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57results about How to "Guaranteed catch" patented technology

Space-based spatial moving target tracking pointing satellite attitude control method and system

ActiveCN109911248AGuaranteed catchAvoid angular difference operationsSpacecraft guiding apparatusQuaternionAngular velocity
The invention provides a space-based spatial moving target tracking pointing satellite attitude control method and a space-based spatial moving target tracking pointing satellite attitude control system. The space-based spatial moving target tracking pointing satellite attitude control method comprises the following steps: S1, acquiring the satellite orbit state, the attitude quaternion, the angular velocity and the spatial moving target orbit state at the current time; S2, enabling a spatial moving target to acquire the attitude quaternion and the three-axis spatial unit vector of a satellitebody coordinate system under an expected satellite attitude in a view field of a satellite camera; S3, acquiring a time derivative of the three-axis spatial unit vector of the satellite body coordinate system under the expected satellite attitude; S4, according to the three-axis spatial unit vector of the satellite body coordinate system under the expected satellite attitude and the time derivative of the unit vector, calculating the expected angular velocity; S5, according to the expected angular velocity under the expected satellite attitude and the attitude quaternion, calculating the control torque of a satellite and adjusting and controlling the attitude of the satellite according to the control torque. Capture for the moving target in the view field of the camera is guaranteed to the maximum extent. The space-based spatial moving target tracking pointing satellite attitude control method and the space-based spatial moving target tracking pointing satellite attitude control system are applied to the field of space-based attitude sensing.
Owner:湖南航升卫星科技有限公司

Maximum wind energy capturing method for double-feed type wind generating set

The invention discloses a maximum wind energy capturing method for a double-feed type wind generating set in the field of wind power generation. A BP neural network model with the air speed value, the air direction value and the wind wheel rotating speed value as the input quantity and the electromagnetic torque value as the output quantity is constructed, the expected theoretical optimal air wheel rotating speed value is calculated according to a tip speed ratio point formula, the expected theoretical optimal air wheel rotating speed value is substituted into the BP neural network model to determine the initial control quantity of the electromagnetic torque value initial control quantity, a step-length-changing climbing search method is adopted, the changed step length of the electromagnetic torque value is reduced along with rising of the control period number, the electromagnetic torque value is changed in a small range so that the maximum power value point can be found, the real-time generator rotating speed value is measured in real time before each time of search, when the changed value of the generator rotating speed value exceeds the limiting value compared with the initial generator rotating speed value generated when the whole search is started, the search is started again, and when the absolute value of the difference value of the generator rotating speed values or the power generating power values in two adjacent control periods is smaller than the limiting value, the search is over. The maximum wind energy capturing method has the advantages that overlong periods or oscillation is avoided in the climbing search, and the maximum power capturing is ensured.
Owner:SHANGHAI ELECTRICGROUP CORP

Correlation filtering tracking algorithm based on fusion features and self-adaptive updating strategy

The invention relates to a correlation filtering tracking algorithm based on fusion features and a self-adaptive updating strategy. A tracking method based on correlation filtering is adopted, and a robust target model is constructed by using sub-channel fusion features to predict the central position of a target. For the problem that a target is severely shielded, a self-adaptive model updating mechanism is introduced to solve the problem that firstly, the reliability degree of a current response graph is judged according to a confidence coefficient threshold value, and the higher the reliability degree is, the lower the possibility that the target in the image is shielded is. Constructing a self-adaptive updating function on the basis, updating the tracking model according to the function, ensuring that the model is updated at a very low learning rate when the target is severely shielded, and introducing noise as little as possible. When the appearance of the target is clear and interference factors such as shielding deformation do not exist, the model is updated at a very high learning rate, and it is guaranteed that the model can capture the latest target characteristics. By means of the measures, a very robust tracking result can be obtained under different challenging scenes.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method for suppressing pulse modulation continuous wave interference of notch filter assisted by variable gain amplifier

ActiveCN109358347AImprove loop anti-interference abilityImprove the signal carrier to noise ratioSatellite radio beaconingCarrier signalPhysics
The invention provides a method for suppressing the pulse modulation continuous wave interference of a notch filter assisted by a variable gain amplifier. The method comprises the following steps of:filtering input mixed signals by the notch filter; performing carrier wave stripping on filtered mixed signals, and respectively mixing the mixed signals with sinusoidal carrier wave replica signals and cosine carrier wave replica signals to obtain mixing results I

(t) and Q

(t); performing amplitude detection on the filtered mixed signals, and outputting a corresponding compensation coefficient Gain by the variable gain amplifier according to an amplitude detection result; compensating the mixing result I

(t) to obtain a compensated mixing result I<Pamp>(t); and evaluating and outputting the actual value A(t) of a filtered and compensated signal amplitude according to Q

(t) and I<Pamp>(t). According to the method for suppressing the pulse modulation continuous wave interference ofthe notch filter assisted by the variable gain amplifier, a traditional notch filter is assisted by the variable gain amplifier to achieve effective suppression for pulse modulation continuous wave interference, and can compensate for lost useful signals, which provides a basis for subsequent high-precision tracking and positioning.

Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Automatic mounting mechanical arm for production line

The invention discloses an automatic mounting mechanical arm for a production line. The automatic mounting mechanical arm for the production line comprises an arm paw, a transmission frame, a mountingseat, a supporting plate and a hydraulic pump; the transmission frame is arranged below the arm paw in parallel; the mounting seat is mounted at one end of the transmission frame; the rectangular supporting plate is arranged below the mounting seat in parallel; and a first motor is arranged below the centre of the supporting plate. The automatic mounting mechanical arm for the production line hasthe beneficial effects that the mechanical arm has higher automation degree on production mounting; a third motor drives the mounting seat to rotate through a sleeve shaft so as to quickly adjust thefixing position where a product is screwed by a screw driver on the mounting seat; the hydraulic pump drives the arm paw and the mounting seat to move up and down through a hydraulic post so as to adjust the height of the product grabbed by a paw hook on the arm paw and the height position of the product mounted by the mounting seat; on one hand, higher product mounting efficiency of the mechanical arm is ensured; and on the other hand, the gripping, transporting and mounting of mechanical arm to the products with different sizes and shapes can be ensured, so that the universality of adaptation is ensured.
Owner:重庆智能电控技术有限责任公司

Escalator speed and reversal detection method and device based on rotary encoder

The invention discloses an escalator speed and fault detection method and device based on a rotary encoder and relates to the field of escalator speed measurement and reversal detection. The method comprises the following steps that 1), the state of the rotary encoder is monitored at startup to determine whether an escalator is running or not, and if yes, the self-learning is started, and the second step is executed; and if not, the process ends; 2), an A-phase signal and a B-phase signal of the rotary encoder are acquired, and statistic of the pulses of the rotary encoder is performed; and 3), whether the escalator reversal exists or not is judged according to the acquired signal, and if yes, the escalator is stopped; and if not, the escalator speed is calculated by the adoption of an interrupting mode according to the pulses. The device comprises an acquisition circuit, a filter circuit and a single chip microcontroller. The acquisition circuit comprises a rotary encoder signal acquisition unit, an amplifying unit and a strong and weak electricity conversion unit. The escalator speed and fault detection method and device solve the problem that the rotation direction is measured by the adoption of a rotary encoder, and difficult capturing is caused by the microsecond class time in the prior art, capturing of the microsecond-class A-phase signal and the microsecond-class B-phase signal is achieved, and therefore the effect of measuring the rotation direction is achieved.
Owner:中景恒基云端物联网科技成都有限公司

Earth sound event positioning method and instability disaster early warning method thereof, earth sound sensor, monitoring system and readable storage medium thereof

The invention discloses an earth sound event positioning method and an instability disaster early warning method thereof, an earth sound sensor, a monitoring system and a readable storage medium thereof, and the earth sound event positioning method considers the arrival time, time domain parameters, frequency spectrum information and waveform shape of an earth sound signal when a wave generated by an earth sound event source reaches any monitoring point, then the non-uniformity of a propagation medium is comprehensively reflected, and the inversion precision of earth sound event positioning is finally improved. According to the instability disaster early warning method, precursor information of disaster instability is comprehensively considered from different dimensions, and an earth sound instability disaster early warning means with applicability, timeliness and low failure rate is constructed according to the change trend of precursor factors; according to the earth sound sensor provided by the invention, integration of signal acquisition and processing is realized; the collected earth sound signals are subjected to micro signal enhancement, filtering fidelity and other processing, the anti-interference capability is effectively improved, and multi-band effective earth sound signals are perceived.
Owner:CENT SOUTH UNIV

A method for capturing maximum wind energy of double-fed wind turbines

The invention discloses a maximum wind energy capturing method for a double-feed type wind generating set in the field of wind power generation. A BP neural network model with the air speed value, the air direction value and the wind wheel rotating speed value as the input quantity and the electromagnetic torque value as the output quantity is constructed, the expected theoretical optimal air wheel rotating speed value is calculated according to a tip speed ratio point formula, the expected theoretical optimal air wheel rotating speed value is substituted into the BP neural network model to determine the initial control quantity of the electromagnetic torque value initial control quantity, a step-length-changing climbing search method is adopted, the changed step length of the electromagnetic torque value is reduced along with rising of the control period number, the electromagnetic torque value is changed in a small range so that the maximum power value point can be found, the real-time generator rotating speed value is measured in real time before each time of search, when the changed value of the generator rotating speed value exceeds the limiting value compared with the initial generator rotating speed value generated when the whole search is started, the search is started again, and when the absolute value of the difference value of the generator rotating speed values or the power generating power values in two adjacent control periods is smaller than the limiting value, the search is over. The maximum wind energy capturing method has the advantages that overlong periods or oscillation is avoided in the climbing search, and the maximum power capturing is ensured.
Owner:SHANGHAI ELECTRICGROUP CORP

