54results about How to "Correctness of judgment" patented technology

The invention discloses an observation and test apparatus for cavity evolution in test pieces under tensile impact and a test method. The observation and test apparatus comprises first micro strain gauges and second strain gauges symmetrically arranged at two surfaces of a lath test piece, wherein the lath test piece comprises a non-cavity cluster region and a cavity cluster region and is fixedly mounted on a Hopkinson rod device, the non-cavity cluster region is near an input rod, the cavity cluster region is near an output rod, a plurality of the first micro strain gauges are arranged at the non-cavity cluster region, a plurality of the second micro strain gauges are arranged between cavities, one first micro strain gauge is connected with a high-speed camera through a super dynamic strain gauge, and the remaining first micro strain gauge and all the second strain gauges are connected with a oscilloscope through the super dynamic strain gauge. According to the invention, researchers can conveniently master an evolution rule of the cavities in the test pieces under controllable and measurable tensile impact load. The apparatus and the method can also be applied for impact tensile strength and failure test of industrial and engineering lath-structural members containing pores.

The invention relates to a guide wave radar level meter-based liquid dielectric constant assessing method. The guide wave radar level meter-based liquid dielectric constant assessing method comprisessampling the echo signals of a guide wave radar level meter according to a set sampling frequency to obtain original echo signals; searching for a plurality of effective peak messages and effective trough messages; performing feature extraction on a plurality of effective peak echo signals to obtain a maximum peak feature value to convert the distance from the top end of a guide wave rod to a liquid level; performing feature extraction on a plurality of effective trough echo signals to obtain a maximum trough feature value, performing sequencing to determine whether effective bottom echo exists, selecting the minimum coordinate position of a wave trough as the bottom information of the guide wave rod, and computing the transmission distance of the guide wave rod inside liquid as well as the dielectric constant of the liquid to be measured. The guide wave radar level meter-based liquid dielectric constant assessing method achieves assessment of the dielectric constant of the liquid to be detected according to the relationship between the bottom echo signals and the practical length of the wave guide rod, and can help correct dielectric constant parameters and further ensure high-precision material-level measurement.

The invention discloses a DL / T860-based method for realizing the modeling of power supply equipment for substations, including the following steps: importing the provided default ICD file, judging whether the port configuration of the power supply equipment for substations has changed; backing up the IED performance description file and mapping file; start to generate IED performance description file according to DL / T860 standard; judge whether generating IED performance description file fails; use default IED performance description file; generate corresponding mapping file according to IED performance description file; verify IED performance description file and mapping Whether the file is correct; the power supply equipment used in the substation starts normally. The invention has the advantages of automatic generation of IED performance description (ICD) files, low technical requirements for staff, small workload and accuracy.

The invention discloses a DC project final circuit breaker protection function verification system and a verification method. The system comprises a control terminal, a transceiver terminal, a bus terminal and an upper management device. There are more external circuit breakers in the existing control panel cabinets, and the state of circuit breakers may change, which leads to a lot of software input parameters of circuit breakers. Before this, it is difficult to verify the correctness of the software program function in the control panel cabinet by manual way. Through this system, the traversal test under various conditions can be realized, and the correctness of the control panel cabinet software can be verified from the realization.

The invention discloses a controllable characteristic load used for cable cabling accuracy detection. The controllable characteristic load comprises a power supply part, a main control circuit, a line reverse connection detection circuit and a characteristic load access circuit. The power supply part powers the main control circuit, the line reverse connection detection circuit and the characteristic load access circuit. The line reverse connection detection circuit and the characteristic load access circuit are connected with a cable to be detected. The main control circuit is electrically connected with the line reverse connection detection circuit and a characteristic load access circuit. According to the invention, based on problems existing in the prior art, whether a line is in reverse connection is judged according to voltage characteristics between a neutral line and a ground line; in particular, the characteristic load access circuit generates reactive power on the cable to be detected, and the circuit accuracy is judged through power changes; the invention further provides a reliable judgment mechanism to cooperate with the controllable characteristic load to realize a simple and reliable detection scheme which is operated by a single person; and the line correctness is effectively investigated.