66results about How to "Large measuring area" patented technology

A kind of flat capacitance-type sensor includes a flat capacitor, a flat capacitance compensator which eliminate interfere signal and a sensor detecting circuit. The invention adopts double-flat capacitance, thereinto one is used as measuring capacitance; another is as compensating capacitance, it is insensitive with rain water of outer surface by changing mounting position and shape of compensating capacitance, and sensitive with temperature shift and electromagnetic interfere. When there is temperature shift or electromagnetic interfere, the value of measuring capacitance and compensating capacitance change at the same time and extent are similar, when rain water is changed, value of measuring capacitance changes, but value of compensating capacitance does not change. Using characters above can difference compensate measuring of sensor, disadvantageous affects of temperature shift and electromagnetic interfere can be decreased, error action of rain shaving can be avoided.

The invention provides a measurement testing device of external characteristics and internal flow of a fused salt model pump. The measurement testing device of external characteristics and internal flow of the fused salt model pump is mainly used for measuring the external characteristics and an internal velocity field of the fused salt model pump, and carrying out shooting and research of high-speed flow inside the fused salt model pump. The measurement testing device of external characteristics and internal flow of the fused salt model pump mainly comprises a pipeline system, a power transmission system, a model pump, an external characteristic data acquisition and analysis system and an internal flow measurement system. Arrangement of the pipeline system ensures an enough operating space, high measurement accuracy and convenience of testing when tests are carried out. The power transmission system provides power for stable operation of the fused salt model pump. An impeller and a pump supporting seat of the fused salt model pump are made of stainless steel, other components of the fused salt model pump are made of organic glass, and the fused salt model pump has the advantages of being good in hydraulic performance, high in strength, wide in measurable area and the like. The external characteristic data acquisition and analysis system collects signals of pressure, revolving speed, torque, flow and the like, the signals are processed and analyzed, and the external characteristics of the fused salt model pump are obtained. The internal flow measurement system can carry out peak inverse voltage (PIV) measurement to the internal velocity field of the fused salt model pump, carries out internal peeping high-speed imaging to internal flow of the fused salt model pump, and achieves research of an internal whole flow field of fused salt model pump.

The invention belongs to the technical field of crystal structure measurement through measuring back scattering, and relates to a method for measuring the orientation differences of orientation silicon steel crystal particles by utilizing an EBSD (Electron Back-Scattered Diffraction) technique. The method provided by the invention comprises the following steps of: measuring the euler angle of each crystal particle in a taken test sample by adopting the principle of detecting the crystal particle orientation by adopting the EBSD, and calculating the orientation differences of adjacent crystal particles and the orientation differences between the crystal particles and a standard goss texture, thereby obtaining the corresponding relationships between the magnetic induction intensity and the orientation differences. The method has the advantages of, rapid measurement speed, large measurement region, intuitive and understandable expression, typical obtained result and the like, and is simple to operate.

The sensor is a pair of planar electrodes in some interval formed on the inner surface of automobile glass via adhering, pressing, painting or plating conductor, and electrode pair constitutes one planar capacitor via glass and near dielectric space. When some rain drops or other foreign matter attach to the outer surface of the glass, there will be changes in the average dielectric constant, the area covered by the planar capacitor plates and the minor axis radius of the dielectric space and thus change in capacitance, and the intelligent adaptive signal amplifying and processing unit with microprocessor detects the change in capacitance and converts it into digital signal to drive the control unit of the automatic windscreen wiper system.

A handling device for electronic chip components includes an indexing table having a plurality of cavities for holding electronic chip components therein and a circulatory feeder for supplying the electronic chip components to the indexing table. One or more cavities are simultaneously disposed at a location which comes close to the circulatory feeder and, by performing a suction operation in the cavities, the electronic chip components are directly put into the cavities, without moving the electronic chip components along the main surface of the indexing table.

The invention relates to a photo-etching projector's focus plat tuning sensor and its technology, especially a focus plat tuning sensor with projection network and detection network. It comprises two mutually perpendicular branches with each branch comprises two measuring optical path and two reference optical path, wherein measuring optical path measures the height of relative projection objective's optimum focal surface of base plate surface, reference optical path measures the height of projection objective's surface, four optical paths of each branch shares imaging system, the measuring optical path has water opening which can change measuring flare.

