30results about How to "High accuracy of measurement data" patented technology

The invention discloses a high-temperature-condition sound field measurement and analysis device and an analysis method thereof. The device comprises a sound guide tube array, a flexible semi-infinite tube, a sound sensor, a data collector and a computer. Through the combination design of the sound guide tubes and the semi-infinite tube, the tail end reflection of the guide tube can be restrained, and the measurement accuracy can be enhanced. The device can conduct sound field data acquisition and processing, and can realize the time domain, frequency domain and reconstruction analysis of a sound field. In the data processing process, data at the tail end of the sound guide tube can be corrected by utilizing a method of correcting the sound pressure amplitude value of the one-third octave band-based sound guide tube, and the measurement accuracy can be enhanced; the optimization of a conventional beam-formed sound field reconstruction method can be realized through kurtosis weighing computation, and accurate sound pressure distribution and strength information can be obtained. The high-temperature-condition sound field measurement and analysis device and the analysis method thereof have the advantages of being capable of conducting the sound field measurement under severe environments in which the conventional microphone can not directly conduct measurement, accurately reconstructing the distribution and strength information of the sound field at a high-temperature environment, and providing a data support for the fatigue invalidation analysis of materials/members under thermal sound coupling environments.

The invention discloses a power transmission line monitoring device metering system in a field environment. The system includes an excitation module, a vibration test module, a test interface module and a vibration control instrument; the excitation module is used for providing a vibration source for an on-line monitoring device; the vibration test module is used for detecting parameters of vibration of the on-line monitoring device excited by the vibration source; and the test interface transmits measured data to the vibration control instrument for data processing. The power transmission line monitoring device metering system in the field environment provided by the invention can enhance quality control of power transmission line breeze vibration on-line monitoring device in a lab environment, pushes reliable and effective development of state maintenance, improves a capability of technical control of state maintenance measurement equipment, enhances supervision of accuracy and reliability of the measured data of the power transmission line breeze vibration on-line monitoring device, effectively improves accident pre-judging and troubleshooting capability, and improves the safety production level and maintenance work efficiency.

A method for determining a track of a geographical trajectory which has predetermined start and locations. A data collection device, which has onboard synchronized sensors, is moved between the start and end locations, and physical measurement data such as pitch, heading, roll and distance, is obtained and stored. Thereafter, the stored data is retrieved and mapped to determine error compensation. The physical measurement data, after error compensation, is used to determine the pitch profile, heading profile, distance profile and roll profile to ascertain the geographical trajectory track.

The invention discloses a measuring and testing device and a measuring and testing method for a soil mass displacement field around a loaded structure. The measuring and testing device and the measuring and testing method solve the problem of discontinuous displacement application in the prior art, and have the beneficial effects that the measurement precision is high and the model can realize repeated use. The measuring and testing device is characterized in that: the measuring and testing device for the soil mass displacement field around the loaded structure comprises a bracket, a plane strain model tank, a loading mechanism and a recording mechanism, wherein the plane strain model tank supported by means of the bracket, at least one side surface of the plane strain model tank is transparent, the plane strain model tank is filled with a filler, structures are embedded inside the filler, the structures are connected with one end of a connecting rod; the loading mechanism is supportedby means of the bracket, the loading mechanism comprises a lifting component capable of realizing up and down lifting motion, a stress sensor is arranged between the lifting component and the other end of the connecting rod, and a displacement sensor is supported by means of the fixed bracket; and the recording mechanism is arranged on at least one side of the plane strain model tank for recording the displacement changes of the filler in the plane strain model tank.

