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

An abnormality detection apparatus for working tools configured to be used in a machining process performed by a machine tool, the abnormality detection apparatus includes a storage portion which previously stores correlations between features of a plurality of operating portions relation to the machining process performed by the machine tool, and a tool condition of each of a plurality of working tool types, and a tool condition determining portion which determines the tool condition of the working tools based on the correlations.

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.

The invention relates to a sound field measuring and analyzing device and an analyzing method in a high temperature environment. The device consists of an acoustic catheter array, a flexible semi-infinite tube, an acoustic sensor, a data collector and a computer. The combined design of the acoustic tube and the semi-infinite tube can suppress the reflection at the end of the tube and improve the measurement accuracy. The device can collect and process sound field data, and realize sound field time domain, frequency domain and reconstruction analysis. In the process of data processing, the data at the end of the sound tube is corrected by using the sound pressure amplitude correction method based on the 1 / 3 octave spectrum to improve the measurement accuracy; the conventional beamforming sound field weighting is realized through the kurtosis weighted calculation. The structural method is optimized to obtain accurate sound pressure distribution and intensity information. The advantage is that it can perform sound field measurement in harsh environments that conventional microphones cannot directly measure, and can accurately reconstruct sound field distribution and intensity information in high temperature environments, providing data support for fatigue failure analysis of materials / components in thermoacoustic coupling environments.

The invention discloses a method for installing a point heat flow sensor used in wind tunnel aerodynamic heat tests. This method establishes a numerical test model; calculates the heat flow value q0 of a typical area location point; sets the point type heat flow sensor installation point; sets the installation height error sequence of the point type heat flow sensor installation point; calculates the aerodynamic heat flow value sequence of the point type heat flow sensor installation point ; Calculate the relative deviation sequence between the aerodynamic heat flow value sequence of the point heat flow sensor installation point and the heat flow value q0; calculate the maximum error h0 of the installation height of the point heat flow sensor; check the height installation error of the point heat flow sensor of the physical test model, and determine the installation Whether it is qualified, and make rectification until the installation is qualified. This method can reduce the installation error of the point heat flow sensor and improve the measurement data accuracy of the wind tunnel aerothermal test.

The invention provides an elevator no-load balance coefficient detection device based on a hydraulic cylinder direct jacking manner. The elevator no-load balance coefficient detection device comprises an upper clamp, a lower clamp, a force measuring sensor, a hydraulic cylinder, lifting rods and a pulling plate. The upper clamp is used for clamping the upper portion of a selected traction rope section; the lower clamp is used for clamping the lower portion of the selected traction rope section; a cylinder body part of the hydraulic cylinder is installed on the upper clamp; the lower end of the force measuring sensor is connected with a plunger of the hydraulic cylinder and used for measuring the pressure value of the hydraulic cylinder; the pulling plate is located above the hydraulic cylinder and is connected with the upper end of the force measuring sensor; the lower ends of the lifting rods are connected with the lower clamp, the upper ends of the lifting rods are connected with the pulling plate, and the lifting rods are used for lifting the lower clamp. A load measuring device is improved to be in the hydraulic cylinder direct jacking manner, so that in the using process, the problem of interfering in measuring results of an oil pipe can be solved due to the hydraulic cylinder direct jacking manner; and the requirement for the length of the clamped steel wire rope section can be lowered, the integral cost is reduced, the integral size is reduced, and the integral weight is reduced.

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.