151results about How to "Simple principle" patented technology

A method for detecting and quantifying impairments of a received communication signal of a QAM data communication system represented by a plurality of ideal values. The method includes storing a statistically significant number of a plurality of received points of the signal for each ideal value corresponding to a plurality of groups of said plurality of ideal values. The received points are defined by an in-phase and a quadrature components in a coordinate system in which a first axis is the in-phase axis and a second axis is a quadrature axis. The components have corresponding ideal components from their respective ideal value. Each group corresponds to respective impairments and is specific to the same.

Disclosure is a method for detecting the safety driving state of a driver, the method comprises the following steps: (a) detecting the current sight direction of a driver in real time and acquiring a scene image signal in a front view field of the driver when a vehicle runs; (b) processing the acquired current road scene image signal according to a visual attention calculation model to obtain the expected attention distribution of the driver under the current road scene; and (c) performing fusion analysis on the real-time detected current sight direction of the driver in the step (a) and the calculated expected attention distribution of the driver in step (b), and judging whether the current driver is in a normal driving state and whether the driver can timely make a proper response to the sudden road traffic accident. The device is used for implementing the method and has the advantages of simple principle, easy realization, direct reflection of the real driving state of a driver, and improvement of the driving safety.

The invention discloses an underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device, which is arranged on the inner wall of a drilled hole or a sleeve and consists of a packer system, a liquid sample inlet system, a gas sample inlet system, an automatic multi-way valve, a sampling system, a temperature control system, and an external pressure / flow control system, wherein a thermal-insulation layer or temperature control system covers the outside of the entire sampling device. The device accurately controls the layer under ground fluid sampling positionto realize gas and liquid fluid sampling at different layer positions of a stratum, ensures the temperature and pressure in a sampling process are consistent with those of the underground fluid, and improves the pressure and temperature-retaining degree of the fluid in the sampling process. The principle of the device is simple, the parts are assembled simply and the device is suitable for multilayer sampling in a drilled well and underground gas-liquid two-phase fluid sampling.

The invention relates to a micro friction measurement device, and belongs to the technical field of micro force measurement. By adjusting a fine tuning knob on a lifting platform, loading normal load is realized. Resistance strain gages are adhered to front and back surfaces of an elastic element, form a Wheatstone bridge through leads, so as to indirectly measure the normal load. Two fixed pole plates and a moving pole plate form a differential capacitive sensor; the two fixed pole plates are fixed on the lifting platform through supporting rods; the moving pole plate is connected with a detachable connecting block through a connecting piece; when a servo motor is operated to drive a ball screw, to enable a sample stage to perform linear motion, the connecting block suffers frictional force, a small displacement in the horizontal direction can occur, and the polar distance between the pole plates can be changed, therefore, the capacitance of the capacitive sensor is changed, and the friction measurement is realized. The micro friction measurement device has a simple structure, can realize force loading without a high-precision placement platform, improves the measurement sensitivity, greatly reduces the linear error, and has a good effect on measuring micro force, such as friction force and the like.

Provided is a micro fluidic device that can control a flow time of micro fluid by using a capillary phenomenon. The micro fluidic device includes: a flow channel for flowing fluid, the flow channel being formed between a top substrate and a bottom substrate or between a top substrate, a bottom substrate, and a middle substrate; a flow blocking surface for stopping a flow of the fluid in the flow channel temporarily; and a hump for delaying the flow formed in the line of continuity with the flow blocking surface. The micro fluidic device of the present research can control the flow time in a simple manner.

The present invention provides a maximum power point tracking method and device and a photovoltaic power generation system. The maximum power point tracking method comprises: sampling present voltage and present current of a photovoltaic array; obtaining present power based on the present voltage and the present current; using difference between the present power and power for previous sampling time as present perturbation power, and based on ratio of the present perturbation power to perturbation power for previous sampling time, obtaining gradient perturbation voltage step ratio; obtaining perturbation voltage step based on the gradient perturbation voltage step ratio and voltage difference between the present voltage and the voltage for previous sampling time; and controlling output voltage based on the perturbation voltage step.