The present invention discloses a three-component marine gravity and magnetic duplex measurement device. The device comprises a three-component marine gravity and magnetometer and a stable platform located at the bottom portion of the three-component marine gravity and magnetometer, and the bottom portion of the stable platform is provided with a power balance device; the three-component marine gravity and magnetometer comprises an analog-digital conversion circuit and a data storage circuit located at the upper portion of the internal portion of the three-component marine gravity and magnetometer, a three-component gravity sensor located at the middle portion of the internal portion of the three-component marine gravity and magnetometer, a three-component attitude sensor located below thethree-component gravity sensor and a three-component magnetic sensor located at the bottom portion of the internal portion of the three-component marine gravity and magnetometer, the top portion of the external portion of the three-component marine gravity and magnetometer is provided with a data display unit and a signal indication device, and the stable platform is provided with a temperature and salinity finder. The measurement device can perform synchronous collection of three-component marine gravity and magnetic duplex data, is high in measurement data precision and good in accuracy, and can provide more accurate data support for later scientific research.

This application discloses a cylinder deformation correction device that can detect and correct simultaneously, including a conveying track, a lifting column, a coaxiality measuring device, an ellipticity correcting device, and a PLC; a detecting and correcting station is provided on the conveying track The coaxiality measurement device includes two arc blocks and at least two displacement sensors; the ellipticity correction device includes a telescopic cross bar, a positioning plug gauge, a correction head, a correction sleeve and a right sliding column; the positioning plug gauge can be extended into the correction Inside the cylinder of the oil cylinder on the station; the correction head is fixed on the left side of the right sliding column, the correction head is cylindrical and can rotate axially; the correction head is equipped with a correction sleeve, which is also cylindrical and It can rotate freely in the radial direction; the oil cylinder barrel at the correction station can be freely inserted into the correction sleeve. The application can automatically detect the degree of deformation of the oil cylinder barrel and automatically correct and detect the oil cylinder barrel with a deviation in the degree of deformation, greatly improving the product qualification rate and reducing production costs.

The invention belongs to the field of power transmission line prevention technology, and discloses a testing platform for simulating vegetation combustion particle charges in an electric field of a power transmission line. The testing platform for simulating the vegetation combustion particle charges in the electric field of the power transmission line comprises a vegetation combustion system, a simulated power transmission line voltage generating system, a particle collecting system, a charge measuring system, a mass measuring system, a signal acquisition system and a control platform. The platform of the invention can effectively simulate the vegetation combustion condition below the power transmission line, and furthermore performs vegetation combustion in a quantitative weighing mode,thereby ensuring test repeatability. The testing platform can perform real-time measurement on the particle charges at different positions for obtaining multilayer multidimensional measurement data, thereby facilitating analysis and researching for the particle charge process and particle charge amount of mountain fire particles below the power transmission line.

The application discloses an automatic detection machine for cylinder coaxiality with controllable pressing force, which includes a detection table, a left fixed column, a right fixed column, two plug gauges, a reference plate, three displacement sensors, a PLC, two Arc-shaped pressure claws, pressure sensors and lifting displacement sensors; there is an arc-shaped reference groove on the detection table that can place the cylinder; each plug gauge can match the inner hole of the cylinder; the reference plate is set on the arc-shaped reference Directly above the groove, three displacement sensors are arranged on the bottom of the reference plate from left to right, and the top of each arc-shaped pressure jaw is fixedly connected with the reference plate through a lifting rod; the bottom of one of the arc-shaped pressure jaws is provided with a pressure sensor, wherein a lifting rod is provided with a lifting displacement sensor. In the detection process of this application, the displacement sensor is not in direct contact with the oil cylinder, the displacement sensor has a long service life, and will not scratch the surface of the oil cylinder, the detection accuracy is high, the detection rate is high, the detection is convenient, and it can automatically reading.

The invention provides a method for measuring hardness distribution of a fastener. The method comprises the following steps: streaking a sample by a blade with a streaking method; measuring three hardness points sequentially at equal intervals at the beginning end of streaking to serve as standard hardness and correspond to depths of corresponding streak parts, and obtaining the functional relation between Micro Vickers hardness and indentation depth according to data, namely, the indentation depth h obtained with the streaking method and known data including blade sharp corner eta and constant pressure F; enabling the relation to correspond to depth curve of streaks under program control of a controller to obtain the hardness distribution curve of a to-be-measured area. According to the method for measuring hardness distribution of the fastener, streaking is performed on the to-be-measured area, the hardness distribution condition of the measured area is calculated directly accordingto the functional relation between hardness and the indentation depth, and accuracy of measured data is high.

