31results about How to "Judgment accurate judgment" patented technology

The invention discloses a prohibited article detection method and a prohibited article detection device. The prohibited article detection method comprises the steps of acquiring a set content of absorption spectrum data of an article to be detected; for each interference sample, determining absorption spectrum data of each interference sample with a preset content ratio; for each interference sample, performing spectrum unfolding on the acquired absorption spectrum data of the article to be detected according to each preset content ratio and the absorption spectrum data of the interference sample with the content ratio to obtain de-interference absorption spectrum data under the interference sample with the content ratio; for each prohibited article, comparing the de-interference absorption spectrum data of the article to be detected under the interference sample with the absorption spectrum data of the standard prohibited article with the set content according to each preset content ratio, and judging whether the article to be detected is the prohibited article according to a comparison result. By the application of the prohibited article detection method and the prohibited article detection device, whether the article to be detected comprising an interference substance is the prohibited article can be judged.

The invention relates to the technical field of three-head saws, in particular to a three-head saw for processing aluminum alloy door frames, including slide rails, No. No. 1 cylinder, No. 1 inclined knife and No. 1 protective shell are installed on the No. 2 workbench; No. 2 air cylinder, No. 2 inclined knife, flat knife and No. 2 protective shell are installed on the No. 2 workbench; the aluminum alloy door frame is processed The three-head saw also includes a feeding module and a controller; the feeding module is arranged close to the feeding plate, and the feeding module includes a supporting plate, a rolling rod and a roller; the supporting plate is at least two, and the supporting plate is located on the feeding plate above; the present invention drives the outer frame to slide along the feeding plate through the feeding module, and then cooperates with the No. 1 inclined knife, the No. Manual feeding causes safety hazards to workers, and the present invention also has the characteristics of economy, practicality, convenient operation, high precision and high efficiency.

The invention discloses a teed line fault branch selection method. The method of the invention comprises the following steps of firstly measuring fault phase positive sequence voltages and fault phase positive sequence currents of protection installation positions of three branches of the teed line; calculating a fault current of an injection fault point of the three branches; calculating fault phase positive sequence voltages of T connection nodes of the three branches respectively; subtracting an average value of a sum of the fault phase positive sequence voltages of the T connection nodes of the other two branches from the fault phase positive sequence voltage of the T connection node of the third branch so as to obtain a voltage difference value; then calculating whether an angle of voltage difference value exceeding fault current is less than zero; if the angle is less than zero, determining that the third branch is the fault branch of the teed line. The method of the invention is suitable for fault branch selection of a whole fault process after the teed line has the fault. A selection result is not influenced by a transition resistor, a fault type, a load current and a fault position and the fault branch of the teed line can be accurately determined.

The invention discloses a method for detecting faulty track circuit shunting based on railway train positioning. The method uses the positioning data of the on-board satellite positioning device of the railway locomotive, the standard surveying and mapping line data and the train train length data to combine to judge the overall actual alignment of the train. The first occupancy condition of the track section, and the first occupancy condition is compared with the second occupancy condition of the section given by the railway interlocking system. When the first occupancy condition and the second occupancy condition are not instantaneously inconsistent, it is determined that a shunt occurs. Bad phenomenon, through the accurate judgment of the bad shunt phenomenon, so as to avoid the safety accident and the idle section caused by the inaccurate information of section occupancy and clearing due to the bad shunt.