The invention discloses a mower, belongs to the field of green environment-friendly equipment and mainly solves the problem that the existing mower is large in size, complex in structure and energy-wasting. The mower comprises a frame, a power input mechanism, a primary pulley drive speed-up mechanism, a secondary pulley drive speed-up mechanism, a crank-slider motion conversion mechanism and a mowing mechanism. The mower is powered by manpower driving wheels to rotate. The power input mechanism inputs the power, angular speed is greatly increased after the power passes the primary pulley drive speed-up mechanism and the second pulley drive speed-up mechanism, the angular speed is converted into reciprocation of moving blades by the crank-slider motion conversion mechanism, and the moving blades act with fixed blades to mow grasses. The mower is simple in structure, small in size, low in cost, convenient to use, energy-saving and body-building.

The invention relates to a laguerre-gaussian beam-based speckle contrast imaging measurement device and a laguerre-gaussian beam-based speckle contrast imaging measurement method. The device comprises a continuous wave laser; after being reflected by a total reflective mirror, a light beam emitted by the continuous wave laser irradiates on a collimating beam expander; after that, the light beam becomes linearly polarized light by a polarizer and then irradiates on a beam splitting prism; after passing through the beam splitting prism, the light beam is divided into two beams, wherein one path is reflected light, and the other path is transmission light; the reflected light beam irradiates on a spatial light modulator, and the light beam reflected by the spatial light modulator irradiates on a diaphragm after passing through the beam splitting prism and an analyzer again; after passing through the diaphragm, the light beam irradiates on a sample to be tested; after being scattered by the sample to be tested, the light beam is converged by an imaging lens, and then an image is formed in a charge coupled device (CCD) camera; after that, the image is stored in a computer, and the image contrast value can be calculated; when a light path is difficult to adjust, the speckle size is adjusted by changing the characteristics of the illumination beam, so that the method has the characteristics of being flexible and reliable; the method is widely applied to the fields such as hemorheology monitoring, plant growth condition monitoring, etc.

The invention belongs to the field of well drilling of oil and natural gas and relates to a vibration absorption type downhole hydraulic pulse generation device and a well drilling method thereof. The device comprises a drill column linkage body and a drill column transfer body. The device is capable of effectively carrying out periodic compression pressurizing on all downhole drilling fluid, achieving vibration energy transfer of a drill column and generation of pulse jets, and achieving pulse jet modulation of downhole jet flows. Besides, pulse amplitude is high, the principle and the structure are simple, and production, maintenance and application are easy. According to the well drilling method, the pulse generation device is utilized to transfer energy generated by vibration of the drill column, energy generated by vibration of the drill column is effectively utilized, generation of pulse jets is achieved, and drilling speed is high.

The invention discloses a detection method and device for a speed and a displacement of a rail train. The method comprises the steps: 1) acquiring a ground motion image in real time when the train runs, and calculating a displacement of two adjacent-frame images; and 2) calculating a moving speed of the current ground image according to the displacement and an acquired time interval between the two adjacent-frame images, obtaining a current train speed through a calculation according to a function relationship between the train speed and the moving speed of the ground image, and accumulating displacement data obtained through the calculations before the current time to obtain a current train displacement. The device comprises an image acquisition and processing for acquiring the ground motion image in real time and calculating the displacement between the two adjacent-frame images, and a data processing module for calculating the speed and the displacement of the current train according to the displacement and the acquired time interval between the two adjacent-frame images. The method and device have the advantages of the simple principle and operation, the rapid detection speed, high detection precision and the wide application range.

Disclosure is a method for detecting the safety driving state of a driver, the method comprises the following steps: (a) detecting the current sight direction of a driver in real time and acquiring a scene image signal in a front view field of the driver when a vehicle runs; (b) processing the acquired current road scene image signal according to a visual attention calculation model to obtain the expected attention distribution of the driver under the current road scene; and (c) performing fusion analysis on the real-time detected current sight direction of the driver in the step (a) and the calculated expected attention distribution of the driver in step (b), and judging whether the current driver is in a normal driving state and whether the driver can timely make a proper response to the sudden road traffic accident. The device is used for implementing the method and has the advantages of simple principle, easy realization, direct reflection of the real driving state of a driver, and improvement of the driving safety.

This invention discloses one method and device to prevent automobile move back on slope, which fixes one single direction locking device on low speed gear or reverse gear to make the car main axis only rotate forward when in low speed gear with its reverse direction locked up to prevent the moving back when climbing up the slopes or sliding forward.

