113results about How to "The signal is stable and reliable" patented technology

The invention discloses a device and a method for detecting attention focusing degree based on the analysis of heart rate variability, mainly solving the problems of large interference and inconvenient testing of reference signals for attention judgment in the prior art. The method comprises the following testing steps: acquiring original electrocardiographic digital signals according to a MV5 lead mode; filtering the interference in the original electrocardiographic digital signals, extracting the position of a R wave and calculating heart rate variability signals; integrating and segmentingthe heart rate variability signals; performing empirical mode decomposition on each segment of the heart rate variability signals; calculating the approximate entropy of the heart rate variability signals and intrinsic mode function component signals; training a neutral network by using the calculated approximate entropy as an input vector of a reverse transmit neural network algorithm, and determining the parameters of codes of a neutral network; and detecting the attention focusing degree of a subject by utilizing the trained neutral network and outputting the test result. The invention hasthe advantages of large reference signal strength, convenient test and high accuracy, and is used for testing the attention focusing degree of a human body.

Since it is difficult to emit a stable and reliable modulated lightwave signal by means of IQ modulators used for QAM format, a method for controlling an optical transmitter according to an exemplary aspect of the invention includes the steps of (a) keeping an optical amplitude of a continuous wave light output from the optical transmitter constant, (b) making operating point values in optical modulation converge to predetermined values during step (a), and (c) modulating the continuous wave light with multiple amplitudes and phase levels around the operating point values converged in step (b).

A switch-driving circuit suitable for driving a full-controlled power switch combination is disclosed. The switch-driving circuit includes a first pulse-width modulator, a high-voltage isolation pulse transformer module and a plurality of output modules. The high-voltage isolation pulse transformer module includes a magnetic core connected to multiple output modules in a one-to-many way, or includes multiple magnetic cores connected to multiple output modules in a one-to-one way. Each output module includes a second pulse-width modulator and a driving-power amplifier. The full-controlled power switch combination includes a plurality of full-controlled power switches. The driving-power amplifier is coupled between the second pulse-width modulator and one of the full-controlled power switches.

The invention relates to hydraulic turbine governor out-of-control signal diagnosis and control methods. The diagnosis method is mainly based on electrical feedback signals acquired by a measuring unit of a hydraulic turbine governor; when the governor receives a command for opening or closing a guide vane, a difference value exists between control output, namely a target value that the guide vane needs to reach, and actual guide vane opening, and the difference value is higher than a set dead zone value; on normal conditions, a main distributing valve of the governor is controlled by PID (proportion integration differentiation) computation of a PLC (programmable logic controller) to be opened towards a target direction by a certain opening, and the guide vane is controlled to move towards the target direction; then periodical scanning is performed through a PLC program to read whether the opening of the guide vane moves towards the target direction or not and judge whether a movement speed meets the requirement for governing computation on-off time or not, and if a change value, read within a certain delay time, of the guide vane opening does not reach a change rate towards the target direction, the governor is judged to be out of control, and safety of a generator set is protected.

The invention discloses an analysis device based on an electrochemical luminescence technology and double-pole electrode configuration. The analysis device comprises a mini-type dark room for storing a reaction reagent and having a reaction and a liquid storage tank for storing detection objects and having an oxidization-reduction reaction, wherein a double-pole electrode and an electric signal applying unit are arranged between the mini-type dark room and the liquid storage tank respectively; one end of the double-pole electrode is packaged in an inner cavity at the bottom of the mini-type dark room and the other end of the double-pole electrode stretches into the liquid storage tank; and meanwhile, a positive pole of the electric signal applying unit stretches into the liquid storage tank through a driving electrode and a negative pole of the electric signal applying unit is connected with the top of the mini-type dark room through a driving electrode. According to the analysis device based on the electrochemical luminescence technology and the double-pole electrode configuration, the stored detection objects are linked with signal molecules, so that the oxidization-reduction reaction in the liquid storage tank is transmitted into the mini-type dark room in an electron form, a light signal is generated and a corresponding electrochemical luminescence signal is realized, so that the sensitivity and reliability of detection are extremely improved.

