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

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.

The invention provides a detection device for surface roughness, which comprises a light source unit and a photoelectric detector. Light which is emitted by the light source unit is radiated on the measured surface; the photoelectric detector detects a detection signal which is obtained by the light which is reflected by the measured surface; the measured surface, a light shaft of the detection device and the photoelectric detector are positioned in a same plane; the measured surface is arranged by forming a first angle with the light shaft; and the photoelectric detector is arranged by forming a second angle with the light shaft, thereby preventing the light from being reflected back to the measured surface from the photoelectric detector. The detection device of surface roughness can not only avoid the impacts of the reflected light on the measurement result, but can also reduce an absorption device and further reduce the costs.

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 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.

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 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 belongs to the field of fluid measurement and discloses a three-dimensional wake field testing device which comprises a bracket, sensor bases, a guide ring, guide rods and guide blades;the bracket is used for connecting a component to be tested; the sensor bases are arranged on the guide ring and are used for mounting sensors; the guide ring comprises an inner ring and an outer ring; and multiple guide rods are distributed on the inner ring and the outer ring respectively and are used for connecting the guide blades and the guide ring. By adopting the three-dimensional wake field testing device provided by the invention, the guide rods realizes regulation of front-and-back relative positions of the outer ring and the inner ring by regulating self lengths so as to regulate measurement angles of the sensors; and the guide blades are distributed on the outer surface of the bracket and drives the inner ring and/or the outer ring to rotate by rotating along the outer surfaceof the bracket so as to drive the sensor bases to rotate, so that a measurement region of each sensor on the corresponding sensor base is regulated. Through the three-dimensional wake field testing device, the problems of difficulty in arrangement of the sensors, inconvenience in mounting and the like are effectively solved, a measurement result is accurate and visual, and very large help is provided to performing, operation and data collection of a water test.

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 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 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 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.

The invention relates to the technical field of measurement, and discloses a lifting type measuring apparatus supporting tripod which comprises a support. Three expansion brackets are hinged to the bottom of the support. A fixed base is fixedly arranged on the top of the support. A round groove is formed in the center of the top of the fixed base. A drum is rotationally connected into the round groove through a first bearing. A fixed cylinder is arranged in the drum. The bottom end of the fixed cylinder is fixedly connected with the fixed base. A screw matched with the fixed cylinder is arranged in the fixed cylinder. A slider is fixedly connected with the bottom of the side wall of the screw. A guide notch matched with the slider is formed in the side wall of the fixed cylinder. A nut isfixedly connected with the inner top of the drum. The screw penetrates through the nut and is in threaded connection with the nut. The top end of the screw is connected with an apparatus placing rack.The height of the measuring apparatus can be adjusted by rotating the drum to move the screw up and down, different heights can be conveniently measured, the height can be easily and conveniently adjusted, there is no need to adjust the length of the expansion brackets, and the measuring efficiency can be easily improved.