system can be improved. The anti-interference system comprises an antenna array, a radio frequency module and an anti-interference processing module which are connected in sequence, wherein the anti-interference processing module comprises a digital beam forming module and a space-time zeroing processing module; the digital beam forming module is used for weighting and synthesizing various antenna array element signals into a reference beam signal pointed to a satellite, and synchronously obtaining an orthogonal vector signal orthogonal to a steering vector; output of the digital beam forming module is cascaded to the space-time zeroing processing module; and the space-time zeroing processing module is used for carrying out self-adaptive zeroing interference resistance processing to an interference signal in the reference beam signal, removing the interference signal in the reference beam signal, and outputting an effective satellite signal.

The invention relates to the technical field of phased-array antennae and discloses a phased array beamforming method based on airborne equipment. The method comprises the steps of dividing a phased-array antenna array element into a left antenna array element and a right antenna array element; carrying out in-phase feeding on the left antenna array element and the right antenna array element, and adding a pattern function formed by the left antenna array element and a pattern function formed by the right antenna array element together to obtain a sum beam; carrying out anti-phase feeding on the left antenna array element and the right antenna array element, and carrying out subtraction on a pattern function formed by the left antenna array element and a pattern function formed by the right antenna array element to obtain a difference beam. According to the method, the application of the phased array beamforming method in the airborne equipment is achieved; the sum beam and the difference beam can be generated easily, and beam scanning can be achieved; the application of the phased-array antennae enables scanning to be achieved more flexibly, anti-jamming capacity to be high, and reliability to be high; meanwhile, the anti-jamming capacity of a system is improved by means of the sidelobe suppression technique.

The invention relates to dynamic three-dimensional laser scanning gauge head. It is made up of semiconductor laser, laser intensity control circuit, CCD video camera, image collecting card, computer, collision avoidance sensor group. It uses double pick-up heads information matching to avoid scanning blind, gain whole work-piece interface information, adjusts laser intensity to collect data for work-piece surface with different material to avoid work-piece material limitation, uses collision avoidance to ensure the gauge head safety while dynamic scanning, make it can scan any way in space to accomplish the work-piece whole data collection. It is suited for on line detecting in dynamic environment, has great practicability and generalization potential.

The invention provides a photoelectric near electric field scanner, and relates to a system used for measuring magnetic variable and electrical variable, in particular to a three-dimensional photoelectric near electric field scanning device equipped with an upper optical fiber crystal probe and a lower optical fiber crystal probe. The photoelectric near electric field scanner comprises the near electric field scanning device, a power supply, a controller, a drive module, three stepping motors, three position sensors, a signal processing circuit, a 485 bus communication module, a host computer, a semiconductor laser and an optical loop, and can be used for scanning the near field intensities of the front and back side electric fields of a circuit board to be measured simultaneously, so as to avoid secondary interference and radiation on a component to be measured during scanning, and overcome the defects that in the prior art, space electromagnetic interference introduction, observation, recording and data analysis of an electric field detect system are complex, vibration generates during a moving process, the control mode is not flexible enough, and the measuring accuracy is low.

The invention discloses an MEMS (micro electro mechanical system) optical scanning probe capable of switching work modes. The MEMS optical scanning probe comprises a case and a main body base assembled in the case, wherein a lens assembly is arranged in a groove formed in the upper side of the main body base, a first MEMS micro lens is arranged in a groove of the slope surface of the main body base, a second MEMS micro lens is arranged in a groove formed in the lower side of the main body base, light beams are emitted onto the first MEMS micro lens through a lens assembly via optical fibers and are then reflected onto the second MEMS micro lens through the first MEMS micro lens, an external circuit controls the on-off state of the voltage on the second MEMS micro lens, further, the second MEMS micro lens is controlled to be in the in-space tilting or in-space flat expanding state for realizing the free switching among the forward scanning, the lateral scanning and the lateral forward scanning of the probe. The MEMS optical scanning probe has the advantages that the probe only adopts one lens assembly, so the double MEMS micro lenses can realize the switching of various work modes, and the use is more flexible.

The invention discloses a double-working-mode micro electro mechanical system (MEMS) optical probe which comprises a probe tube casing with a window base and a probe main body arranged in the probe tube casing, wherein the probe main body comprises a main body base, an MEMS micromirror with a base, a first lens assembly and a second lens assembly, wherein the first lens assembly and the second lens assembly are connected with optical fibers. The MEMS micromirror electrically connected with an external driving circuit is fixed at the front end of the main body base; the first lens assembly is fixed on one side of the main body base and achieves frontward scanning or lateral frontward scanning of frontward or lateral frontward scanning light beams through crosswise deflection of the MEMS micromirror; and the second lens assembly is fixed on the other side of the main body base and achieves lateral scanning of lateral scanning light beams through crosswise deflection of the MEMS micromirror. The double-working-mode MEMS optical probe performs probe assembling through the double lens assemblies, can achieve two working modes through one MEMS micromirror, can be used for scanning imaging of cavities of multiple organs in human bodies and performing diagnosis and can be used in the field of detection and measuring in industry and the like.