The invention relates to onboard power generation equipment of an unmanned aerial vehicle. The onboard power generation equipment comprises a brushless generator, a three-phase alternating current rectifier, a 5V DC-DC module, a 12V DC-DC module and a lithium iron phosphate battery. The onboard power generation equipment is characterized in that the brushless generator is connected with the DC-DC modules through the three-phase alternating current rectifier, the 5V DC-DC module and the 12V DC-DC module are both connected with the lithium iron phosphate battery in parallel, the 5V DC-DC module is connected with a steering engine, and the 12V DC-DC module is connected with a self-driving instrument, a radio station and a pan-tilt camera. The onboard power generation equipment is direct-current power supply equipment which supplies two voltages to the unmanned aerial vehicle, so that the unmanned aerial vehicle has super-long continuous flight time; the onboard power generation equipment is small in size, light in weight, and capable of providing efficient electric energy and stable voltages; the onboard power generation equipment is in communication with the self-driving instrument on the unmanned aerial vehicle to transmit the engine revolution, the generating voltage, load power distribution parameters and the like to a ground station during flight, and signals are stable and reliable.

The invention discloses a bi-directional wireless intelligent door magnetic detector. The bi-directional wireless intelligent door magnetic detector comprises a cylinder and door magnetic switch combination body, a wireless door magnetic sensor and a door magnetic alarm, wherein the wireless door magnetic sensor comprises a door magnetic sensor, door closing and opening circuits, a power module, an MCU (microprogrammed control unit), a voltage-stabilizing and filtering circuit, a Wi-Fi (wireless fidelity) module power supply control circuit, a clock circuit and a low-voltage detection circuit; an input end of the door magnetic sensor is divided into two paths, one path is electrically connected with the door closing circuit and the clock circuit, and the other path is electrically connected with the door opening circuit and the MCU through the voltage-stabilizing and filtering circuit; the voltage-stabilizing and filtering circuit and the MCU form a closed loop through the Wi-Fi module power supply control circuit and a Wi-Fi module; an output end of the door magnetic sensor is electrically connected with the MCU through the door closing circuit and the door opening circuit. The bi-directional wireless intelligent door magnetic detector solves the problems that a detector in the prior art is high in cost, large in size, complicated in circuit and high in power consumption and a battery can only support the detector for a few days, can detect the opening and closing states of doors, windows and drawers, and has the advantages of low power consumption, low cost and small size.

The invention relates to a detecting device for positive and negative surfaces of a valve seat ring. The detecting device comprises a vertical main bracket, wherein the upper part of the main bracket is fixed together with a cylinder barrel of an air cylinder; a piston rod of the air cylinder faces upwards and is fixedly connected with the right end of a bracket I; a detection rod penetrates through a longitudinal seam in the left end part of the bracket I; a detection head is arranged at the lower end of the detection rod; a spring in a compression state sleeves the detection rod between the detection head and the bracket I; a limiting gasket is fixed at the upper part of the detection rod; a clamping block fixed on the detection rod is arranged above the limiting gasket; a limiting slot which penetrates in the front-rear direction is formed in the right end of the clamping block; a bracket II is fixed on the middle part of the bracket I; a pin II in the front-rear direction is arranged at the left end of the bracket II; the pin II is rotationally connected with a light shielding plate; a pin I penetrates through the limiting slot and the left end part of the light shielding plate in the front-rear direction; a photoelectric switch is arranged at the right end of a bracket II; the right end of the light shielding plate is provided with a light through slot corresponding to the photoelectric switch. According to the scheme, the invention provides the detecting device, which adopts a mechanical contact mode and is high in reliability, for positive and negative surfaces of the valve seat ring.

The invention discloses a control method and device for starting and stopping of compressors in a parallel connection unit. By optimizing the running time of the compressors, reliable running of the system is guaranteed. The method includes the following steps that the gas sucking pressure p of the parallel connection refrigerating unit is acquired, and is compared with the machine increasing pressure p and the machine decreasing pressure pj; and the accumulated running time of the standby compressors is read, and the compressors are controlled to be started and stopped orderly according to the principle that the compressor shortest in accumulated running time is firstly started and the compressor longest in accumulated running time is firstly shutdown. According to the control method, bycomparing the total accumulated running time of the compressors, the compressors are controlled to start and stop, the running time of the compressors is made uniform, starting and stopping are made in order, and the reliability of the system is improved. The possibility that the compressors in the refrigerating parallel connection unit break down is reduced, the service life of the whole refrigerating parallel connection compressors is prolonged, and the problem that the service life of the compressors is not matched with the service life of other devices of the refrigerating parallel connection unit is solved.

