31results about How to "Advantages of detection method" patented technology

The invention provides a conduction control table automatic generation instrument based on a Hall signal and a detection method thereof. A display screen and a key control module of the instrument are connected with a main control chip module; a Hall element is connected with the main control chip module; a three-phase port module is connected with the main control chip module through a voltage sensor circuit and a filter circuit; and a power module is connected with the display screen, the main control chip module and the Hall element. The detection method comprises the following steps: 1) starting the instrument after connecting each interface of the instrument; 2) reading signals of a voltage Hall position sensor; 3) reading a voltage polarity signal output by the voltage sensor circuit through the main control chip module; 4) judging whether judgment of a three-phase conduction mode is finished; 5) outputting Hall truth table statements; 6) judging whether six different Hall states are detected; and 7) ending the measurement process, the instrument jumping to an end state and keeping screen output. A conduction control Hall truth table is generated based on the input signal of the Hall element and line voltage input signal.

The invention provides a method for detecting the metal distribution rate in rocks, comprising: preparing light slices, thin slices or probe slices from rock samples, and then coating; using a mineralogy automatic analysis instrument to measure the mass percentage of minerals in rocks; using laser The denudation inductively coupled plasma mass spectrometer measures the mass content of the metal element M in the mineral, and the unit is ppm; calculate the grade of the metal element M in the rock according to formula 1, and the formula 1 is: the grade of the metal element M in the rock=(∑γ i ×β i ×10 ‑4 )×100%, i=1,2,…,n, where i represents the i-th mineral in the rock, γ i Represents the mass percentage of the i-th mineral in the rock, β i Represents the mass content (ppm) of the metal element M in the i-th mineral; calculate the metal distribution rate of the metal element M in the rock according to formula 2, and the formula 2 is: the metal distribution rate of the metal element M in the i-th mineral=( gamma i ×β i ×10 ‑4 ÷ grade of rubidium in rock) × 100%. The invention provides a new method for elemental geochemistry, petrology and mineralogy research.

The invention discloses a BIM-model-based distribution network and underground cable fault detection method comprising steps of building an original BIM model, carrying out normal state data modelingand carrying out online data detection. At the step of building an original BIM model, structural characteristics of distribution network and underground cable distribution are obtained comprehensively; at the step of carrying out normal state data modeling, several kinds of variable process data in a normal stable operation state of a distribution network and underground cable are inputted into the BIM model based on a neighborhood preserving embedding algorithm and a statistic amount and a corresponding statistic threshold are calculated; and at the step of carrying out online data detection, process variable data collected in real time during the operation process of the distribution network and underground cable are projected to the model constructed by normal state data modeling, a statistic amount is calculated; and the statistic amount is compared with the statistic threshold calculated by the normal state data modeling to obtain a detection result. Therefore, BIM-model-based multi-variable distribution network and underground cable fault detection is realized; and the operation and maintenance management safety of the distribution network and underground cable is improved.

The BTM closed-loop library inspection system of the present invention comprises a vehicle-mounted recorder platform, a trackside processing center, a receiving unit, a locomotive identification unit, an adjustable transmitting unit, a BTM detection server and a data terminal; All the operation information of the on-board BTM equipment; the trackside processing center realizes the communication with the BTM detection server, and sends the measured data to the BTM detection server, and the BTM detection server will analyze and judge the data; the adjustable transmitting unit and the track The trackside processing center is connected, and the trackside processing center transmits the modulated FSK signal or message through the adjustable transmitting unit. The technical effect of the invention: it can realize the test of the uplink and downlink of the BTM equipment, carry out long-term analysis and statistics on the state of the BTM equipment, and give early warning information. This test is automatically completed when the locomotive is in and out of the warehouse, and will not affect the operation of the locomotive.

The invention discloses a bearing inner ring aperture detection device and a detection method thereof, belonging to the technical field of bearing inner ring detection. First, the inner ring of the bearing to be tested is moved into the conveyor belt through the feeding mechanism, and then the inner ring of the bearing is moved into the station to be inspected on the station table through the shifting plate, and the inner diameter of the inner ring of the bearing to be tested is obtained through the detection and calculation of the detection mechanism and the control unit Size, roundness and taper. Finally, the shifter moves the detected inner ring of the bearing to the corresponding pusher block according to the instructions of the control unit, and then the pusher block moves the inner ring of the bearing into the corresponding pusher block under the action of the cylinder. The trough realizes the automatic detection, classification and arrangement of the inner ring of the bearing.