4results about How to "Avoid major security incidents" patented technology

The invention discloses a goaf coal spontaneous combustion early warning system which comprises a plurality of temperature sensors and a plurality of gas detectors arranged in a goaf, and the gas detectors are used for detecting gas components in the goaf; the data acquisition module is connected with the temperature sensor and is used for acquiring temperature data; meanwhile, the data acquisition module is connected with the gas detector and is used for acquiring gas component data; the data acquisition module comprises a signal conditioning circuit and is used for amplifying and filtering an electric signal output by the temperature sensor; the data acquisition module further comprises an A / D converter used for converting an analog signal into a digital signal; the processing module is connected with the data acquisition module and is used for processing the temperature data and generating an early warning signal; the processing module is also used for processing the gas component data and generating an early warning signal in combination with the temperature data; and the early warning module is connected with the processing module and is used for receiving the early warning signal and sending out early warning information. The method has the effect of timely and accurately carrying out early warning on coal spontaneous combustion in the goaf.

The utility model discloses a foundation pit displacement monitoring device which comprises a ground body, a foundation pit groove is formed in the ground body, a monitoring installation block is arranged on the foundation pit groove, the ground body is connected with the monitoring installation block through an installation fixing assembly, and side edge blocks are fixedly installed on the four sides of the monitoring installation block. According to the foundation pit displacement monitoring device, the four foundation pit side face connecting plates are arranged on the four side faces of the foundation pit groove, when abnormal displacement happens to the side edges of the foundation pit groove, the foundation pit side face connecting plates can be driven to move, and therefore displacement changes are found; when the side wall of the foundation pit groove abnormally displaces, the displacement driving rod is driven to move, at the moment, a movable pointer on the position distance display assembly moves, an engineer observes the position change of the movable pointer on a displacement scale, whether the displacement change of the foundation pit groove occurs or not can be obtained, and collapse safety accidents are avoided in time.

The utility model relates to a gas quick connector technical field, concretely is a pipeline gas leakproof quick connector, include: the joint main part, the joint main part inside forms the fluid passage that communicates with each other, the upper joint of one end of the fluid passage of joint main part is connected, the upper joint is equipped with the outer thread, is used for through bolt connection external device, the lower joint of the other end of the fluid passage of joint main part is connected, the lower joint is equipped with the internal thread, the lateral communication mouth of the fluid passage of joint main part is connected the side joint, the observation window is the window that is made of transparent material, is embedded in the outer wall surface of joint main part, and with the fluid passage in the joint main part intercommunication.

This invention relates to a method for locating overvoltage / undervoltage faults in battery systems, belonging to the field of new energy vehicle technology. The method includes: real-time acquisition of battery system SOC, maximum cell voltage, minimum cell voltage, and total current; when an overvoltage alarm occurs in the battery system, fault location is performed: based on characteristic indicators and their corresponding set thresholds, it is determined whether the fault is due to individual cell damage, unreasonable control strategy, slow current limiting by the charging pile, secondary charging, sampling line problems, current feedback, circulating current, or active balancing; the process for determining each set threshold is as follows: based on a failure case library, a fault tree containing all causes of overvoltage faults is established to obtain training set data; the training set data is input into a decision tree classifier to obtain the characteristic indicators of each overvoltage fault cause and the corresponding set thresholds. This invention provides timely fault location in the event of an alarm, improving battery safety.