Secure transmission system for broadcast automatic monitoring information

Implementation method of ADS-B information security transmission: (1) Construct a three-level vertical management system according to the air traffic control center, flight information region, and the control area to which the flight information center belongs. The lowest layer is the ADS- User B, ADS-B users and their control area servers communicate with each other using an independent two-way authentication mode; (2) ADS-B users are at the beginning of the planned route safety period, and the air traffic control center assigns a temporary ADS-B user to the ADS-B user Identity, and establish a mapping relationship from temporary identity to real identity, and send the mapping relationship to the management department of the flight information region that the ADS-B user plans to pass through; before the ADS-B user takes off, the management department of the control area will The user's temporary identity in the server, the two-factor symmetric key, and the server identification code of the ground server near the user's planned route and the public key information of the server message authentication code are secretly distributed to the ADS-B user. The invention can effectively resist various active attacks, realize safety authentication, and ensure the safety of ADS-B information transmission.
Owner:AVIATION DATA COMM +2

Wall-mounted face recognition device based on multi-directional angle adjustment of artificial intelligence system

The invention discloses a wall-mounted face recognition device based on multi-directional angle adjustment of an artificial intelligence system. The device comprises a fixed seat plate, a camera and afingerprint identifier; an outer shell is arranged on the outer side of the fixed seat plate; the outer side of the outer shell is connected with a cover plate; a fixed inserting rod is fixed above the outer side surface of the fixed seat plate; a connecting rod is connected to the lower portion of the outer side face of the fixed seat plate, a mounting groove is formed in the back of the outer shell, a small telescopic rod is mounted on the inner side of the mounting groove, a side plate is fixed in the outer shell, a central processing unit with a keyboard is arranged below the camera, anda fingerprint identifier is arranged on the rear side of the central processing unit with the keyboard. The wall-mounted face recognition device based on multi-directional angle adjustment of the artificial intelligence system is convenient to install, can be adjusted, is convenient to guarantee the stability of portrait capture, is convenient to collect temperature and fingerprints, can guaranteethe accuracy, and can detect the state of personnel at the same time.
Owner:永恒梦境虚拟现实科技(南京)有限公司

Liquefaction prevention method of offshore wind power jacket liquefaction prevention suction cylinder device

The invention relates to a liquefaction prevention method of an offshore wind power jacket liquefaction prevention suction cylinder device. The suction cylinder device comprises a plurality of suction cylinder bodies arranged on the periphery of the lower end of a jacket, wherein a plurality of vertically distributed first pressure sensors are arranged on the outer side end faces of the suction cylinder bodies, a plurality of second pressure sensors are arranged at the lower end positions of the suction cylinder bodies, drainage holes communicating with a cavity are formed in the upper ends of the suction cylinder bodies, an extrusion assembly is arranged at the upper end position of the inner side of the cavity, a plurality of conduction pipes are arranged in the suction cylinder bodies, one ends of the conduction pipes are located at the upper end position of the inner side of the cavity, the other ends of the conduction pipes are located at the lower end positions of the suction cylinder bodies, and vacuum pumps are connected to the conduction pipes. The liquefaction prevention method has the following beneficial effects that efficient and rapid liquefaction prevention under the limit environment is achieved, and therefore the building stability of the jacket is guaranteed.
Owner:NANTONG BLUE ISLAND OFFSHORE CO LTD

Facial and identity card recognition integrated machine with indoor high-efficient recognition

The invention discloses a facial and identity card recognition integrated machine with indoor high-efficient recognition, and belongs to the field of verficaition devices. A technical scheme is as follow: that facial and identity card recognition integrated machine comprises a machine body, an ID card recognition area, a face camera and a height detector. The ID card recognition area is fixedly connected with the middle of the front end of the airframe, the face camera is rotatably connected with one side of the airframe, and the height detector is mounted on the other side of the airframe, wherein, a motor is fixedly connected with the machine body; and an output end of the motor is rotatably connected with the face camera; A height detector comprises a photoelectric sensor and a receiver, wherein that receive is in a square plate shape, the receiver is fixedly connected on the side of the body away from the face camera, the receiver is vertical in the length direction, a plurality ofphotoelectric sensor are fixedly connected on the receiver at intervals, and the length of the photoelectric sensors is the same as the width of the receiver; Single-chip microcomputer is connected with motor, photoelectric sensor and receiver at the top of the body, which has the advantages of facial recognition for people of different heights.
Owner:天津苍洱科技有限公司
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