122results about How to "The principle is simple and reliable" patented technology

The present invention relates to a circuit protecting order component phase selecting method adopting two-end information. First, synchronous samplings of the phase current of the own side and the opposite side of the circuit are performed in a preset sampling speed, and the sampling value of the phase current of the opposite side is transmitted to the own side; then, the differential current vectors of each phase of said sampling result is calculated and the positive-sequence vector, the negative-sequence vector and the zero- sequence vector I1d, I2d, I3d are extracted using the A phase as the standard phase; the negative-sequence vector and the zero- sequence vector of the differential current are compared: -90 DEG 1.5*[1d] , it is the single-phase groud fault; or, it is the two-phase ground fualt. The method adopts a differential current to performe judging, and the principle is simple and reliable and is not influenced by the running mode of the system. The device has a high sensitivity and can select phase correctly when a conversion fault occurs.

The invention relates to a device and method for determining a molecular diffusion coefficient of a multi-component gas-liquid system in a rock core. The device mainly comprises an inlet pump, a confining pressure pump, a pressure returning pump, an intermediate container, a rock core clamper, an oil-gas two-phase separator, a pressure sensor and a computer, wherein one end of the intermediate container is connected with the inlet pump; thee other end of the intermediate container is connected with the rock core clamper; the rock core clamper is connected with the pressure return pump, the confining pressure pump and the oil-gas two-phase separator; and two ends of the rock core clamper are connected with the pressure sensor and the computer. The method comprises the following steps of: transferring an oil sample and a gas sample into the rock core through the inlet pump; contacting an oil phase with a gas phase to generate diffusion and cause the reduction of the gas phase pressure; monitoring the pressure change of a gas phase zone; after the gas and liquid reach the balance, enabling the drained fluid in the rock core to enter the oil-gas two-phase separator; and analyzing and testing the gas phase composition and the property change. The device and method disclosed by the invention are reliable in principle and simple and convenient in operation; and the molecular diffusion coefficient of each component of the multi-component gas-liquid system in real rock core in the gas phase and oil phase can be determined under different temperature and pressure conditions of an oil reservoir and reasonable base data is provided for quantitatively evaluating the influence on the improvement on the recovery ratio caused by a molecular diffusion effect.

The invention discloses a method for realizing high voltage cable-overhead line hybrid line fault ranging by using the phase characteristic of a positioning function, which belongs to the technical field of relay protection of power systems. The method comprises: firstly, acquiring positive sequence electrical data at two ends of a failed hybrid line system and equaling the entire hybrid line to a line of the same length; secondly, deducing the positioning function by using the positive electrical data at the two ends of the hybrid line system, and determining a minimum fault partition having a fault point according to the size of the phase of the positioning function; and finally, accurately finding the fault range of the hybrid line in the fault partition by using the size of the phase angle of the positioning function. The method can accurately find the position of a fault, reduce troubleshooting time and accelerate power supply restoration and has a great significance for the safe and economic operation of the power system.

The invention provides a terminal frequency point mapping and configuring method which includes the following steps that a terminal acquires frequency points of a broadcast channel, receives broadcast information at the frequency points of the broadcast channel, and selects a time slot to send Msg1; after receiving the Msg1, a base station selects a frequency point from the selectable frequency points, and generates and sends Msg2 which carries the selected frequency point information; the terminal obtains time frequency resources of the Msg2 according to the mapping relationship of the Msg1 and the Msg2 and receives the Msg2 on the time frequency resources; the terminal sends Msg3 and receives Msg4 at the assigned frequency point of the Msg2.

The invention provides a translation and rotation driving method for an electric power overhaul lifting platform. The translation and rotation driving method for the electric power overhaul lifting platform comprises the following steps of firstly, parking an engineering vehicle below a fault electric power facility, starting a lifting motor in a connecting rod lifting mechanism, driving two driving blocks to move close to each other along a sliding groove by a bidirectional screw rod, a first connecting rod A and a first connecting rod B are close to each other and rotate and rise, a second connecting rod A and a second connecting rod B are close to each other and rotate and rise, a plurality of connecting rod assemblies rise synchronously, and the lifting platform moves upwards to rise;then, a sliding component I and a sliding component II matches with each other to jointly drive the lifting platform to translate in any direction in the horizontal plane; and finally, a stepping motor is started, a rotating plate drives a sliding driving mechanism and the connecting rod lifting mechanism to synchronously rotate in the axial direction of the rotating plate, the lifting platform rotates around the electric power and stops rotating to the proper position, and all-dimensional repair and maintenance of the electric power are facilitated for operators on the lifting platform.

