148results about How to "Flexible measurement" patented technology

The invention discloses a water quality sensing device with an automatic cleaning function. The water quality sensing device comprises a vertical supporting part, a cleaning structure and a sensing driving structure, wherein the sensing driving structure does reciprocating rotation around a rotating shaft; the sensing driving structure comprises a motor, a driving rod and a sensing probe; the driving rod does reciprocating movement under the driving of the motor; and when the sensing driving structure rotates to the cleaning structure, and the cleaning structure cleans the sensing probe. By the water quality sensing device, when a water body does not need to be detected, the driving rod takes the sensing probe out of water, so that the sensing probe cannot be influenced continuously by impurities in water and the speed the sensing probe is influenced by impurities can be slowed down greatly; when a water body needs to be detected, the driving rod puts the sensing probe into water; aims of flexible measurement and reduction of influence of impurities are fulfilled; and furthermore, when the probe needs to be cleaned, the sensing driving structure rotates around the rotating shaft, so that the probe is rotated to the cleaning structure to be scrubbed and cleaned.

The invention discloses a large-scale antenna field directional diagram measuring system and method for multi-rotor unmanned aerial vehicles. The system includes a multi-rotor unmanned aerial vehiclesubsystem, a signal source link subsystem, a receiving link subsystem and a data processing subsystem. A multi-rotor unmanned aerial vehicle is used to fly at near and far field areas of a to-be-measured antenna according to a set cruise mission; through remote real-time control on a signal source link module, an electromagnetic wave signal in the air can be swept and received in real time; and through the screening, error compensation and data fitting on a received level signal, final directional diagram information can be generated, and the maximum radiation direction, 3dB lobe width, sidelobe level, front-to-back ratios and corresponding position information can be given. On-the-spot directional diagram performance measuring of large-scale antennas under service status can be realized,so that accurate measured data can be provided for fault diagnosis; the system is convenient in operation, high in degree of automation and simple in dismounting; and single sortie flight can accomplish the testing of multifrequency directional diagrams.

The invention discloses a method for detecting the geometrical motion error of triaxial numerical control equipment in the technical field of mechanical detection. In accordance with the characteristic that a plane grating can measure the linear motion error and the circular motion error of the triaxial numerical control equipment, the method separates 12 error components including the linear error, the position error and the vertical error of a guide rail X, a guide rail Y and a guide rail Z, and then separates 9 rotation angle error components of the three guide rails.

The invention provides a method and a system for measuring parameters of round holes in a plate. The method comprises the following steps: obtaining inner and outer parameters of a multi-view camera; performing image acquisition on the plate by utilizing the multi-view camera to obtain a local plane grey image of the plate; obtaining pixel values of characteristic parameters of linear segment end points and the round holes in the plate according to the local plane grey image; determining local space parameters of the round holes in each pair of binocular camera coordinate systems according to the pixel values of the characteristic parameters of the round holes in the local plane grey image and the inner and outer parameters of the multi-view camera; switching and concatenating the local space parameters of the round holes in each pair of binocular camera coordinate systems through the inner and outer parameters of the multi-view camera, and determining overall space information of the round holes in the plate. According to the scheme, the measurement precision and the completeness of the holes in the plate are improved, the measurement speed of the holes in the plate is increased, and the measurement cost of the holes in the plate is reduced.

The invention provides a measuring method and a measuring device of conduit connector space pose parameters. The method includes: obtaining inner parameters of a multi-view camera; reading three-dimensional models of conduit connectors to obtain contour wireframe models of the conduit connectors; respectively building a spherical coordinate system and a plurality of virtual cameras in different positions; obtaining two-dimensional images, projected on the plurality of virtual cameras in the different positions, of the contour wireframe models; through the multi-view camera, respectively carrying out image acquisition on the plurality of connectors on a conduit to obtain plane gray level images of the conduit connectors; processing the two-dimensional images and the plane gray level images to be matching templates and search images with an edge filter, and carrying out template matching based on shapes on the search images; obtaining the space pose parameters of the plurality of conduit connectors in respective camera coordinate systems; and unifying poses of the plurality of conduit connectors in the camera coordinate systems in a world coordinate system to confirm the conduit connector space pose parameters. In the process of measuring the conduit connector space pose parameters, the speed is high, and the accuracy is high.

The invention relates to a contact and non-contact type dual-purpose surface roughness measuring system which comprises a measuring sensor a computer and is characterized in that the computer is connected and provided with two groups of measuring sensors through measurement and data acquisition circuit, and the two groups of measuring sensors are respectively a non-contact type measuring head and a contact type measuring head. The contact and non-contact type dual-purpose surface roughness measuring system can realize the contact and non-contact type engineering surface roughness measuring method through a measuring instrument, centralize the advantages of contact type and non-contact type, enlarge the range of measuring objects, reduce the cost, provide the precise and reasonable measuring data, implement the real-time contrast and deviation correction for the two measuring results, and be applied to the two-dimensional or three-dimensional mark measurement of engineering roughness of various complex workpiece surfaces to be measured.