The invention relates to the technical field of metallurgy, in particular to a slab length measurement device, which comprises a first ranging unit, a second ranging unit, a third ranging unit, a fourth ranging unit, a control unit and an upper computer for providing slab length specification parameters. The first ranging unit, the second ranging unit, the third ranging unit and the fourth ranging unit are respectively connected with the control unit. The first ranging unit and the third ranging unit are respectively aligned with the front end of a slab. The second ranging unit and the fourth ranging unit are respectively aligned with the rear end of the slab. The control unit is connected with the upper computer. The invention also provides a measurement method for the slab length measurement device, which works out the length of the slab according to the distance and angle relation between the ranging units and the slab. The slab length obtained by the slab length measurement device and the measurement method thereof can reduce errors in slab length measurement caused by the leftward and rightward inclination of the slab, so that the measured slab length value can be more approximated to a true value.

The invention discloses an automatic energy dispersive X-ray fluorescence analysis test platform. The automatic energy dispersive X-ray fluorescence analysis test platform comprises a sample chamber, a stepping motor and an electric cylinder. The sample chamber and a seal plate form a closed chamber. The stepping motor is fixed to a tray. The tray is connected to a bracket. The bracket is connected to the electric cylinder. A rotation shaft of the stepping motor passes through the seal plate and enters into the closed chamber. The rotation shaft of the stepping motor is provided with a sample support. The sample chamber is provided with an X-ray pipe, a camera and a detector. The closed chamber is communicated with a vacuum pump. The camera is connected to a computer. The automatic energy dispersive X-ray fluorescence analysis test platform reduces measure errors, reduces detector-caused pollution, improves a light element detection capability and improves detection efficiency.

The invention discloses a UWB-array-based automatic obstacle avoidance system and method for a drone. The system comprises a collecting unit, a receiving unit, a judging unit, a control unit and an actuator. UWB range sensor arrays assembled in the collecting unit in multiple directions collect the distance data between an obstacle and a drone body, the receiving unit receives the sensing data transmitted by the collecting unit, the judging unit resolves the distance data transmitted by the UWB sensors into distance, the course of the drone is changed into preset course when the distance is smaller than preset distance, and flying height and flying attitude are regulated to avoid the obstacle. The system has the advantages that the problems that the drone cannot avoid the obstacle under a narrow scene and cannot achieve comprehensive obstacle avoidance in the prior art are solved, the system is reliable, real-time, accurate and capable of effectively preventing drone body damage and preventing the drone from destroying other objects during flight, and the like.

The invention relates to a communication type piezoresistive array, belonging to the technical field of sensors. The communication type piezoresistive array comprises a bottom layer packaging film, a top layer packaging film, and a piezoresistive sensitive film between the bottom layer packaging film and the top layer packaging film. The bottom layer packaging film is formed by an inner side insulation film with a window and an outer side insulation film covered by an electrode array. The structure, size and electrode number of the top layer packaging film are the same with that of the bottom layer packaging film. The sensing sub unit total number of the communication type piezoresistive array is the same with the electrode number of the bottom layer packaging film. Two output signal ends of each sensing sub unit are the electrode of the bottom layer packaging film and the electrode of the top layer packaging film opposite to the bottom layer packaging film. One piezoresistive film is shared by all sensing sub units in the communication type piezoresistive array, and force which acts on any one area in the communication type piezoresistive array causes the change of all sensing sub unit output signals. By using the communication type piezoresistive array designed in the invention, a measurement blind area can be eliminated, and the measurement area of the piezoresistive array can be expanded.

A height measuring platform comprises a bottom plate and a guide column arranged on the bottom plate. A moving block capable of moving up and down is sleeved on the guide column, a measurer is arranged on the moving block, a power device for driving the moving block to move up and down is further arranged on the guide column, the bottom plate is made of marble, a measurement reference is guaranteed by using the bottom plate made of the marble with high flatness, the measurer is connected with the moving block by a fixing plate, and an adjuster for controlling running of the power device is further arranged on the bottom plate and is electrically connected with the power device. The height measuring platform is simple in structure and convenient to use, and can quickly measure the height of a regular or irregular object or local height difference of the regular or irregular object.

The invention discloses a concave grating diffraction efficiency test instrument, which comprises a light source system, a measuring monochromator and a Fourier spectrum measurement system, wherein the Fourier spectrum measurement system comprises a second casing, a collimating mirror, a beam splitting cube, a fixed pyramid A, a movable pyramid A and a collecting mirror; the second casing is provided with a second incident hole; the collimating mirror, the beam splitting cube A, the fixed pyramid A, the movable pyramid A and the collecting mirror are arranged in the second casing and are in sequential arrangement in the light path transmission direction; the light emitted into the first casing through a first incident hole can be directly irradiated onto an element to be tested arranged on a support able, is gathered onto an emergent arm through an element to be measured, and is further irradiated onto a main detector through the emergent arm. The concave grating diffraction efficiency test instrument can effectively solve the problems that the concave gating to be tested and a standard reflecting mirror have different emergent spectrum width; the grating lamination exists; the instrument stray light is great; the light source stability is poor; the measurement precision is influenced.