The invention discloses a method for preparing battery-grade iron phosphate and manganese phosphate from manganese ore leaching residues, which comprises the following steps: adding dilute sulphuric acid into the manganese ore leaching residues to obtain a ferromanganese leaching solution, and adding a reducing agent into the ferromanganese leaching solution to obtain a mixed solution of ferrous sulfate and manganese sulfate; adding sulfide into a mixed solution of ferrous sulfate and manganese sulfate to obtain a mixed purified solution of ferrous sulfate and manganese sulfate, adding an oxidizing agent into the mixed purified solution of ferrous sulfate and manganese sulfate to oxidize ferrous sulfate into a ferric sulfate solution, adding phosphoric acid or phosphate into the mixed purified solution of ferric sulfate and manganese sulfate, and adding a pH regulator to regulate the pH of the purified solution at the same time; and obtaining the battery-grade iron phosphate precipitate and the manganese phosphate precipitate. According to the method, the problems that resources are wasted and the environment is polluted due to the fact that the resources of the existing manganese ore leaching residues cannot be fully utilized and recycled are solved, and the battery-grade iron phosphate and the battery-grade manganese phosphate are prepared from manganese and iron elements in the manganese ore leaching residues through a vulcanization impurity removal method and a phosphate coprecipitation method.

The present invention discloses a structural light-based airport runway foreign body detection system. The system includes a detection vehicle as well as a line laser module, an image acquisition module and a computer control and processing module which are all mounted on the detection vehicle; the line laser module is mounted at the rear end of the detection vehicle and projects a structural light plane to the surface of a runway with a certain attitude so that the structural light plane can form a structural light strip; the image acquisition module is located at the rear end of the test vehicle and is located at the same plane with the line laser module, wherein the plane is perpendicular to the surface of the runway; the image acquisition module acquires the light strip image of the surface of the runway with a certain attitude and transmits light strip image data to a computer; and the computer control and processing module is located inside the detection vehicle, controls the image acquisition module to acquire the light strip image of the surface of the runway, and processes the light strip image data in real time through related software and judges whether a foreign body exists on the runway.

The invention discloses an electronic lock capable of detecting the rotating direction of a lock cylinder and a working method for the electronic lock. The electronic lock mainly comprises a lock body and the lock cylinder, wherein a rotating shaft of the lock cylinder is fixedly provided with at least one convex key; at least one position sensor is arranged at a position, corresponding to the convex key, of the lock body; a rocker arm is arranged close to the position sensor on the lock body, and points to the direction of the rotating shaft of the lock cylinder, and the rocker arm is pushed by the convex key when the rotating shaft of the lock cylinder is rotated so as to swing to two sides and trigger the position sensor. According to the electronic lock disclosed by the invention, the rotating direction of the lock cylinder is detected by matching the convex key, the position sensor and the rocker arm, the unlocking or locking state of the lock cylinder is judged based on the structure, and the electronic lock has the advantages of simple structure, low cost, flexible implementation method, high reliability and the like.

The present invention relates to measuring devices used in measuring acceleration, and, more specifically, to capacitive acceleration sensors. The improved sensor arrangement of the invention enables reliable and effective measuring of acceleration, in small capacitive acceleration sensor designs, in particular. The acceleration sensor arrangement measuring circuitry of the present invention can also be applied for multi-terminal sensors, such as, for example, acceleration sensors with three axes, by using time division signal multiplexing.

A method and system for calculating laser beam spot size, comprising: collecting a spot image of a laser beam and a corresponding background noise image along an optical axis direction; conducting pretreatment using a background subtraction method and a threshold method according to the spot image and the background noise image collected to obtain a pretreated spot image; calculating the central position of a laser spot of the pretreated spot image; and storing the pixel gray values of the spot image at the central position of the laser spot on a horizontal direction and a vertical direction, then conducting Gaussian curve fitting, calculating variances of Gaussian fitted curves on the horizontal direction and the vertical direction, and obtaining the spot radiuses of the spot image on the horizontal direction and the vertical direction according to the variances calculated.

A connection device for connecting a tubular member to another member comprises a clamp ring, which is arranged in an inner bore of an outer housing, and includes a plurality of clamping fingers which are deflectable essentially in radial direction relative to the inner bore and a deflecting bushing which is displaceable by at least one driving means in axial direction of the inner bore between a stand-by position and a deflecting position. The deflecting bushing in its deflecting position deflects the clamping fingers radially inwardly. The driving means comprises a rotatable, axially not displaceable spindle along which the deflecting bushing is movable.