The invention discloses a road slope real-time estimation method for an automobile, which aims to solve the shortcomings of the prior art, such as many quantities of calibration, heavy influence of automobile acceleration and deceleration, large use of sensors, high cost, much dependence on automobile parameters, complex models and poor robustness. The real-time estimation method comprises the following steps: 1, initializing signal, initializing sensors after each power supply, and correcting the original errors of data; 2, pre-processing input signal, including 1) threshold limit, 2) slope limit, 3) low-pass filtering and 4) sliding average filtering; 3, correcting longitudinal acceleration signal; 4, based on Kalman filtering algorithm, calculating the parameters needed for weighted fusion and conducting data fusion by determining the reliable degree of acceleration signals and the situation of the automobile going up and down slope; and 5, correcting the slope and outputting the optimal estimate of the road slope.

The invention discloses a gear indicator of a commercial vehicle transmission. The gear indicator comprises an engine speed sensor, a transmission output shaft speed sensor, an operating lever front-rear position sensor, a gear display controller and a multi-functional instrument or an external LED display screen, wherein the gear display controller integrates the speed ratio, the operating lever gear position, the clutch switch signal, the neutral gear switch signal, the reverse gear switch signal and the operating level position switch signals for logical gear judgement, so as to judge the current gear state of a vehicle. The gear indicator disclosed by the invention has the advantages that through calculation and analysis of the relative speed ratio of the engine speed to the transmission shaft speed as well as the preset gear coefficient, the gear information can be precisely obtained; the structure of the commercial vehicle transmission is unchanged; and through addition of the gear display controller as well as a corresponding route, a gear position inductive switch, and the LED display screen, the vehicle equipped with any one transmission can have the abilities for modification and display of detailed gears.

The invention discloses a transducer capable of being directly applied to various ultrasonic flow meters. The transducer capable of being directly applied to the various ultrasonic flow meters is characterized by comprising a piezoelectric ceramic wafer support, a cylindrical sealing element which is connected with the outer portion of the piezoelectric ceramic wafer support in a sleeved mode, and a hard outer shell which contains a piezoelectric ceramic wafer, the piezoelectric ceramic wafer support and the cylindrical sealing element, the piezoelectric ceramic wafer support and the cylindrical sealing element are fixed on the hard outer shell through fixing screws, a whole space is formed by a gap between a ultrasonic emitting surface or a receiving surface and an annular air slot, an air slot and the piezoelectric ceramic wafer and a free space in the hard outer shell, the whole space becomes a sealed space after vent holes are sealed through sealing screws, and the whole space is filled with coupling agent. The transducer capable of being directly applied to the various ultrasonic flow meters has the advantages of being capable of assembling the transducer to a whole component which is applied to the device according to different application situations or requirements, good in corrosion resistance, impurities resistance, scaling resistance, temperature character, pressure resistant character and signals, and capable of preventing the piezoelectric ceramic wafer from cracking and solving the problem that the ultrasonic transducer can not solve.

A switch-driving circuit suitable for driving a full-controlled power switch combination is disclosed. The switch-driving circuit includes a first pulse-width modulator, a high-voltage isolation pulse transformer module and a plurality of output modules. The high-voltage isolation pulse transformer module includes a magnetic core connected to multiple output modules in a one-to-many way, or includes multiple magnetic cores connected to multiple output modules in a one-to-one way. Each output module includes a second pulse-width modulator and a driving-power amplifier. The full-controlled power switch combination includes a plurality of full-controlled power switches. The driving-power amplifier is coupled between the second pulse-width modulator and one of the full-controlled power switches.

The invention discloses an information source cell backup method which comprises the following steps: (1) backing up a system; (2) setting a switching judgment power threshold and a switching time length threshold when the output power of a radio frequency remote unit is lower than the switching judgment power threshold; and (3) selecting the link switching way, and performing radio frequency switching between a main information source radio frequency remote system and a backup information source radio frequency remote system according to the selected link switching way, wherein the link switching way comprises the automatic mode, the manual mode and the forced manual mode. The invention further discloses an information source cell backup system which comprises the main information source radio frequency remote system, the backup information source radio frequency remote system and a radio frequency switching unit. The automatic switching between the main radio frequency remote system and the backup radio frequency remote system is realized; and compared with the prior art, the method and the system have the advantages of flexible control way and convenience in use.