The invention provides a positioning target, a visual measurement system and a method for acquiring flatness based on the positioning target and the visual measurement system. The positioning target comprises an active light-emitting lamp source, at least three high-precision spheres are arranged at the bottom of the lamp source and are not located on the same straight line, and a control mainboard is installed on the lamp source and used for sending a measurement instruction according to set time. The visual measurement system adopts the positioning target. The method for acquiringthe flatness comprises the following steps of fixing the visual measurement system, placing the positioning target at a to-be-measured part, and detecting the central coordinate of the positioning target throughthe visual measurement system,moving the positioning target to collect m points at the to-be-measured part and fitting to obtain a reference plane S',and continuously moving the positioning target toacquire the coordinate Pi of the ith point, and calculating the vertical distance from the coordinate Pi of the ith point to the virtual plane S'to serve as the plane deviation degree of the currentmeasurement point. The method has the advantages of high repeatability, high precision, high efficiency, interference resistance, light and small size, convenience in carrying and operation and the like.

The invention discloses a vertical motor vehicle tail gas remote sensing detection system, which comprises a U-shaped optical path vertical type remote sensing detection device, an L rod, an LED display screen, an electric cabinet and a data monitoring platform, wherein the U-shaped optical path vertical type remote sensing detection device comprises a portal frame, a light source emitting device,a light source receiving device, a detection light beam, a sapphire lens, a reflection regression lens box and a reflection lens; the L rod comprises an atmospherium, a monitoring camera, a light supplementing lamp, speed measuring radar and a vehicle license plate snapping unit; the electric cabinet comprises an interchanger, an industrial personal computer and an equipment power supply. The vertical motor vehicle tail gas remote sensing detection system solves the problems that a conventional motor vehicle detection device cannot distinguish the tail gas content of each motor vehicle when more than two vehicles pass through the device at the same time, and also solves the problem that invalid is generated when the vehicle driving position and the exhaust pipe position are not in the middle of a road.

A motion sensor which has a coil that surrounds a ferromagnetic core and at least one magnet that is longitudinally movable along the coil. The magnet causes a magnetic saturation of the ferromagnetic core in an associated zone that covers a portion of the length of the coil. An evaluation unit generates a position signal in dependence on the position of the movable magnet along the longitudinal extent of the coil. The coil has at least two superimposed winding layers that surround the ferromagnetic core and are wound in opposite directions. The windings of adjacent segments generally have about the same width over which the winding density remains constant. Thus, the winding density of the segments of one of the winding layers increases linearly over the length of the sensor while the winding density of the segments in the other winding layer linearly decreases over the sensor length.

The invention belongs to the field of geophysical measurement, and particularly discloses a marine gravity strip-shaped measurement method based on an unmanned platform. The invention discloses a method for carrying out strip-shaped measurement by utilizing the unmanned platform to obtain a gridding gravity / gravity anomaly graph in view of the problems of low efficiency, long time period and existence of time deviation which can affect the drawing of a global or regional gravity / gravity anomaly graph when a ship is designed to run a plurality of navigation routes for parallel measurement in common ship load gravity measurement, so that the drawing efficiency and precision are greatly improved, and the efficiency-cost ratio can also be improved to a certain extent. Through a designed instrument installation mode and a ship measurement and arrangement method, the purpose of acquiring a plurality of measuring lines and a plurality of cross points at one time can be achieved by being equivalent to a plurality of geophysical measurement ships sailing in parallel on the sea, and the determination of the marine gravity field is completed.

The invention relates to a method for predicting an initiation location or an expansion direction of cracks on a metal surface, and belongs to the technical field of mechanical behaviors of materials,and the method comprises the following steps of observing the microstructure after electrochemical polishing and corrosion on the surface of the metal material to be measured, and depositing a layerof metal in the physical vapor phase on the metal surface after exposure and development of the mask plate and photoresist on the metal surface by a photoengraving machine, so as to form a regular grid shape; using SEM-EBSD to characterize the crystal orientation of the material surface in the grid area to be measured; measuring the change of the relative coordinate values of grid node before andafter plastic deformation of the material surface, and accordingly calculating and analyzing the information such as the strain concentration distribution of the micro area, the strain concentration area and plastic deformation direction, and determining the dislocation slip direction of the material surface, so as to predict the initiation location and expansion direction of cracks on the metal surface. The invention realizes the method for predicting an initiation location or an expansion direction of cracks on a metal surface by the combination of a physical vapor deposition mesh method anda SEM-EBSD method.

