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 an integrated scroll compressor and a dynamic process oscillation suppression method and device thereof. The method comprises: after an oscillation occurs in the dynamic process of the integrated scroll compressor, determining whether the oscillation is a small oscillation or a large oscillation according to a constructed linear discriminator,; when the oscillation is a small oscillation, increasing the quadrature-axis component in the output voltage of the motor to suppress the small oscillation; when the oscillation is a large oscillation, increasing the quadrature-axis component in the output voltage of the motor and modulating the output frequency of a frequency converter according to the change value of a DC bus current to suppress the large oscillation. The method can proactively suppress the oscillation generated by the dynamic process of the integrated scroll compressor, so that the motor of the integrated scroll compressor can smoothly pass through an unstable region which may be encountered in the acceleration process or the deceleration process.

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.

The invention discloses a detection method based on the sealing state of an optical fiber grating watertight door. The compensation fiber grating strain gauge is fixedly installed on the door panel of the watertight door to eliminate the influence of temperature, the wavelength difference of the fiber grating when the watertight door is closed and opened is monitored in real time, the strain difference curve of the watertight door is obtained, and the strain of the fiber grating is established through the threshold judgment method. The difference curve database can accurately judge the sealing state of the watertight door. The detection method based on optical fiber sensing technology is used to greatly improve the detection accuracy and stability, and the installation method of multiple fiber grating strain gauges at multiple points is adopted to improve the accuracy of the detection of the sealing state of the watertight door, and when the watertight door is abnormal In the sealed state, the cause of abnormal sealing can be judged, the abnormal sealing position can be accurately positioned, and the reliability of the detection method can be improved.

The invention relates to an automatic detection method for defects of infusion catheters by a machine vision system, comprising: using a clamp to fix the infusion catheters on a conveyor belt; Carry out preliminary inspection, and conduct secondary inspection after passing the preliminary inspection, and judge the infusion catheter as qualified after the second inspection; when it is judged that the infusion catheter is unqualified, judge the defect type and defect level; move the judged completed infusion catheter to the finished product area or waste product area; the present invention clamps the infusion catheter by controlling the clamp to perform secondary inspection on the infusion catheter, and can deform the infusion catheter without damaging the infusion catheter, so that the visual inspection system can perform deeper detection on the surface of the infusion pipe , so that the visual inspection system can accurately detect the hidden defects in the infusion catheter, effectively improving the detection accuracy of the method of the present invention for the infusion catheter.

The invention discloses a method and device for detecting contraband articles, comprising: collecting absorption spectrum data of articles to be inspected with a set content; Absorption spectrum data; for each kind of interference sample, for each content ratio set in advance, according to the absorption spectrum data of the interference sample of the content ratio, the absorption spectrum data of the collected item to be inspected is decomposed, and the The de-interference absorption spectrum data of the inspected item under the interference sample of the content ratio; Compare the de-interference absorption spectrum data with the absorption spectrum data of the standard product of the prohibited item with a set content, and judge whether the item to be inspected is the prohibited item according to the comparison result. By applying the present invention, it can be detected whether the item to be checked containing the interfering substance is a prohibited item.

The invention discloses a method, device and system for judging the state of a storage battery. The method comprises the steps of obtaining a current voltage value of the storage battery; obtaining charge and discharge time of the storage battery, wherein the charge and discharge time includes charge time and discharge time of the storage battery; and determining the state of the storage battery according to the current voltage value and the charge and discharge time of the storage battery, wherein the state of the storage battery comprises a normal state, an abnormal state and a fault state. The state of the storage battery can be judged on the premise of not installing a storage battery sensor or a storage battery electric eye, the damage of misuse to the storage battery is avoided while the cost is reduced, and the service life of the storage battery is ensured.

A dry burning judgment method applied to PTC heating equipment, characterized in that: one end of the PTC heating equipment is connected to a live wire, the other end of the PTC heating equipment is connected to one end of a resistor, and the other end of the resistor is connected to a zero line through a thyristor; The control electrode of the silicon-controlled silicon is connected to the corresponding control signal output terminal of the main control chip, and the connection between the PTC heating device and the resistor is used as the temperature signal detection terminal, and the temperature signal detection terminal is connected to the corresponding signal input terminal of the main control chip; the main control chip Obtain the electrical signal of the temperature signal detection terminal, compare it with the preset threshold value after processing, and judge whether the PTC heating device is in a dry state according to the comparison result; the main control chip sends a signal through the control signal output terminal to control the flow of the thyristor. Off state to control whether the PTC heating equipment is powered on. The invention can accurately judge whether the PTC heating equipment is in a dry burning state, saves special temperature control or temperature measuring devices, and is beneficial to reduce costs.