35results about How to "Avoid underreporting" patented technology

The invention provides an electromagnetic radiation monitoring early warning method of mine roof water inrush, belonging to a coal mine water disaster monitoring and early warning method. At a selected test point, the effective receiving direction of an electromagnetic radiation receiving antenna is arranged to face a roof area to be monitored, electromagnetic radiation signals are collected for seven days, and the electromagnetic radiation intensity and pulse number change range and change rate are calculated as a standard threshold value. The electromagnetic radiation signals are continuously monitored, according to the electromagnetic radiation intensity value of a monitoring area roof and the size and charge rate of a pulse number, a determination condition of roof water inrush is made, whether the roof has water inrush risk is judged, and thus whether the water inrush disaster is carried out is determined. The method has the advantages of simple operation, low testing cost, high efficiency and convenience.

The invention provides a monitoring and early warning system and method for construction warning areas based on image recognition. The system includes an image input module, an image splicing module, an interactive calibration module, a pedestrian detection module, a visual intrusion module, a feature extraction Intrusion detection, target detection and re-identification technology, by setting cameras around the construction warning area or around dangerous construction equipment to collect and obtain the surrounding environment information and the information of people entering and leaving in real time, the operator can change the alarm trigger area and the registration information of the operator at any time, and update it in real time Whether there is a human intrusion signal in the early warning trigger area, when there is a human intrusion signal, it will be activated and an alarm will be issued to remind violators to prohibit entering the area to ensure the safety of the construction warning area.

The invention discloses a self-calibration method of an infrared thermal imaging body temperature monitor, which can realize automatic calibration. At the same time, before the calibration, pedestrians are initially judged by the temperature information of the detection area obtained by the infrared thermal imaging body temperature monitor. If it is determined that there are no pedestrians in the monitoring area, perform automatic calibration; otherwise, determine that there may be pedestrians in the monitoring area, and further judge whether there are pedestrians in the monitoring area through the infrared image S, if not, perform automatic calibration, otherwise, repeat the execution for pedestrians Judgment until it is determined that there are no pedestrians in the monitoring area to complete the automatic calibration of the temperature. The self-calibration method of the infrared thermal imaging body temperature monitor can avoid the phenomenon of information omission caused by the jam during the calibration period, and can realize the continuous detection of the pedestrian body temperature within the field of view by the infrared thermal imaging body temperature monitor, ensuring the accuracy of the detection accuracy and stability.

The invention relates to an earthquake forecasting and monitoring device, which comprises a monitoring device body buried underground and a monitoring device positioned on the ground; an earthquake forecasting monitor is arranged in the monitoring device body; the earthquake forecasting monitor consists of a multicontact double engaged switch for monitoring transverse and longitudinal waves and alarm equipment consisting of a resistor and a digital direct-current ammeter, and the bottom in a rectangular body of the earthquake forecasting monitor is provided with a magnet; a large ball is placed on the magnet, and small balls are suspended on two sides above the magnet respectively; the upper part in the rectangular body is provided with a high-speed illumination camera; the lower end outside the rectangular body is provided with the multicontact double engaged switch of a longitudinal wave electronic predictor perpendicular to the earth center; and a pre-shock ball is placed on the lower part of the multicontact double engaged switch. The earthquake forecasting and monitoring device can monitor crustal change in multiple directions, can monitor the change of earthquake transverse waves in the horizontal direction of 360 degrees, and forecast the direction from which the earthquake transverse waves comes, has sensitive action and high accuracy, and can forecast the central position of the earthquake focus.

The invention discloses a coil structure for a through-type detector and a detector formed from the coil structure. The coil structure for the through-type detector is characterized by comprising a first emission coil, a second emission coil, a third emission coil and a receiving coil, wherein the first emission coil, the second emission coil and the third emission coil are separately connected with the receiving coil in an electromagnetic coupling mode, the first emission coil and the second emission coil are arranged in parallel, and the third emission coil is perpendicular to each of the first emission coil and the second emission coil. With the coil structure for the through-type detector, disclosed by the invention, the detection capability of the through-type detector is improved, and the defect that a test blind region exists at a top position of the through-type detector in the prior art is overcome.