30results about How to "Shorten the warning time" patented technology

A rapid early-warning system based on a phase-sensitive optical time-domain reflectometer includes a disturbance monitoring and positioning module, and a disturbance signal identifying module. The disturbance monitoring and positioning module: a disturbance monitoring part performs difference on the beat signal intensity of a phase-sensitive optical time-domain reflectometer, the rapid early-warning system based on the phase-sensitive optical time-domain reflectometer can monitor the difference of the beat signal intensity all the time, and once the difference of the beat signal intensity changes, it means that a disturbance signal generated by disturbance occurs; and a positioning module can determine position information of a disturbance point through the time difference of an optical time-domain reflectometer echo. The disturbance signal identifying module includes a pre-treatment module, a feature extraction module, a template training module, a pattern classification module, and a post-treatment module; template training means that templates of a plurality of types of signals can be constructed according to features of a series of different types of disturbance signals; the features of the disturbance signals and preset templates of the plurality of types of signals are matched, and the types of the signals can be determined according the matching degrees; and a warning measure or a no-warning measure can be preformed according to a result of pattern classification.

A road surface division mark recognition apparatus includes: a vehicle-mounted camera that takes an image of a road surface ahead of a vehicle; an image processing portion which has a plurality of image processing modes that correspond respectively to a plurality of kinds of road surface division marks, and which recognizes a road surface division mark in a selected image processing mode; a temperature measurement portion that measures the temperature of the vehicle-mounted camera; and a restriction portion that restricts the action of the vehicle-mounted camera if the temperature measured by the temperature measurement portion is higher than or equal to a threshold value. The threshold value differs between the image processing modes.

The invention relates to a power transmission line forest fire monitoring method and system based on remote sensing data cloud detection, and belongs to the technical field of power transmission lineforest fire monitoring. The method comprises the steps of remote sensing data acquisition, cloud layer detection, potential fire point identification, absolute fire point threshold detection, fire point detection based on a background information method, solar flare elimination and the like. According to the method, the forest fire information can be quickly and accurately obtained from the obtained remote sensing image, false detection and missing detection are reduced, the forest fire near the power transmission line is monitored, the comprehensiveness of forest fire monitoring of the powertransmission line can be effectively improved, coping measures can be conveniently taken in time, and greater loss is avoided.

The invention, which relates to the technical field of symptom monitoring, provides a symptom monitoring system and method. The method comprises: an information management module establishes basic user information according to a management operation; a user supervision module generates symptom information through a selection operation, manages symptom information according to basic user information, and generates symptom monitoring information; and a symptom early-warning module sets an early-warning rule, evaluates the symptom monitoring information according to the early-warning rule, and generates early-warning information. According to the invention, a monitoring starting point is moved forward to a symptom occurrence time, so that the early-warning time of the epidemic situation is shortened and the accuracy of the epidemic prevention and control is improved; and the operation difficulty is simplified by using the selection operation and the application range of the applicable population is extended.

The invention discloses the technical field of respiratory disease monitoring and discloses a wearable respiratory disease monitoring system and method based on Internet of Things. The system comprises a respiratory signal collection module, a blood pressure collection module, a cardioelectric collection module, a wireless communication module, a signal processing module, a main control module, adisease analysis module, a prewarning module, a cloud service module and a display module. Respiratory rate and respiratory intensity are calculated by adopting a 'time-frequency domain' approximationmethod through the signal processing module, so that the system has high resistance to movement interference; online real-time calculating of the respiratory rate and the respiratory intensity can berealized; the respiratory rate and the respiratory intensity can be acquired at the same time; respiratory disease prewarning information is converted in format and then sent to a user terminal through the prewarning module to enable the user terminal to display the respiratory disease prewarning information; a could server is adopted to shorten disease prewarning time and expanding disease prevention and control range.

The invention discloses a parachute opening state monitoring method based on drag parachute feature recognition and a system thereof, and the method comprises the steps: judging whether a guide parachute is emitted or not, judging whether the drag parachute is successfully opened or not if the guide parachute is emitted normally, and taking the intersection point of a drag parachute reinforcing band as a feature point; and using the change gradient of the total number of the feature points is used as a threshold value for judging whether the drag parachute is successfully opened or not. The parachute opening state of the drag parachute is judged by measuring the change gradient condition of the total number of the feature points on the drag parachute, the corresponding threshold value is set, and when the change gradient of the total number of the feature points is lower than the certain threshold value, the voice radio station is automatically triggered to carry out voice prompt, so that rapid judgment and emergency treatment of a pilot on the parachute opening state of the aircraft are realized. According to the method, whether parachute opening succeeds or not can be rapidly judged on the basis of pickup of the parachute opening feature points of the airplane, the alarm time is shortened, the response time of a pilot is shortened, the test flight safety margin is improved, and the method has good practicability.

The invention discloses a voice guide system based on image recognition. The system comprises a wireless communication system and a monitoring alarm system. The wireless communication system comprisesa wireless receiving module and a wireless transmitting module; the wireless receiving module comprises an earphone and a wireless receiver, the wireless transmitting module comprises a microphone and a wireless transmitter, the monitoring alarm system comprises a monitoring module and an alarm module, the monitoring module comprises a wireless camera, and the alarm module comprises an audible and visual alarm and a microprocessor. The invention discloses a voice guide system based on image recognition. The audible and visual alarm and the microprocessor are arranged, so the facial expressions of the tourists can be monitored, whether the tourists are in danger or not is judged by analyzing the facial expressions; when the tourists are in danger, early warning can be sent out at the firsttime to remind a tour guide principal to rush to an accident site for rescue, the early warning time is greatly shortened, and therefore real-time monitoring on the safety of the tourists is achieved.

The invention discloses an online monitoring device for a high steep slope in a highway, and relates to the technical field of highway high steep slopes. The online monitoring device comprises a supporting column, a protection frame and a fixed column; the supporting column is fixed in an immovable rock-soil body on two sides of a slope monitoring point; a monitoring assembly is fixedly installedat the top of the supporting column and comprises a box body; an inner cavity is formed in the box body; two fixed bases are fixedly installed on the inner wall of the inner cavity; and an insulatingcylinder is fixedly installed between the two fixed bases. The online monitoring device can achieve online monitoring of the high steep slope in the highway, save manpower and achieve real-time monitoring; when the high steep slope in the highway slides down, fallen soil can be blocked by the protection frame, the situation that the fallen soil impacts the road surface and the fixed column can beavoided, an early warning device and a flashing lamp jointly remind passing vehicle drivers, dual reminding is achieved, the situation that a driver can notice the abnormity of the high steep slope isguaranteed, the early warning time is saved, and the early warning effect is improved.

The invention relates to a jet propulsion superspeed torpedo. A torpedo body (1) is composed of a head (2), a front cabin (3), a middle cabin (8), a rear cabin (11) and a tail jet pipe (14). A heavy rocket engine and a fuel tank on the most advanced 'snowstorm' torpedo at present are omitted, main compressed air is used for replacing fuel gas generated by the rocket engine, and the torpedo body (1) is propelled in a jet mode; the supercavitation technology is continuously adopted, and the auxiliary compressed air is used for generating artificial cavitation; the middle cabin (8) is also used as a container for storing auxiliary compressed air, and the rear cabin (11) is also used as a container for storing main compressed air; the mass of the torpedo body (1) is greatly reduced, the noise is greatly reduced, the cost-effectiveness ratio is greatly improved, the speed is further improved, the penetration capability is higher, and the power is larger.