The invention discloses a suspension oil cylinder common-frame simulation test device for a large mining truck, and belongs to the technical field of hydraulic cylinders. A rack comprises a baseplate, an L-shaped side vertical plate, a front vertical plate and a back vertical plate; a rack connecting body is mounted on the front vertical plate; a loading base is fixed below the rack connecting body; a loading connecting body is mounted on the loading base; a tested oil cylinder is connected between the rack connecting body and the loading connecting body; and a loading device is fixed below the loading base. The tested oil cylinder is fixed on the rack through simulating a main machine mounting form; and a loading oil cylinder in the loading device performs dynamic loading test under the simulation working condition on the tested suspension oil cylinder to simulate the use working conditions of the suspension oil cylinder to the greatest extent to inspect related reliability of the suspension oil cylinder. The device is simple in structure and low in production cost, and simulates the use working conditions of products to the greatest extent through controllable loaded loads; and the rack is high in compatibility and suitable for most existing suspension oil cylinder product tests.

The invention discloses an engine turbocharger provided with an intelligent lubricating device and a system thereof. The engine turbocharger structurally comprises an engine sump, an oil pump and a turbocharger body, wherein the turbocharger body comprises an electromotor oil pump, a normally closed solenoid valve, a normally open solenoid valve, a supplementary oil way and a normally open oil way; and the system comprises a control unit, an oil pump motor unit, a normally closed solenoid valve unit, a normally open solenoid valve unit, an engine control unit, a comfort system control unit, avehicle door dead lock signal unit, a safety belt lock catch signal unit and a plurality of CAN network cables. Compared with the prior art, the engine turbocharger and the system thereof overcome thedefect that lubrication of an existing turbocharger is poor before the engine is started and after flameout of the engine without changing the original engine structure.

The invention relates to a method and device for online detection and rejection of unembossed coins. The method comprises the steps of: sending coins to a belt conveyor, and spacing out the distances among the coins by utilizing the conveying velocity of the belt conveyor; uniformly spreading the coins in the single-layer state by utilizing a single-layer treatment device; capturing images of thecoins by using a camera or a video camera and transmitting the images to a computer for processing; and figuring out the number and the positions of unembossed coins by a computer, and controlling a rejecting device positioned at the rear end of the belt conveyor to reject the unembossed coins. The device comprises a belt conveyor (5) used for conveying the coins, a feeding mechanism (1) arrangedat an inlet end of the belt conveyor, a single-layer spreading scraper-plate mechanism (2) arranged above the belt conveyor, a visual inspection device (3) arranged above the belt conveyor and positioned at the rear end of the single-layer spreading scraper-plate mechanism (2), a rejecting device (4) arranged at an outlet end of the belt conveyor, and the computer connected with the visual inspection device (3) and the rejecting device (4) in a communication way. According to the method and the device provided by the invention, online detection and rejection of the unembossed coins entrained in embossed coins can be realized.

The invention relates to a novel closed high-temperature hot-air airship. The novel closed high-temperature hot-air airship has the advantages that advantages of traditional airships are kept, and the defect of dependency of the airship on helium is overcome; high-temperature hot air at the high temperature of 250 DEG C-350 DEG C is used as a filling gas of the airship, and since the density of the high-temperature hot air is far lower than that of air, the high-temperature hot-air airship can take off and fly as a helium airship; meanwhile, hot air is cheap and easy to obtain, so that usage costs of the airship are greatly reduced, and the adaptability is high; the temperature of the high-temperature hot air is much higher than that of hot air used for traditional hot-air airships, so that the airship has a bigger lift force under the same size, and practical values of the hot-air airship are improved.

The invention provides a cam constant force mechanism. The constant force mechanism comprises a base and a cam mechanism. The base is composed of a cover plate, a shell and a bottom plate. The cover plate, the shell and the bottom plate are sequentially fixedly connected. The cam mechanism is composed of a screw, a spring, a push rod, a roller, a cam shaft and a cam. The screw, the spring and the push rod are sequentially connected. The screw is screwed with the bottom of the shell through a thread. The cam is fixedly connected with the cam shaft and installed inside the shell. The roller is arranged on the top of the push rod and makes contact with the cam. The cam contour line of the cam meets the condition that the torque, generated for the center of the cam, of the roller is kept constant when the cam rotates. The cam constant force mechanism has the beneficial effects of being compact in structure, small in size, high in reliability, capable of not being limited by the installing position, and the like.