The invention provides an uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method, relating to the channel measuring technology. The downlink antenna pulling away device used for distributed multilink multiple antenna broadband channel measuring system comprises an electro-optic converter used for modulating a radio frequency signal emitted by the transmitting unit of the distributed multilink multiple antenna broadband channel measuring system into an optical signal, an optical fiber which is connected with the electro-optic converter and is used for transmitting the optical signal generated by modulation of the electro-optic converter as well as an antenna pulling away unit which is connected with the optical fiber, comprises an optic-electro converter connected with the optical fiber and is used for receiving the optical signal transmitted by the optical fiber and demodulating the optical signal into the radio frequency signal. By the embodiment of the invention, the measuring on distributed channel can be more flexible and convenient.

The invention relates to full-automatic contact type measuring equipment and method. The full-automatic contact type measuring equipment comprises a test bench, a longitudinal sliding table and a cross beam, wherein the longitudinal sliding table is longitudinally and slidably arranged on the test bench and can be used for fixedly placing a measured workpiece, the cross beam is suspended above thetest bench, and at least one measuring arm which can move back and forth along the cross beam is arranged on the cross beam. Compared with the prior art, the equipment in the invention is the equipment specially for rapid and high-precision measurement of the geometric dimension of the large-size workpieces with pores and burrs on the surface, the size of the workpiece is measured by means of a contact type displacement sensor, the defects of the existing measuring method are avoided, so that the influence of the pores and burrs on the surface of the workpiece on precision can be avoided by the measuring equipment, the measurement of the large-size workpiece is more efficient and accurate, relatively complicated workpiece shapes can be adapted to, various dimensions of the thickness, theperpendicularity, the parallelism, the flatness and the like can be measured; meanwhile, the cost of the measuring equipment is lower, and the maintenance and the calibration are simpler and more convenient.

Provided is a needle-plate electrode medium space charge and partial-discharge ultrahigh-frequency signal synchronous measurement device in the field of electric variable measuring. An inner insulation piece is arranged in the middle of an outer insulation piece in a sleeved mode. The outer side of the inner insulation piece is provided with a tooth structure. The top end of a needle electrode is provided with a metal voltage-sharing ball. The bottom end of the needle electrode penetrates through middle through holes of the inner insulation piece and the outer insulation piece respectively. A height adjusting gear is matched with the tooth structure on the outer insulation piece. By rotating the height adjusting gear, the relative positions of the inner insulation piece and the outer insulation piece are adjusted, the proper distance between the needle electrode and a lower electrode is selected, a voltage pulse is applied at the top end of the needle electrode, vibration of a liquid oil sample to be detected is generated, mechanical wave signals are sent out, the mechanical wave signals are received by a piezoelectric film and are converted into voltage signals, and accordingly space charge distribution in the liquid oil sample to be detected is reflected. Space charge and partial-discharge ultrahigh-frequency signal synchronous measurement under needle-plate electrodes of liquid or solid media is achieved.

The invention discloses an adjustable deviation prevention device based on a cable detection robot. The adjustable deviation prevention device comprises a support shaft connected with a cable detection robot support leg, a fixing frame arranged on the support shaft, a deviation prevention support frame connected with the support shaft, a stepped shaft connected with the deviation prevention support frame, and a deviation prevention wheel arranged on the stepped shaft. The support shaft passes through the fixing frame; meanwhile, two horizontal extension plates are arranged on the bottom side of the fixing frame, one side is clamped on the cable detection robot support leg, and the other side is clamped on the deviation prevention support frame, so that one face of the fixing frame is attached to the support leg, and the other face of the fixing frame is attached to the deviation prevention support frame.

The invention discloses an integrated measuring device and method for the flow velocity and the depth of a flume test. The integrated measuring device for the flow velocity and the depth of the flumetest comprises a measuring device body, and the measuring device body comprises a measuring instrument and a monitoring probe; the integrated measuring device further comprises switching assemblies for mutual switching of velocity measuring and depth measuring and further comprises an adjusting device for adjusting the position of the measuring device body, and the adjusting device comprises a left-right position adjusting assembly, a front-rear position adjusting assembly and a height adjusting assembly; and the switching assemblies are connected with the height adjusting assembly. Accordingto the integrated measuring device, velocity measuring and depth measuring can be converted, and a depth measuring device and a velocity measuring device are integrated; the problems that traditionalequipment is limited in measuring space, inflexible in moving, complex in operation and long in consumed time can be effectively solved; and compared with a traditional flume scouring test, the integrated measuring device for the flow velocity and the depth of the flume test is simple in structure, small in occupied space, convenient to operate and high in efficiency.

