Abstract: An early warning method for safety production risk of tailings pond based on risk ranking is provided. The early warning method includes: monitoring and collecting internal basic data of a tailings pond in real-time, and performing a basic monitoring and a basic early warning; collecting geographical location data, meteorological data, and historical geological disaster data of an area where the tailings pond is located; performing risk ranking on a safety production risk of the tailings pond, thereby obtaining a risk level of the tailings pond; and collecting case data of global tailings pond accidents and hazard degree data thereof, acquiring accident solution strategies for the global tailings pond accidents, performing management and monitoring on the tailings pond, setting parameters in a process of the basic monitoring, and performing a ranked early warning on the safety production risk of the tailings pond based on the risk level.

Abstract: An early warning method for safety production risk of tailings pond based on risk ranking is provided. The early warning method includes: monitoring and collecting internal basic data of a tailings pond in real-time, and performing a basic monitoring and a basic early warning; collecting geographical location data, meteorological data, and historical geological disaster data of an area where the tailings pond is located; performing risk ranking on a safety production risk of the tailings pond, thereby obtaining a risk level of the tailings pond; and collecting case data of global tailings pond accidents and hazard degree data thereof, acquiring accident solution strategies for the global tailings pond accidents, performing management and monitoring on the tailings pond, setting parameters in a process of the basic monitoring, and performing a ranked early warning on the safety production risk of the tailings pond based on the risk level.

Abstract: A dual line photodiode array device encapsulates, on a photoelectric sensing element, two columns of photodiode array units having the same specification and performance; the dual line photodiode array device includes a first photodiode array unit and a second photodiode array unit that are arranged parallel to each other and is used for achieving the measurement of particle velocity. The particle velocity may be more accurately measured by means of integrating the two columns of photodiode array units on a single photosensitive element. The dual line photodiode array device may also be applied to the measurement of raindrops and sea spray droplets.

Abstract: A dual line photodiode array device encapsulates, on a photoelectric sensing element, two columns of photodiode array units having the same specification and performance; the dual line photodiode array device includes a first photodiode array unit and a second photodiode array unit that are arranged parallel to each other and is used for achieving the measurement of particle velocity. The particle velocity may be more accurately measured by means of integrating the two columns of photodiode array units on a single photosensitive element. The dual line photodiode array device may also be applied to the measurement of raindrops and sea spray droplets.