The invention provides a portable multidirectional wireless monitoring back box. The portable multidirectional wireless monitoring back box is provided with a plurality of cameras towards different directions, a satellite positioning functional module and an antenna, wherein the satellite positioning functional module and the antenna are connected with a third generation telecommunication (3G) system. All the components are fixed or placed in a box body capable of being carried on the back and an outer shell. The portable multidirectional wireless monitoring back box is capable of achieving multiple functions of video collection (multi-view), wireless communication (text transmission and image transmission), satellite positioning, local audio / video storage, and placing and fixing parts such as a portable computer or a tablet personal computer and accessories thereof, an ear-hanging camera, a reserve power supply and a charger, can carry out multi-view real-time video collection, transmission and monitoring, can carry out visualized speech communication with a control center, and can also carry out multi-view three-dimensional monitoring through an externally-connected device (for example, the ear-hanging camera). The portable multidirectional wireless monitoring back box is convenient to carry and move, simple in concealing, use and operation, and stable and reliable in signals.

The present invention discloses an intelligent socket with an electric modem. The intelligent socket comprises an access wire terminal, a processor, a switch circuit, output wire terminals, a wifi-AP, a shell, a coupling module, and a filtering module. The shell is a rectangular or circular body and is internally provided with the processor, the coupling module, the filtering module, the switch and the wifi-AP. The side face of the shell is provided with the access wire terminal and multiple output wire terminals. The shell is provided with a button, an indication lamp, an RJ45 interface and a USB interface. The coupling module comprises a coupling circuit, a high pass filter, and an analog front end. The filtering module comprises a PLC filter and a direct current step-down transformer. The PLC filter and the processor transmit power and information to the output wire terminals through the switch circuit. According to the intelligent socket, an electric modem circuit is arranged and integrated in the intelligent socket, the functions of the intelligent socket and the electric modem are integrated mutually, an intelligent and network monitoring function is realized through a home electric loop, rewiring is not needed, and enough network nodes are provided by a wifi-AP router.

The invention discloses a wireless monitoring device for monitoring sampling processes. The device is in a shape of a lug hanger which is provided with a plug-in camera, a built-in camera and an independent pickup. The device has functions of double video signal acquisition and output, voice signal acquisition and output, and voice signal input headphone output, realizes simultaneous two-way video watching and storage after back end transmission and storage equipment are connected, and further realizes two-way voice talkback. In actual operations, even if the plug-in camera fails to acquire true videos, the built-in camera also can complete video acquisition and transmission, so that probability that samplers practice fraud is reduced, authenticity and effectiveness can be further guaranteed during the video acquisition. The wireless monitoring device for monitoring the sampling processes is portable, convenient to wear, simple and easy to connect, similar to existing technical products in shape and convenient to conceal.

The invention discloses a polar fast electron measurement probe system suitable for magnetic confinement plasma. The polar fast electron measurement probe system comprises an insulating shell, fast electron probe assemblies, a Langmuir probe assembly, a ceramic base and a graphite shell. The insulating shell is made of high-temperature-resistant boron nitride, and the ceramic base is made of machinable ceramic. The probe assembly comprises a graphite probe, a copper binding post, a wire and other components, the graphite probe is in threaded connection with the copper binding post, and the copper binding post is in tin soldering connection with the wire or is in press connection with the wire through crimping pliers. The fast electron probes are uniformly and symmetrically distributed in the polar direction, and fast electron components from different directions can be measured. The graphite probes of the fast electron probes are located in the small holes and are applied with positivebias voltage. The radius of the electron Larmor in the magnetic confinement plasma is far less than that of ions, the ions can be effectively repelled by setting the diameter and the depth of the small hole so as to collect electrons. The system can work in the high-temperature environment in the magnetic confinement fusion device, and is stable in mechanical performance, reliable in signal, highin spatial resolution and small in occupied space.