The present invention discloses a glass steel insulator measurement device. The device comprises a rack, the bottom portion of the rack is provided with a transmission device, the transmission device is connected with an insulator, and the transmission device drives the rotation of the insulator; the rack is provided with a pulling-out pull pin device and an infrared detection device, the infrared detection device is configured to detect the dimensional parameters of the insulator, and the pulling-out pull pin device is configured to perform measurement of pull pin tension of the insulator. The rack is provided with a clamping device, the clamping device is configured to fix the insulator, and protection plates with through holes are installed around the bottom of the rack. The glass steel insulator measurement device is simple in structure, convenient in manufacturing, low in manufacturing cost and precious and accurate in measurement data, and can realize automation and intelligence of the measurement process.

The invention provides a mining telescopic measuring rod manufactured by transforming a fishing pole. The measuring rod comprises a measuring tape (1), wherein the length measuring range of the measuring tape (1) is not less than 3m; the shell of the measuring tape (1) is fixed on a base (2); the cross section of the base (2) is of a U shape; the base (2) is made of a steel plate; a plug (3) is arranged at one end of the base (2), and a measuring tape guiding plate (4) is arranged at the other end of the base (2); the belt (6) of the measuring tape (1) can go in and out of the shell of the measuring tape (1) against the measuring tape guiding plate (4); the outer end of the belt (6) is fixedly connected with the extending end tip of a telescopic fishing pole (5) which is made of a non-conductive material. The invention aims to provide the mining telescopic measuring rod which is manufactured by transforming a fishing pole, is small in size and convenient to use, can be used for well guaranteeing staff safety, and is high in measuring data accuracy.

The invention discloses a point type heat flow sensor installation method for a wind tunnel aerodynamic heat test. The method comprises: establishing a numerical test model; calculating a heat flow value q0 of the typical region position point; setting point type heat flow sensor mounting points; setting a mounting height error sequence of the mounting points of the point type heat flow sensor; calculating an aerodynamic heat flow value sequence of the point type heat flow sensor mounting points; calculating a relative deviation sequence of an aerodynamic heat flow value sequence and a heat flow value q0 of a point type heat flow sensor mounting point; calculating the maximum error h0 of the mounting height of the point type heat flow sensor; and checking the height installation error of the point type heat flow sensor of the physical test model, judging whether the installation is qualified or not, and performing rectification until the installation is qualified. The method can reduce the installation error of the point type heat flow sensor, and improves the measurement data precision of a wind tunnel aerodynamic heat test.

The invention relates to an air compressor system energy conservation tester which is resistant to interference, convenient to carry and intelligent. The tester has the most important characteristic of being convenient to carry, various real-time data and state diagrams of an air compressor are displayed, and the energy conservation performance is better. Existing detection data of air compressors are relatively singular, and informatization and intelligentization of real-time operation states and various indexes of the air compressors cannot be achieved; and meanwhile, since the environments are different, the anti-interference capacity is not available. According to the technical scheme, the air compressor system energy conservation tester is a portable box and comprises a power supply, an integrated data acquisition module, a main processing unit, a touch screen and a temperature controller which are connected, the integrated data acquisition module is used for acquiring external data simulation signals which are converted into digital signals through the main processing unit, the digital signals are displayed on the touch screen, and visual information and state diagrams are provided; and the air compressor system energy conservation tester is suitable for energy conservation testing of industrial or civil air compressor systems.

The invention discloses a circuit for measuring the temperature of a to-be-detected article. The circuit comprises resistors R1 to R13, an electrolytic capacitor C1, a capacitor C2, electrolytic capacitors C3 to C5, a capacitor C6, potentiometers RP1 to RP4, a voltage-stabilized diode D1, a chip U1, a chip U2 and a thermistor Rt. The circuit can measure the temperature of the to-be-detected article at any moment, and measured data is high in precision and small in error.