The invention belongs to the electrical equipment technology field and relates to a magnetron power supply device used in a microwave oven. An inductor and a capacitor are electrically connected so as to form an LC filter circuit. A current transformer is electrically connected to the LC filter circuit and a voltage detection circuit respectively. An original edge transmitting coil, a secondary edge receiving coil, an original edge compensation capacitor, a secondary edge compensation capacitor and a pick-up coil are electrically connected so as to form a resonance coupling network. A single chip microcomputer control circuit is connected to an auxiliary power supply, a comparison conditioning circuit, a given power control panel and a driving circuit in an electrical information mode respectively. An input terminal of a rectifier bridge is connected to a 220V alternating current input power supply. An output terminal of the rectifier bridge butts the LC filter circuit so as to form an input power supply unit. An input terminal of a voltage doubling rectifying circuit is electrically connected to the resonance coupling network. An output terminal of the voltage doubling rectifying circuit is connected to a magnetron in parallel so as to form the magnetron power supply apparatus. A main body circuit structure is novel, a principle is simple and reliable, output power is large, manufacturing cost is low, a service life is long, a market prospect is good and an application environment is friendly.

The invention relates to the technical field of configuration of monitoring pictures, in particular to an implementation method for fast configuring monitoring pictures. Engineering configuring content such as equipment, variables, the pictures and the like repeatedly used in power configuration software engineering is templated and unitized to configure all units, and when power monitoring projects are configured, the equipment, the variables, the graphic pictures and the like are fast generated from a template. In the process, a user only needs to do basic configuration and variable and character string replacement work according to configuration file requirements, therefore, engineering configuration is fast set up, and the configuration work efficiency is greatly improved.

The present invention discloses a single-point temperature compensation multi-functional intelligent anchor pole and an installation laying method thereof. The pole comprises a non-welding long-gauge multi-grating sensor with temperature compensation, epoxy resin or anchor adhesive, armored cables and a soft plastic sleeve. The non-welding long-gauge multi-grating sensor includes a plurality of long-gauge fiber grating sensing units which are in non-welding series connection in order and a temperature compensation sensing unit in the same non-welding series connection at the top. Two ends of the fibers of the long-gauge fiber grating sensing units are respectively fixed at the anchoring points of the sleeve, one end of the fiber of the temperature compensation sensing unit is connected with the long-gauge fiber grating sensing units themselves and is fixedly connected with the sleeve at the anchoring points, and the other end of the fiber of the temperature compensation sensing unit is free. The single-point temperature compensation multi-functional intelligent anchor pole and the installation laying method thereof can be applicable to anchoring reinforcement in the related engineering such as the construction, the tunnel, the minerals and the like, can monitor the carrying capacity, the strain stress and the damage situation of the anchor rod, and can be configured to monitor the surrounding rock support, the surrounding rock convergence and deformation and stability, etc.

The invention discloses a multi-spectral radiation temperature measuring system and a multi-spectral radiation temperature measuring method. The multi-spectral radiation temperature measuring system comprises a wide-spectrum light source, and an incident collimating lens group, an emergent collimating lens group and a spectrograph which are sequentially arranged on an emergent light path of the wide-spectrum light source. A to-be-measured flame is arranged between the incident collimating lens group and the emergent collimating lens group. According to the multi-spectral radiation temperature measuring system, an emissivity coefficient self-calibration system is arranged on the same path as the measured flame. Flame emissivity coefficients under different wavelengths are obtained by recording spectral parameters of the wide-spectrum light source, the flame and the wide-spectrum light source plus the flame. The method is used for correcting parameters of the multi-spectral radiation temperature measuring system, overcomes model error in traditional theory calculation correction and improves the measurement uncertainty.

The invention discloses a method for adjusting particle orbital centering by using first harmonics in a cyclotron. The method comprises the following steps: eight coils that are symmetric up and downrelative to a midplane are used for generating a correction magnetic field; the positions and passing currents of all coils are arranged and set to guarantee generation of first harmonics with randomly adjustable amplitudes and phases; and according to an actual eccentricity value of a particle orbit, the amplitudes and directions of the passing currents of all coils are adjusted, so that centering of the particle orbital is optimized. The method is based on the simple and reliable principle; the external direct-current power supply of the accelerator is controlled to realize on-line adjustment during the debugging operation process of the accelerator by combining real-time feedback of beam detection of the accelerator; and the feasibility and operability are high. Compared with the traditional methods modifying the DEE plate shape or the location of an ion source, the method disclosed by the invention enables real-time adjustment to be realized during the debugging operation process of the accelerator, so that the adjustment flexibility is enhanced and the adjustment accuracy is improved.