The invention relates to a urea hydrolysis reactor control method based on the heat feed-forward signals, which comprises the steps of 1) acquiring a transfer function from a hydrolysis rector load to heating steam consumption; 2) generating a path of heating steam consumption signals through the transfer function by a hydrolysis rector load instruction, and converting the heating steam consumption signals into corresponding first heating steam governing valve openness signals; 3) generating second heating steam governing valve openness signals through a governing valve openness control function by a hydrolysis rector pressure deviation signals, and acquiring a deviation value; 4) leading the first heating steam governing valve openness signals into heating steam governing valve openness automatic control logic to act as feed-forward signals, and determining an openness reference value; and 5) weighing the heating steam governing valve openness reference value and the deviation value, outputting the weighed heating steam governing valve openness reference value and the weighed deviation value so as to acquire heating steam governing valve openness signals under variable load conditions. The control system provided by the invention comprises a PLC (programmable logic controller) which is used for receiving the hydrolysis reactor load instruction, a hydrolysis reactor pressure set value and measurement signals.

The present invention discloses a design scheme of an intelligent locking apparatus for a center control lock and belongs to the technical field of automotive electrical appliances. The intelligent locking apparatus comprises display circuits, basic automobile doorframe units, input system units, an automatic input identification circuit unit, a restoration identification correction circuit unit, an input locking unit, a releasing and unlocking circuit unit, an execution control circuit unit, a power supply intelligent management circuit unit and a battery power supply. One input system unit is mounted in each basic automobile doorframe unit; each input system unit comprises an automation detection circuit unit, an integrated input circuit unit and an OR gate opening circuit. According to the design scheme, the automotive center control lock in an automobile is automatically locked after the automobile door closing process is finished; an alarm is automatically put into the apparatus; the scheme is also capable of automatically detecting operation states of important parts of the apparatus in the automobile door closing process, automatically detecting fault parts in cases of faults, displaying results of the state content of the detected faults, automatically correcting the faults in a certain time and ensuring safety of the automobile.

The invention relates to the field of vocational education, and discloses an intelligent tool vehicle. The intelligent tool vehicle comprises a main control board and a plurality of molds. A sensing device is arranged in each mold to sense whether there is a tool in the mold. The sensing devices are connected with the main control board, and output electrical signals representing sensing results to the main control board through the connection. The main control board is used for generating a first correspondence between sensing device identifiers and sensing results according to the sources of electrical signals representing sensing results. The main control board is connected with an external computer, and uploads the first correspondence to the computer. Thus, the computer can judge the mold names and mold positions of the molds without tools therein in the tool vehicle according to the first correspondence and a preset second correspondence of sensing device identifiers, mold names and mold positions. Training teachers can have a real-time and dynamic understanding of the use conditions of all the tools in the tool vehicle (which tools have been returned and which tools have not been returned), and can know the use frequency of each tool managed thereby at any time.

The present invention discloses an auxiliary contact device for medium voltage switching apparatuses comprising a fixed contact sub-assembly comprising at least a pair of fixed contacts, a movable contact sub-assembly comprising at least a movable contact that is rotatably connected with said fixed contacts, an operating shaft comprising a first shaft portion, operatively coupled with a linear actuator, and a second shaft portion, operatively coupled with said movable contact sub-assembly. The first and second shaft portions of said shaft are coupled each other and move linearly together between a first position and a second position. The second shaft portion of said shaft is free to rotate with respect to said first shaft portion, between a third and fourth position.

The invention discloses a method for screening a CD47 / SIRP alpha blocker by an HTRF (Homogeneous Time Resolved Fluorescence) one-step method, and belongs to the field of blocker screening methods. Thescreening method comprises the following steps: configuring the constructed CD47 and SIRP alpha proteins with different labels as samples to be screened; sequentially adding the CD47 and SIRP alpha proteins as the samples to be screened into a microplate; incubating at room temperature, reading by using Eliasa to detect fluorescence, and the ratio of 665 nm / 620 nm being the raw data. The method disclosed by the invention realizes the screening of CD47 / SIRP alpha various blockers at the biochemical level, and can effectively screen high expression cell line cloning in a short time, and accelerate the progress of the pharmaceutical research and development industry.