The invention relates to a method and a device for decoding a signal (10) that is transmitted via at least one connection line (32) of a data transmission system, in a subscriber (30) of the data transmission system receiving the signal (10). According to the invention, the interval caused by a modification of the signal (10), obligatorily provided in a transmission protocol used in the data transmission system, from the rising edge to the falling edge or the falling edge to the rising edge, is measured. The tendency for an asymmetrical delay of the signal (10) can be determined from the measured interval. The scanning of the bits of the received signal (10) can be improved according to the interval or the asymmetrical delay, for example by adjusting the scanning point (12') in a variable manner. Alternatively, the interval or the asymmetrical delay are used for diagnosis purposes.

The invention relates to the field of secondary radars, in particular to a method and a system for detecting a plurality of targets of phased array secondary radars. The method comprises steps of receiving information about targets to be detected sent from an information source sensor; gathering and grouping the targets according to the information about targets to be detected, determining a pointing direction of each group of beams sequentially according to grouping sequence and forming a beam scheduling strategy; according to the beam scheduling strategy, sequentially scheduling beams to transmit inquiry signals and receive target response signals, and resolving the received target response signals to complete detection on the targets. By making the inquiry strategy to control transmission times and pointing directions of the beams, detection on the plurality of targets can be achieved in non-interfering inquiry beams in batches, false alarm or leak detection caused by the fact that the targets to be detected are positioned in covering critical regions of the beams can be avoided, introduction of ambiguity results caused by the fact that one target is covered by a plurality of beams is prevented, the accuracy rate of detection on the plurality of targets is increased, and precision of applications such as monopulse angle measurement is improved.

The invention discloses a device and method thereof, which can use the array of light-emitting diodes to scan graphics. The device comprises a LED array, a graphic data memory unit and a scanning control and processing unit which is connected with the LED array and the graphic data memory unit. The scanning control and processing unit can be used for controlling the light receiving and emitting group which consists of at least two LEDs on the LED array to scan graphics. In one scanning process of the light receiving and emitting group, one or more LED in the group, namely, receiving LED, can be charged firstly, and then the left one LED, namely an emitting LED, can be controlled to glow and to stop charging the receiving LED; and the discharging time of the receiving LEDs can be detected. After the discharging time detected in the scanning process is converted into the grayscale value of graphic blocks, and then the grayscale value of graphic blocks is stored in the graphic data memory unit. With simple circuit and low cost, the invention can realize the scanning and storing of graphics.

The invention relates to a mine chute material level measurement method based on a small unmanned aerial vehicle and a visualization method. The method comprises following steps: air pressure of multiple points whose height is known is measured by a barometer with a temperature compensating function, and an approximate linear relationship curve of the air pressure inside the chute and height is fitted according to the measured data; the unmanned aerial vehicle flies downwards from the top ground plane of the chute and the unmanned aerial vehicle approaches the up side of the material level and is kept hovering; the material level value is calculated according to the signals of the barometer; the complete well wall micro laser ray scanning data and surface image information are obtained; the scanning data and the surface information are reconstructed and visualized for check. The method has the advantages such as easy measurement of material level, flexible and wide application range.

The invention provides a laser beam expanding lens system, comprising a laser, lenses and a oscillating lens, wherein, the two lenses are located at the same optical axis; the first lens is a double concave lens, and the curved surface backs the incident direction of the light; the second lens is a meniscus-type lens, and the curved surface faces the incident direction of the light; the first lens is the beam expanding lens; through arranging the meniscus-type lens and the double-concave lens, and through adjusting the distance between the lens as the precision adjustment light beam, the emitted light beam is lead to display light beam with clear light, in order to meet different needs. The laser beam expanding lens system is used as advertisement demonstration, stage demonstration and other occasions, therefore, the invention is widely used, the scanning of the laser beam expanding lens system is flexible, and patterns of various colors and designs can be rapidly weaved through the oscillating lens.