The invention provides an integrated fruit and vegetable cleaning and chopping machine, which can automatically, quickly and efficiently complete the cleaning and chopping work of fruits and vegetables with a single machine, and is convenient for people to quickly process fruits and vegetables with mud and sand. The integrated fruit and vegetable cleaning and chopping machine includes a vertically arranged inner drum and an outer drum. The wall of the inner drum is vertically provided with a plurality of annular knife rests, and the annular knife rests are provided with hanging The extended knife arm, the knife arm is provided with a plurality of blades along the length direction, the cylinder wall of the inner drum is also provided with a number of flow holes, and the flow holes are arranged in an array along the cylinder wall of the inner drum, The bottom of the inner drum is provided with a drive shaft, which is connected to the motor at the bottom of the outer cylinder, and the inner drum is detachably connected to the upper part of the drive shaft.

The invention discloses a self-calibration device and method for an emission rate coefficient of a multi-spectrum radiation temperature measuring system. The device comprises a wide spectrum optical source as well as an incidence collimating lens group and an outgoing collimating lens group which are arranged at the outgoing optical path of the wide spectrum optical source in sequence; a flame to be measured is arranged between the incidence collimating lens group and outgoing collimating lens group. The emission rate coefficient self-calibration system is arranged on the same path, penetrating through the measured flame, of the multi-spectrum radiation temperature measuring system, the emission rate coefficients of the flame under different wavelengths are obtained by recording the spectrum parameters of the wide spectrum optical source, the flame and the combination of the wind spectrum optical source and the flame, and the self-calibration device is used for the parameter calibrating of the multi-spectrum radiation temperature measuring system and overcomes the model error in the traditional theoretical calculation correction, so the measuring uncertainty is reduced.

The invention discloses a graded-response load feedback control system for orchard ditchers and a control method. The graded-response load feedback control system for orchard ditchers is added on a speed regulation actuator and an HST hydraulic stepless speed change system of a ditcher. The rotational speed of a ditcher shaft is monitored in real time by a speed sensor, a controller differentially computes a filtered rotational speed signal ns to obtain the real-time acceleration a of the ditcher shaft, and if a is less than an acceleration threshold a0, then time sampling is triggered. If load change time t is less than a time threshold t0 when the rotational speed ns reaches 0.6n0, which indicates that load is sharply increased, then an electromagnetic clutch is rapidly released, at the same time, an electromagnetic brake rapidly performs braking, and an alarm system gives the alarm; and if t is greater than t0, then the advancing speed of the ditcher is automatically regulated, so that ditching load is decreased to an optimal state. The invention realizes the graded-response load feedback control of the operation of the orchard ditcher, effectively decreases the fault rate of the ditcher, increases the efficiency of operation, and is applicable to the operation of orchard ditchers.

The invention provides a device for measuring a direct current and a method. A primary winding passes through a round iron core T1 and a round iron core T2; an excitation coil N1 is wound on the round iron core T1; an excitation coil N2 and a detection coil N3 are wound on the round iron core T2; excitation coils N1 and N2 are in reverse serial connection onto two ends of an AC modulation voltage source by homonymous ends; two ends of the detection coil N3 are respectively connected with two input ends of a buffer amplifier; the output end of the buffer amplifier is respectively connected with the input end of a positive half-wave peak detector, the input end of a negative half-wave peak detector and the input end of a periodic discharge circuit; and two output ends of the periodic discharge circuit are respectively connected with control ends of the positive half-wave peak detector and the negative half-wave peak detector. The proportion of a peak time difference of distorted voltage sensed by the detection coil to a fixed AC power supply period is used for measuring the direct current, the measurement precision can be effectively improved, demands on an excitation power supply are reduced, and the principle is simple and reliable.

The invention provides a building sand and stone automatic drying and separating method. The method includes the steps of firstly, conveying a sand and stone mixture to the input end of an air dryingmechanism by a conveying device, making the sand and stone mixture vertically fall down, and air-drying the sand and stone mixture when the mixture falls from the input end to the output end; then, discharging the sand and stone mixture from the output end of the air drying mechanism to fall into a sieve tray, heating a filter screen, a built-in boss and a tray bottom by a heater, and drying the sand and stone mixture by the sieve tray; then, driving the sieve tray to rotate by a driving mechanism, screening out sand by the filter screen, and discharging the sand until the sand is all discharged; and finally, driving the tray bottom to float upwards by the driving mechanism so as to open the sieve tray, and discharging stone out of the sieve tray from openings formed in an internal circumferential surface of the built-in boss, and discharging the stone under the guidance of an inclined plate and a discharge hopper. The building sand and stone automatic drying and separating method hasthe beneficial effects that it is avoided that sand and stone are caked due to dampness and are difficult to separate, and the sand and stone which are caked due to dampness can be sufficiently separated.

