34results about How to "Small anti-interference ability" patented technology

The invention provides a UUV (Unmanned Underwater Vehicle) path tracking method based on self-adaption sliding-mode control. The method comprises the steps of 1, initializing; 2, obtaining a current state of a UUV; 3, establishing an underactuated UUV horizontal error equation to obtain the positional deviation xe, ye and a course deviation value psi e; 4, utilizing a sliding-mode control method to respectively design a speed sliding-mode control law, a position sliding-mode control law and a stem phase angle sliding-mode control law and enabling th ud to be zero, the xe to be zero and the psi e to be zero by controlling thrust Xprop, expected speed (shown in the following image) and torque Nprop; 5, updating a self-adaption law of handover gain and a self-adaption law of boundary layer thickness; 6, performing control input saturation compensation; 7, enabling k = k +1, returning to the step 2 and updating the control laws and the self-adaption laws for the next time to achieve the accurate control on the UUV horizontal path tracking. The UUV path tracking method can only depend on a controller which is designed according to a horizontal dynamical model to stabilize the system and is suitable for various underactuated UUVs.

The invention relates to a low-power consumption portable electrocardiograph monitor and a control method thereof, which belongs to the field of medical appliances. The portable electrocardiograph monitor comprises an electrocardiosignal collection unit, an electrocardiosignal analysis and storage unit and an upper computer. The control method comprises the following steps of: step 1: carrying out digital filtering to collected signals by using a wavelet entropy optimal threshold denoising method; step 2: carrying out rejection of baseline drift to the signals processed by step 1 by using a morphological filtering method; and step 3: carrying out disease classification to the signals processed by step 2 by using a support vector machine algorithm. The invention has the advantage of high integrity, and has the characteristics of portability, compactness and economy.

The invention relates to a watertight door device which is characterized by comprising a door frame, a door plate, a hydraulic power system and a control system. The door frame is connected with the door plate by a hinge, linkage of a closed/open hydro-cylinder and a locked/loosened hydro-cylinder is employed to automatically perform the motions of closing-locking and delocking-opening; the control system is composed of a plurality of regional control cabinets and a centralized-control box, and can carry out centralized monitoring on the state of the watertight door device and remotely or locally control opening and closing. Compared with the traditional manual type watertight door, the watertight door device provided by the invention not only reduces heavy physical strength dissipation, but also is stable and simple in operation and high in safety and reliability. Meanwhile, compared with the traditional hydraulic sliding type watertight door, the watertight door device is compact instructure, light in weight and small in occupied space.

The invention discloses an inductive elevator operating panel, and belongs to the technical field of elevator accessories. The inductive elevator operating panel comprises a detection unit, a control unit and a simulating key panel, wherein the detection unit is mounted on the inner top wall of a cage and is electrically connected with the control unit; the control unit is electrically connected with an elevator running circuit; the simulating key panel is arranged on the inner side wall of the cage; the detection unit is a TOF photoelectric sensor and is used for acquiring a key operating signal on the simulating key panel and transmitting the key operating signal to the control unit; the control unit controls the elevator running circuit to carry out a corresponding operation. The inductive elevator operating panel has the advantages as follows: the TOF photoelectric sensor and the simulating key panel are coordinated to simulate multiple columns of operating areas on the inner side wall of the cage, so that conventional mechanical buttons can be replaced, the problem of aging of mechanical components can be avoided, mounting and debugging of the panel and wiring of the circuit are simplified and the cost is reduced; the inductive elevator operating panel is good in anti-jamming capability, is slightly affected by the environment, and is high in reliability, good in sensitivity and long in service life.

An optical switch of 2X2 monolithic crystal suitable for optical internet and optical computing fields applies a crystal of long parallel hexahedron in the middle of which set a pair of electrodes along the crystal light shaft to make up a photoelectric modulation region in the middle of the crystal. The photoelectric modulation region from the crystal beam input face to the middle position is the light beam joining region and the light splitting region is from behind the photoelectric modulation region to the crystal optical beam output face, so as to realize three functions of input beam polarizing, deflection and beams joining, output beam polarizing, deflection and bean splitting and photoelectric modulation, integrating basic performance necessary for 2X2 optical switch.