The invention discloses a spaceflight friction resistance sensor based on K-shaped pipe differential pressure measurement. A vertical straight hole is formed in the front portion of the upper surface of a gauge outfit base body of the gauge outfit structure of the spaceflight friction resistance sensor in the airflow direction, an inclined hole inclining downwards is formed in the rear portion of the upper surface of the gauge outfit base body in the airflow direction, the included angle between the inclined hole and the horizontal direction is an inclination angle alpha, and the inclination angle alpha ranges from 20 degrees to 30 degrees. The straight hole is connected to the inlet end of a three-way joint through a connecting pipe I and a pressure measuring hose I in sequence, one outlet end of the three-way joint is connected to a measuring port I of a transmitter body of the high-precision differential pressure micro-pressure transmitter through a pressure measuring hose II, and the other outlet end of the three-way joint is connected with a micro pressure sensor; and the inclined hole is connected to a measuring port II of a transmitter body of the high-precision differential pressure micro-pressure transmitter through a connecting pipe II and a pressure measuring hose III in sequence. The spaceflight friction resistance sensor is high in measuring precision, compact in structure, convenient to carry and capable of meeting the requirement for measuring the surface friction resistance of the hypersonic flight vehicle under the flight condition.

The invention relates to a coal angle of repose automatic measurement method by using two radars. The method includes the following steps that: (1) two radars are installed on the big arm of a stacker; (2) the stacker is controlled to move on a slop parallel to a coal pile, when the big arm of the stacker rotates to a position where the two radars can both detect the coal pile, measurement is started, a vertical distance from the radars to the coal pile is required distance information; and (3) during the movement process of the stacker, the change range of the angle of repose of the coal is put into statistics, and the data information of the angle of repose of the coal is analyzed, error data are extracted, and a program outputs the measured change range of the angle of repose of the coal. With the method of the invention adopted, the stacker is automatically and manually operated to rotate or walk, after the distance information is obtained through the two radars, the change range of the angle of repose of the coal can be automatically calculated according to the calculation formula of the angle of repose of the coal, and the information of the angle of repose of the coal can be obtained accurately. The method has the advantages of relatively high measurement efficiency and relatively large measurement area, and can assist in saving costs.

The invention discloses a river flow velocity measuring apparatus in an environmental flow determination system. The river flow velocity measuring apparatus comprises a first fixing rod, a second fixing rod, a fixing rope, a pulley, a transmission rope roller, a transmission rope, a motor, a counterweight, a heating resistance wire, a temperature sensor plate, and a statistic unit. The heating resistance wire and the temperature sensor plate are fixed to the transmission rope. River water flows past the heating resistance wire and the temperature sensor plate. A power supply is connected with the heating resistance wire through the transmission rope. The temperature of the heating resistance wire is constant. The temperature sensor plate is connected with the statistic unit through the transmission rope. The statistic unit receives a water temperature signal and a time interval signal transmitted from the temperature sensor plate, and sends a river flow velocity signal. The river flow velocity measuring apparatus uses the spiral heating resistance wire and the water flow direction is arranged in the axis of the heating resistance wire such that the river flow velocity measuring apparatus has little influence on water flow velocity and reduces measurement errors.

The invention provides a piezoelectric sensor pre-tightening device, belongs to the field of sensors and measuring and control devices of the sensors and particularly relates to application of a piezoelectric quartz sensor in the field of three-dimensional force measurement. The piezoelectric sensor pre-tightening device consists of a stress block, an upper three-dimensional piezoelectric sensor, a lower three-dimensional piezoelectric sensor, a stud, a nut, an upper press block, a lower press block and a plurality of T-shaped groove nuts. The piezoelectric sensor pre-tightening device eliminates interference brought by pre-tightening force change by using the two sensors, avoids direct contact between an elastic pre-tightening part and the stress block, accordingly eliminates the influence on outputting, of the pre-tightening force change, when the pre-tightening part is stressed to deform, and improves consistency and accuracy of area measurement. The piezoelectric sensor pre-tightening device can perform three-dimensional force measurement, and a reliable measurement area can be further expanded through combined usage. The piezoelectric sensor pre-tightening device is simple in structure, easy to adjust, flexible and convenient to use and wide in application.