The invention relates to a grounding current protective function module for a circuit breaker. The grounding current protective function module comprises a current transformer, an electronic circuit I, an electronic circuit II, a central processor, a parameter adjusting display circuit and an executing circuit, wherein the current transformer is used for sampling a grounding current value in a protective circuit; the current transformer is used for amplifying a weak voltage signal through a branch gear of the electronic circuit I, transmitting to the central processor, and inputting into the electronic circuit II; the electronic circuit II is used for transmitting a signal subjected to anti-interference restraining processing into the central processor; and the central processor is used for exchanging a signal with the parameter adjusting display circuit and sending an execution command to the executing circuit. Due to the adoption of a standard grounding sampling signal current transformer, the sampling signal is stable and reliable when the current passes through a conductor, and the signal sampling accuracy of an intelligent controller is increased. The sampling signal can be directly transmitted to the central the central processor, so that high stability and high universality are realized; the grounding current protective function module can be applied to various circuit breakers needing grounding protection; and a structure can be designed uniformly, so that the production cost is lowered.

The invention relates to a technology for picking up and processing a sound signal and an electric signal (QRS waves) of the heart of a fetus, which comprises an acoustoelectric sensor and a signal processing method which is a self learning system using the synchronization of the sound signal and the electric signal as a target. The system acquires an ability to identify the sound signal of the heart of the fetus and mixed QRS waves of the mother and the fetus by learning. When the technology is carried out, and the sound signal and the electric signal synchronously appear, an operator determines the current QRS is the electric signal of the heart of the fetus, and a bigger weight is multiplied; if only the QRS exists without being followed by the sound signal of the heart, the operator determines the current QRS is the electric signal of the heart of the mother, and a smaller weight is multiplied.

The invention relates to a universal tube cleaner indicator and belongs to the field of petroleum and gas pipeline mechanical equipment. The universal tube cleaner indicator comprises a trigger component, a transmission component, and an indication component; the upper end of the trigger component is provided with a trigger magnet, and the lower end of the trigger component is provided with a contact which is a universal trigger switch; a first compression spring is sleeved on the trigger magnet; the transmission component comprises a transmission rod and a transmission magnet fixed at the lower end of the transmission rod; the polarities of opposite ends of the transmission magnet and the trigger magnet are the same; and the indication component is connected with the transmission rod. When a tube cleaner or a tube cleaning ball passes through the contact, the contact rises or inclines to drive the trigger magnet of the trigger component to rise; and under the action of magnetic force, the transmission magnet rises to drive the transmission rod to rise. A magnetic force principle is adopted; the universal tube cleaner indicator has the advantages of simple structure, reliable and accurate signal, and convenience in installation, and cannot be worn easily; and the problem of influence on installation directions can be avoided.

The invention discloses a resistor built-in printing circuit board and a manufacturing process thereof. A sprayed resistive layer which replaces a resistor on the surface of the circuit board is formed by the processes of shearing, circuit spraying, drilling, copper deposition perforation, electroplating and green oil spraying in turn; and the structure of a finished product comprises an insulation substrate, a metal circuit layer and an interlayer through hole, wherein the surface of the part, exposed from the metal circuit layer, of the insulation substrate is covered with an insulation printing ink layer; at least one pair of electrodes are formed in the metal circuit layer; the insulation substrate between each pair of electrodes is covered with the resistive layer; and each resistive layer extends to cover one of the two ends, which is close to the resistive layer, of the electrode. The product is wide in use; and a built-in resistor shortens the path of a signal to each element, reduces stray inductance, the crosstalk of the signal, the size of the circuit board, the weight of the product and welding spots on the circuit board, so that the product has the characteristics of precision, smallness, light weight and reliable signal and is suitable for requirement trends of the electronic products.

The invention relates to a micro-switch type automotive central door lock fastener and a production process thereof. The micro-switch type automotive central door lock fastener comprises a shaft snap spring, a fastener action output oscillating bar, a sealing ring, a reset torsion spring, a worm gear, a locking cushion, a fastener output shaft, a sector gear, an unlocking bumper block, a driving cam bit, a worm gear rotating shaft, a lower fastener shell, a motor electrode, a micro-switch binding post, a micro-switch, a motor, a pinion, a worm and an upper fastener shell. A signal extraction mechanism of the central door lock fastener utilizes the high-performance micro-switch to substitute for a reed and a slip sheet of a traditional fastener, and corresponding mechanisms of the fastener are appropriately designed and adjusted.