The invention relates to an aerial photographing type rotor craft control system. According to the technical scheme, an ARM system module (2) is connected with a wireless transmission module (1), a gyro module (3), a barometer module (4), a GPS positioning module (5), an LED module (6) and a motor module (7); the ARM system module (2) is internally provided with control software of the craft control system. The control software and hardware of the craft control system act together, and the aerial photographing type rotor craft control system has the advantages of being good in anti-interference performance, high in bearing ratio, good in stability and high in gyroscopic effect resistance. The aerial photographing type rotor craft control system is suitable for being used for high altitude shooting and low altitude shooting equipment in various industries.

The invention discloses a method of selectively detecting thrombin by a phosphorescent probe. The phosphorescent intensity of a system is recovered as Mn doped ZnS phosphorescent quantum dots coated by MPA and a thrombin adapter are mixed with surfaces, far from the quantum dots, of TBA in a quenching system because of relatively high specificity combination between a thrombin adapter (TBA) and thrombin. Related to the phosphorescent quantum dots, the phosphorescent quantum dots are applied more widely in detection as the phosphorescent service life is long, interference of autofluorescence and scattered light can be avoided, the selectivity is high, no deoxidant and inductor are needed to be added during detection and the like. The phosphorescent quantum dots and TBA are not modified, sothat the synthetic steps are simplified to a great extent, and meanwhile, the experimental cost is also lowered. The method is high in accuracy and high in sensitivity, and has a very good applicationprospect in detection of an actual sample.

The invention discloses an ultra-low-speed high-precision positioning control method of a frameless torque motor. The method mainly comprises the following steps: 1) adjusting the absolute position ofthe motor to zero; 2) calculating a mechanical angle theta<m> which should be rotated by the motor, an electrical angle theta<e> which should be rotated by the motor, a real-time position theta<1eal>of the motor and a real-time rotating speed omega<r> of the motor; 3) adjusting the angle of the rotor to theta<e>; 4) updating the exciting current i<d> according to the feedback rotating speed x<real> of the encoder and the rotating speed fluctuation requirement; and calculating the difference between the given reference value theta<tar> and the feedback value of the encoder to obtain a reference positioning offset, updating the reference value of the target position, and returning to the step 2 until the reference value of the target position is not updated any more. According to the invention, high torque can be maintained under the working condition of ultra-low-speed operation, and the anti-interference capability is excellent.

The invention provides an organic silicone Schiff base fluorescent probe. The chemical structural formula is shown. The above fluorescent probe can be obtained by reacting aminopropyldisiloxane with 4-diphenylaminobenzaldehyde. The fluorescent probe can be used for detecting Cr6+ in a solution, cells or organisms. The probe has high high emission quantum yield, radiation resistance, corrosion resistance, strong ability to penetrate the cell membrane, excellent biocompatibility, strong anti-interference ability and little influence by environmental changes. The fluorescent probe can be synthesized by 'one-pot method', the synthesis process is simple and easy, the raw materials are cheap and easy to obtain, the preparation cost is low, and the promotion is easy.

The invention discloses an airborne vibration signal processing method for a large-bypass-ratio turbofan engine, and the method comprises the steps: 1, monitoring a rotating speed high-tooth signal, and calculating a high-tooth signal period at a current moment according to the rotating speed; step 2, in a high-tooth signal period, collecting and marking the point number of the collected vibration signal data, and marking vibration signals in the high-tooth signal period; 3, according to the A/D sampling frequency and the frequency resolution, the number of vibration points needed by cubic spline interpolation of the collected vibration signals in the high-tooth signal period is calculated, and a sampling point number sequence of the vibration signals is obtained; 4, filtering high-frequency components of the sampling point number sequence of the vibration signals through a low-pass filter, and obtaining a filtering point number sequence of the vibration signals after filtering; and step 5, performing cross-correlation processing on the filtering point number sequence of the vibration signal to obtain the amplitude and the phase of the vibration signal in a high-tooth signal period.