An automated test apparatus for risk and integrity testing for pharmaceutical filtration membranes, including at least the following components: a liquid injection inlet, a pump, a fluid pressure gauge, a gas pressure gauge, a plurality of solenoid valves, a plurality of membranes, a gas pressure regulator valve, a pharmaceutical product bottle, and a bubble generation bottle. The automated test apparatus of the present invention is controlled by computer software in connection with an automatic pharmaceutical synthesis apparatus for automated testing. In use of the automated test apparatus of the present invention, it needs only to start the operating system of the automated test apparatus for membrane risk and integrity test after the completion of the automatic pharmaceutical synthesis. The membrane risk and integrity test can be accomplished in a short time by measuring pressures of gas and liquid with pressure gauges deposed online concurrently.

A weak link (17, 43) for a riser system comprising a pin (2, 25) and a box (1, 24), bolts (11, 34) for releasably connecting the pin (2, 25) and the box (1, 24), the bolts being designed to break at a predefined tension. The link further comprising a pressure balancing mechanism for balancing axial forces acting on the bolts (11, 34) due to end cap effect. The weak link also comprises a strong mode mechanism and a dampening mechanism.

The invention provides a polymer material, which is represented by the formula I and contains cholic acid, and a preparation method thereof. The invention further provides a liposome, which takes phosphatide and cholesterol as the carriers and is modified by the polymer material represented by the formula I. Drugs are coated in the phosphatide bi-molecule layer. The provided liposome has double functions of active targeting and passive targeting; and furthermore, the preparation method is simple and practical and can be applied to massive production. The in-vivo experiment results show that the liposome has a strong targeting performance on livers and thus has a good application prospect.

A method for determining a protection radius of a vision-based navigation system includes at least one image sensor able to produce at least one first image at a first instant and one second image at a second instant; and a processing unit coupled to each image sensor and able to implement a processing method able to determine at least one value of motion between the first instant and the second instant on the basis of the first image, of the second image and of a plurality of image data determined on the at least first and second images; the method comprising the following steps: a first step of determining at least one nominal value of uncertainty of the at least one motion value obtained by the processing method for a set comprising the plurality of image data determined; a second step of determining i-th sub-values of uncertainty of the at least one motion value determined by the processing method for an i-th subset defined by removing an i-th part of the image data determined; a third step of determining an i-th protection radius for the i-th subset on the basis of the i-th uncertainty sub-values and of the at least one nominal uncertainty value; the second and third steps being repeated for each i-th subset, i varying between 1 and a defined value M; a fourth step of determining a protection radius on the basis of the M i-th protection radii determined.

The invention discloses a snow producing machine. The snow producing machine comprises a shell, a roller device, a swing air supply device and a cutter; the internal of the shell is divided into an upper cavity and a lower cavity; the roller device is arranged in the upper cavity; the right end of the roller device is connected with a transmission device; the roller device is provided with a cutter at the upper end and a water tank at the lower end; the swing air supply device is arranged on the back side of the lower cavity; an exhaust port is formed in the shell in front of the lower cavity; the roller device includes an outer roller and a liner; the liner is arranged in an internal cavity of the outer roller; the liner and the right end of the outer roller are fixedly connected through a positioning seal sleeve; the right end of the liner extends out from the internal of the outer roller to form a refrigerant outlet; a refrigerant inlet is formed in the bottom end, outwards extending, of the liner; the right end of the liner is coated with a sealed bearing; and a row of refrigerant nozzles is formed in the lower side surface of the liner. The snow producing machine has the advantages of simple structure and principle, lower manufacturing cost and high generality, can be widely applied to small ski fields and snow fields with low costs, and is higher in practicability.

The invention relates to a drill bit with energy-gathered attack to unload well bottom stress and a drilling method. The drill bit comprises a drill bit body, an energy-gathered spring and a dominanceattack assembly, wherein the dominance attack assembly is installed inside the drill bit body, energy-gathered attack teeth at the bottom end of the dominance attack assembly protrude out of cuttingteeth at the bottom surface of the drill bit body, the energy-gathered spring is installed inside the drill bit body and above the dominance attack assembly, and the dominance attack assembly and thedrill bit body can axially move relative to each other but cannot rotate relative to each other, so that the energy-gathered attack teeth at the bottom end of the dominance attack assembly protrude out of the drill bit cutting teeth at the bottom end of the crown of the drill bit body to crush the well bottom to form an annular well bottom, the well bottom stress is released, the drill bit cuttingteeth at the bottom end of the crown of the drill bit body break rock under pressure and torque, the whole rock breaking process is realized by releasing the stress firstly and breaking the rock of the well bottom completely, and the drilling speed process is improved.