The invention relates to an integrated mechanism used for paper scanning, number rubbing and arrangement. The integrated mechanism used for paper scanning, number rubbing and arrangement comprises a central control mechanism as well as a scanning mechanism, a number rubbing mechanism and a paper arrangement mechanism which are in communication connection with the central control mechanism separately, wherein the scanning mechanism comprises a scanning platform, a scanning device and a paper conveying device I conveying paper on the scanning platform; the number rubbing mechanism comprises a number rubbing platform, a number rubbing device and a paper conveying device II conveying paper on the number rubbing platform; and the paper arrangement mechanism comprises a flow guide device I and apaper conveying device III, a flow guide plate on the flow guide device I is connected with a paper number rubbing outlet in the number rubbing platform and a paper receiving port in the paper conveying device III, the paper conveying device III comprises a paper receiving box freely sliding under the control of a paper conveying module, and a paper receiving port is formed in the paper receivingbox. The invention provides an integrated mechanism used for paper scanning, number rubbing and arrangement.

The invention discloses an MCU capable of driving multiple groups of RGB lamps and a driving method thereof, which are used for flexibly driving the multiple groups of RGB lamps on the MCU. The method comprises the steps of setting a blanking timer and an interrupter, triggering the interrupter when a display driving period is ended, outputting the pins of a closing column of a hardware, starting timing by the blanking timer, executing an interruption software to load the PWM wave data of a column pin driving signal corresponding to the next row of lamp effect; and when a blanking period is finished, using the hardware to synchronously start all the PWM modules to work, and entering the next display driving period; in the display driving period and the blanking period, enabling the PWM wave modules and the blanking timer to work continuously in turn. According to the present invention, the next row of PWM wave data is loaded by fully utilizing the blanking period, the synchronous driving problem of the pins of the RGB lamps is solved, the driving time and data can be configured to each round of scanning more flexibly under the condition that the driving effect is not influenced at all, the requirement for the size of a buffer area is extremely low, a hardware circuit is simpler, and the cost is lower.

The invention discloses a small reflective off-axis telemetry calibration system for an FTIR front end. The small reflective off-axis telemetry calibration system comprises a diaphragm, a first off-axis parabolic mirror, a plane mirror, a second off-axis parabolic mirror, a third off-axis parabolic mirror, a black body, an FTIR spectrometer, a vertical turntable bearing, a lens cone, a top cover and a horizontal turntable bearing. The off-axis reflection type telescopic light path is adopted, compared with a common cassette telescope for FTIR telemetry, aperture blocking does not exist, the energy utilization rate is higher, and the detection limit of passive telemetry can be effectively improved; spatial layout is adopted, only the telescope objective is required to rotate and pitch when the instrument is used for 360-degree horizontal and 60-degree pitch scanning, the scanning is flexible, and the speed is high; the FTIR spectrometer is kept still, and the measurement stability is better; the size and the weight are reduced, the shock resistance is improved, and the system is better applied to vehicle-mounted and airborne conditions; the telescopic optical path and the black body calibration optical path are carried out in a time-sharing manner, and the off-axis design is adopted, so that the energy utilization rate of passive remote measurement can be effectively improved.

The invention discloses a type-B ultrasonic scanning probe, a type-B ultrasonic scanning system and a type-B ultrasonic scanning method. The type-B ultrasonic scanning system comprises the type-B ultrasonic scanning probe and an upper computer, the type-B ultrasonic scanning probe comprises a body, the body is internally provided with a type-A ultrasonic scanning probe, an attitude sensor, an image displacement sensor and a controller, the collecting end of the image displacement sensor and the detecting end of the type-A ultrasonic scanning probe are both arranged on the front end face of the body, the type-A ultrasonic scanning probe, the attitude sensor and the image displacement sensor are all connected with the controller, and the controller receives data collected by the type-A ultrasonic scanning probe, the attitude sensor and the image displacement sensor and sends the data to the upper computer; the data collected by the type-A ultrasonic scanning probe, the attitude sensor and the image displacement sensor are combined by the upper computer to form an image. The type-B ultrasonic scanning probe and the type-B ultrasonic scanning system are low in hardware price, a person can conveniently purchase and use the type-B ultrasonic scanning probe and the type-B ultrasonic scanning system, responses are sensitive, the collected data are accurate, the type-B ultrasonic scanning method is completed with the hardware, and scanning can be flexibly carried out.

A fast tester for measuring the concentration of blood sugar is composed of light source, crystal, amplifier, optical fibre, probe, signal amplifier, CPU, driver, phase locked loop consisting of said driver, phase discriminator, voltage-controlled oscillator and frequency N-divider, and the current-power amplifying output circuit consisting of pre-amplifier, power amplifier and RF output interface. In the driver there is an intelligent phase locked loop consisting of adder, D / A converter and microprocessor.