7 results about "Delayed Alarm" patented technology

The invention relates to the technical field of fire-fighting alarm, and particularly discloses a sleep cabin fire-fighting alarm system based on smoke sensing-manual alarming double triggering. According to the invention, a smoke sensing and manual alarm double-trigger architecture is constructed, a timing window is started after a control module receives a primary alarm signal, and if a manual trigger signal is received within a preset time, the smoke detection sensitivity is adjusted from a first preset threshold value to a lower second preset threshold value for re-checking and confirmation; the problems that single smoke detection easily causes false alarm due to smoke dust interference and lacks manual confirmation links to cause missing alarm or delayed alarm of smoldering initial fire are solved, and the fire detection accuracy and the emergency response reliability of the sleep cabin are improved.

The invention discloses a lamp anti-theft positioning method and system based on a reader-writer-tag dual-channel handshake timeout mechanism and a storage medium, and solves the problems of metal shell shielding, high power consumption, no local deterrence, alarm delay and the like. The reader-writer periodically transmits a radio frequency command frame; the dual-mode electronic tag in the lamp and the 2.4 GHz active frame are subjected to conformal loopback response through a UHF passive reflection link; and if no response is received within 500 ms-2 s, handshake is judged to be overtime, and the rear end immediately reports'suspected theft 'and triggers the lamp body to give a stroboscopic alarm by using a 1-3 Hz white LED, so that'alarming once being taken away' is realized. The system is composed of a lamp end dual-mode tag and LED stroboscopic drive, a reader-writer end radio frequency transceiving and timeout timer and a rear end alarm upgrading and pushing module. A single reader-writer covers a 30-80 m area to complete area-level positioning. The plastic shell is provided with no hole, and IP67 protection is kept. The storage medium stores a program for implementing the method. The system is low in power consumption, easy to implement and suitable for mobile lighting anti-theft management of miner lamps, construction head lamps, storage forklift lamps and the like.

The utility model discloses a gas film access control alarm device which comprises a gas film bin body, an opening is formed in the gas film bin body, a rolling shaft is rotationally installed at the top of the opening, a door body is fixedly installed on the rolling shaft, an alarm box is fixedly installed on the gas film bin body, an alarm is arranged in the alarm box, and a gas film is arranged in the alarm box. A fixing plate is fixedly mounted in the alarm box, a mounting plate is arranged on the fixing plate, a fixing ring is fixedly mounted on the mounting plate, a driving spring is fixedly mounted in the fixing ring, a release mechanism is arranged in the alarm box, a linkage mechanism is arranged in the alarm box, and a trigger mechanism is arranged on the mounting plate. According to the utility model, additional installation steps are not needed, the whole operation process is simplified, the device can be quickly built and installed under the emergency condition, the emergency response efficiency is greatly improved, the delayed alarm function is realized through the rotation of the door body rolling shaft, a user can be reminded to close the door body in time, and adverse effects on the use of the gas film bin body are avoided.

The application relates to the field of time measurement, and discloses an intelligent watch for safety monitoring and alarming, which comprises a data acquisition and preprocessing module, a risk feature extraction module, an environment evaluation module, a dynamic risk fusion module, a predictive buffer alarm control module and an alarm execution module which are connected in sequence. The system collects physiological and environmental data of a user through multiple sensors, calculates risk factors in four dimensions of heart rate variability, motion contradiction, skin electric response and abnormal stillness, dynamically adjusts the fusion weight of each factor in combination with the real-time evaluated environmental risk level, and generates a comprehensive risk score. The alarm control module executes a hierarchical buffer alarm process including early warning, local delayed alarm and remote alarm according to the score and its short-term prediction value in combination with a dynamic threshold. Through multi-dimensional information fusion and environment adaptive decision, the application can more accurately distinguish physiological interference from real risks, reduces false alarms, and ensures timely response to real risks.

The invention discloses a redundant link protection potential error detection optimization method and a redundant link protection potential error detection optimization device, according to the method, by optimizing a LatentErrorTest and an algorithm function of a LatentErrorReset in an 802.1 CB protocol, an abnormal alarm can still be completed immediately under the condition that the time arrangement of the LatentErrorTest and the LatentErrorReset is not good, and the abnormal alarm can be completed without two LatentErrorTest periods. When 802.1 CB redundancy protection equipment is used, through algorithm optimization of the invention, when link abnormity is generated under some special conditions, a user can be prompted to complete link abnormity detection by interrupting an alarm to a CPU immediately, so that delayed alarm caused by previous algorithm defects is avoided.

This invention discloses a safety control method and system for hydrogen refueling stations. The method includes: acquiring weather information and hydrogen concentration at the refueling station in real time; determining a hydrogen concentration alarm threshold based on the weather information; comparing the hydrogen concentration alarm threshold with the hydrogen concentration at the refueling station to determine in real time whether there is a hydrogen leak at the refueling station; and issuing an alarm when a hydrogen leak is detected. This method can determine whether there is a leak based on a hydrogen concentration alarm threshold that matches actual weather conditions, thereby avoiding false alarms due to excessively low alarm thresholds and delayed alarms due to excessively high alarm thresholds.