The invention discloses a large-stroke single-point displacement measuring device for wind tunnel supersonic flow calibration and a wiring method, and relates to the technical field of wind tunnel supersonic flow field calibration. The large-stroke single-point displacement measuring device is characterized by comprising a wind tunnel wall plate, a tail support, a main support, an executing mechanism, a connecting section, a probe switching section and a pressure measuring part, wherein the executing mechanism is a servo electric cylinder, the pressure measuring part comprises a total pressureprobe and a static pressure probe, the total pressure probe and the static pressure probe are connected with a measuring pipeline, the measuring pipeline is fixedly wound with a piston rod of the servo electric cylinder, and the measuring pipeline is connected with a balance weight located outside the wind tunnel. According to the single-point moving measurement device, the stroke of the executing mechanism is increased, the measurement area is wider, the measurement pipeline wiring structure of the device is simple, cost is low, wiring of the measurement pipeline is close to the device, theinterference of turbulent airflow in a wind tunnel on the measurement pipeline is reduced, the blockage degree of the device is reduced, and the device is economical and practical, meanwhile, the device is high in position control precision, more reliable in measurement data and convenient to operate and maintain.

The invention discloses an alphagamma pollution meter for surfaces of hands and feet. The meet comprises a casing, a foot detector, a touch display screen and a hand detector; each of the foot and hand detectors comprises a flickering detector, a flickering crystal and a signal collection and processing unit; the flickering detector collects a light signal emitted by the flickering crystal, and sends the light signal to the signal collection and processing unit; and the casing internally comprises a communication module, a signal processing circuit, a power supply module and a data communication module, the signal collection and processing unit is connected with the power supply module and the communication module, the communication module is connected with the signal processing circuit todiscriminate detected alpha and / or gamma ray signals, and the signal processing circuit is connected with the data communication module to transmit an obtained result to the touch display screen. Themeter of an integrated design is characterized by man-machine interaction response, automatic measurement data storage, large measurement area, high sealing performance, easy decontamination and simultaneous measurement of alpha and beta radioactive pollution.

The invention relates to a device and method for monitoring the deformation of a roof in a roadway head-on suspending roof area, which are suitable for mines and geotechnical engineering. The monitoring device is composed of a fixing machine tool and a measuring rod, wherein the fixing machine tool is installed on a head-on roof anchor rod during monitoring and is kept fixed in the monitoring point utilization process, the measuring rod changes the monitoring direction by being embedded into different measuring holes of the fixing machine tool, the monitoring length is changed by adjusting thelength of the measuring rod, and the fixing machine tool and the measuring rod cooperate with each other to monitor different areas of the suspending roof area. In the monitoring process, one end ofthe measuring rod is in contact with a measuring point of the suspending roof area according to the lever principle, the length of the measuring rod and the included angle between the measuring rod and the vertical line are recorded, the vertical height between the measuring point and the other end of the measuring rod is obtained through calculation, and the vertical height difference obtained through two-time measurement is the deformation of the measuring point. The roof deformation monitoring device is convenient to install, easy to operate, wide in monitoring range, low in cost, high in utilization rate and safety and accurate in result, and inaccuracy and high danger of roof deformation monitoring in the suspending roof area can be effectively reduced.

A motion sensor which has a coil that surrounds a ferromagnetic core and at least one magnet that is longitudinally movable along the coil. The magnet causes a magnetic saturation of the ferromagnetic core in an associated zone that covers a portion of the length of the coil. An evaluation unit generates a position signal in dependence on the position of the movable magnet along the longitudinal extent of the coil. The coil has at least two superimposed winding layers that surround the ferromagnetic core and are wound in opposite directions. The windings of adjacent segments generally have about the same width over which the winding density remains constant. Thus, the winding density of the segments of one of the winding layers increases linearly over the length of the sensor while the winding density of the segments in the other winding layer linearly decreases over the sensor length.

The invention discloses a river flow velocity measuring apparatus in an environmental flow determination system. The river flow velocity measuring apparatus comprises a first fixing rod, a second fixing rod, a fixing rope, a pulley, a transmission rope roller, a transmission rope, a motor, a counterweight, a heating resistance wire, a temperature sensor plate, and a statistic unit. The heating resistance wire and the temperature sensor plate are fixed to the transmission rope. River water flows past the heating resistance wire and the temperature sensor plate. A power supply is connected with the heating resistance wire through the transmission rope. The temperature of the heating resistance wire is constant. The temperature sensor plate is connected with the statistic unit through the transmission rope. The statistic unit receives a water temperature signal and a time interval signal transmitted from the temperature sensor plate, and sends a river flow velocity signal. The river flow velocity measuring apparatus uses the spiral heating resistance wire and the water flow direction is arranged in the axis of the heating resistance wire such that the river flow velocity measuring apparatus has little influence on water flow velocity and reduces measurement errors.