The invention discloses a multifunctional FRP intelligent anchor pole capable of realizing multi-point temperature compensation. The multifunctional FRP intelligent anchor pole mainly comprises a welding-free long-scale-distance multi-grating sensor, a fiber bragg grating multi-point temperature compensation auxiliary sensor and an FRP anchor pole main body. After being encapsulated, the welding-free long-scale-distance multi-grating sensor and the fiber bragg grating multi-point temperature compensation auxiliary sensor are implanted during production of the FRP anchor pole, so an integral multi-functional FRP intelligent anchor pole is manufactured. The welding-free long-scale-distance multi-grating sensor comprises multiple long-scale-distance multi-grating sensing units which are successively connected in series. The fiber bragg grating multi-point temperature compensation auxiliary sensor comprises multiple optical grating sensing units which are encapsulated in a sleeve and capable of freely sliding in a telescopic manner. The multifunctional FRP intelligent anchor pole can be used for anchoring and reinforcement in related projects such as mineral products, buildings and rock and soil, so bearing ability, stress-strain, damage conditions and the like of the anchor pole can be monitored and convergence, deformation, stability and the like of surrounding rock support and surrounding rock can be well monitored.

The invention relates to a mine belt conveyer state monitoring system, which belongs to the technical field of belt conveyers. The mine belt conveyer state monitoring system comprises a mine belt conveyer, an electromotor (8), a speed reducer (6) and a drive roller (2) in the mine belt conveyer are connected sequentially, and a conveyer belt (3) rounds the drive roller (2). The mine belt conveyer state monitoring system is characterized in that sensor units are arranged on the mine belt conveyer, the sensor units are connected with the input ends of a data acquisition device (5), and the output end of the data acquisition device (5) is connected with an upper computer. Since the sensors are mounted at a number of positions on the mine belt conveyer and the data acquisition device acquires and uploads signals outputted by each sensor, when the output of the sensor at a certain point exceeds a threshold, early warning is carried out in time, and workers can conveniently find the corresponding monitoring point on the mine belt conveyer according to the position of the preset acquisition point to perform the diagnosis, confirmation and maintenance of failure, so that severer failure can be prevented.

The invention discloses electric support rod and rolling groove equipment. The electric support rod and rolling groove equipment comprises a rack, wherein a spring prepressing module, a ball socket direction detection module and a rolling groove part are installed on the rack, the ball socket direction detection module is located between the spring prepressing module and the rolling groove part, and a moving mechanism is arranged at the bottom of the spring prepressing module. The electric support rod and rolling groove equipment of the technical scheme has the advantage of simple and reliableprinciple, and the reliable connection between a support pipe and a ball socket is guaranteed. The electric support rod and rolling groove equipment is not limited to the length of a support rod product, a rolling groove can adapt to the outside diameter of different support pipes, the depth and shape of the rolling groove can be adjusted, the applicability is high, the production efficiency is improved, or the development cycle and cost are reduced.

The invention relates to a line longitudinal differential protection dedicated optical fiber channe on-line monitoring device, which is widely applied to signal monitoring of a special optical fiber channel for line main protection of 110kV and above voltage classes, and belongs to the technical field of power transformation maintenance sites. The device comprises a CPU installed in a shell. The CPU is connected with a power supply board and a communication board; the communication board is provided with four Ethernet ports used for supporting 103 protocol and 61850 protocol communication in astation. The communication board is also provided with two groups of 485 wiring ports. The two groups of 485 wiring ports can be in protection communication with a line with an optical fiber specialchannel and in communication with a protection information substation; the communication board is also provided with a B code time synchronization wiring port used for supporting electric B code timesynchronization. The communication board is also provided with a printer wiring port, the communication board is also connected with three optical fiber interface boards, each optical fiber interfaceboard is provided with four groups of optical fiber input and output interfaces, each optical fiber input and output interface comprises four optical fiber interface, the upper two ports are longitudinal differential protection dedicated optical fiber channel interfaces, and the lower two ports are optical fiber distribution frame optical fiber interfaces. The device is simple and reliable in principle, easy and convenient to install, stable in operation, wide in application range and capable of shortening defect elimination time and remotely positioning a fault area in real time.