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 a three-dimensional profile measuring system of a trinocular camera with a two-dimensional laser profile scanning sensor. The system comprises a camera array, a camera array base, a frame synchronous triggering device, a handheld laser profile scanner and a computer, wherein the camera array is placed on the camera array base; the camera array and the handheld laser profile scanner are connected with the computer by collecting cards; the frame synchronous triggering device receives a control instruction of the computer through a serial port so as to control the camera array and the handheld laser profile scanner to synchronously collect image data; and the collected data is transmitted to the computer by the collecting cards. Advantages of a photography measurement technology and the two-dimensional laser profile scanning sensor are combined in the system; high accuracy and flexibility in measurement are achieved; a plurality of object planes of a large-sized complex object can be flexibly measured through the two-dimensional laser profile scanning sensor in one camera view plane; moreover, objects with internal profiles, such as tires and the like, can be detected, so that a profile shielding problem is avoided.

The invention belongs to the technical field of electromagnetic induction, in particular relates to a device for real-time measurement of fluid conductivity by use of electromagnetic method, and aims at the conditions of low fluid conductivity, and little effect on the amplitude of electromagnetic mutual inductance signals; the device uses a method of excitation frequency adjusting and phase component extracting to replace the amplitude for extraction of useful information to the maximum in order to obtain the most accurate measurement results; aiming at the condition that the measurement of fluid conductivity by use of the electromagnetic method is susceptible to the interference of the surrounding electromagnetic environment, the device uses a method of real-time calibration and probe shielding to prevent measurement result drift caused by electromagnetic interference; and aiming at the problem that the high frequency signal transmission is susceptible to noise interference when the fluid conductivity is low and the excitation signal frequency is high, the device uses a method of coaxial cable shielding for signal transmission to ensure the signal stability and reliability.

The invention provides a dual-probe manual ultrasonic detection method, and belongs to the field of conventional A ultrasonic detection. The method is a new detection method which is added when a manual A ultrasonic detection reflection method is used for performing normal detection. Particularly, main characteristics that a reflection angle of acoustic beams of ultrasonic waves in the same medium is equal to an incidence angle, wave mode switching is performed, and the like are used; two discrete probes, namely, a transmitting probe and a receiving probe, are used; and the position of the receiving probe is changed, so that direction flaws which form certain angles with the incidence acoustic beams are detected.

The invention provides a body height measurement method and a body height measurement system and a portable device. The body height measurement method comprises the following steps: calculating the double-step length of a tested person; determining the body height level of the tested person according to the double-step length, wherein the body height level comprises the tall height, the medium height and the short height; analyzing to determine the footprint length of the tested person, wherein the footprint length is the length of the footprint of the tested person; and calculating the body height of the tested person according to the body height level, the double-step length and the footprint length. With the adoption of the body height measurement method, the direct measurement for the height of the tested person is avoided, meanwhile, the height of the tested person can be flexibly measured anytime and anywhere, therefore, the body height of the tested person can be obtained flexibly and conveniently, and meanwhile, the accurate body height measurement result can be obtained.

The invention discloses a non-contact three-dimensional automatic scanning testing system, and the system comprises a positioner, a portal frame, a robot, a measurement workpiece, and a data processing control system. The positioner comprises two supports and a rotating clamping device. The portal frame comprises two X-axis moving guide rails for a walking mechanism, two Y-axis moving support columns, and one Z-axis moving cross beam. The tops of the Y-axis moving support columns are provided with the Z-axis moving cross beam, and the Z-axis moving cross beam is provided with a moving guide rail and a robot installation support. The robot installation support is provided with a flange seat, and a robot is fixedly installed on the flange seat. An end part of the robot is provided with a 3Dscanning measurer. The 3D scanning measurer comprises a camera and a projector, and the data processing control system comprises a robot control cabinet, an electrical control cabinet, and a PLC operating system. The robot control cabinet is electrically connected with the robot. According to the technical scheme of the invention, the travel control range can be enlarged, and the measurement precision and detection efficiency are improved. The system timely collects, processes and displays the measurement data, and can meet the requirements of various angles, precisions and speeds of differentworkpieces, and can be widely used for online application.

The invention provides handheld radar for measuring the surface velocity of a river-way. The radar comprises a radar module, a processing module and a display module, wherein the radar module is used for transmitting a first radar wave to a liquid surface of the river-way and receiving a second radar wave reflected by the liquid surface, so as to generate Doppler beat frequency signals; the processing module is used for acquiring the angle of an incidence liquid surface of the first radar, and outputting the surface velocity by combining the Doppler beat frequency signals; and the display module is used for displaying the surface velocity. Compared with the prior art, the handheld radar provided by the invention can calculate the surface velocity according to the radar wave reflected by the radar module and the radar wave reflected by waves; furthermore, the handheld radar can be used for measuring the surface velocity precisely in a non-contact way in case of high-speed water current, sewage and floaters, even debris flow and slurry.