4results about How to "Solve the false alarm problem" patented technology

This invention discloses a stable combustion control system based on a multi-dimensional furnace combustion measurement method, specifically relating to the field of furnace combustion measurement. This includes multi-dimensional sensor data acquisition, feature parameter quantification and extraction, combustion stability modeling, intelligent graded stable combustion control, iterative optimization of control effect, and dynamic evaluation of combustion state. Multi-dimensional sensor data acquisition involves synchronously acquiring data through an array of sensors. Feature parameter quantification and extraction involves preprocessing the acquired data to extract key feature parameters. Combustion stability modeling involves constructing a quantitative evaluation model of the combustion stability index based on the key feature parameters. Intelligent graded stable combustion control involves triggering a three-stage direct injection response mechanism for the fuel gun based on the combustion stability index, combined with an adaptive energy matching algorithm to dynamically adjust the stable combustion energy injection. This invention, through a multi-dimensional sensor array and feature extraction algorithm, achieves advanced identification of early combustion deterioration, solving the problem of lag in single flame detector monitoring.

The invention discloses a target detection method for suppressing fuzzy false alarms by a helicopter anti-collision radar. When the anti-collision radar detects a stationary target on the ground, the invention fully considers the characteristic that the target Doppler position can be obtained under the condition that the helicopter speed is known when the target is stationary, and increases the frequency offset between different pulses so that the difference in frequency between the fuzzy target echo and the unambiguous target echo is used to distinguish the unambiguous target, thereby solving the false alarm problem caused by the fuzzy echo.

The invention discloses a regulating valve, comprising: a valve body comprising a valve plate for controlling the on-off of an internal gas channel, the valve plate comprising a permanent magnet, a valve plate block and a baffle plate structure connected from top to bottom; the sealing cover is mounted above the valve body and hermetically covers the outer side of the permanent magnet of the valve plate; the rotary air cylinder drives and switches the opening and closing states of the valve plate; the clamping jaw is arranged on the outer side of the sealing cover and does not make contact with the sealing cover, and the center position of the upper portion of the clamping jaw is connected to a shaft of the rotating air cylinder; a permanent magnet is arranged on each of the two sides of the clamping jaw; the rotating air cylinder drives the clamping jaw to rotate when rotating, and the valve plate rotates around the center axis of the valve plate in a non-contact mode along with the clamping jaw under the action of magnetic attraction.

The utility model relates to an electric needle open and short circuit protection circuit, which comprises an optocoupler U1 and an optocoupler U2, two pins of the input end of the optocoupler U1 are respectively connected with an OUT1 end and an OUT2 end, the OUT1 end and the OUT2 end are used for connecting two ends of a load, the optocoupler U1 is connected with a diode D2 in parallel, one pin of the output end of the optocoupler U1 is connected with the in-phase input end of a comparator U3A, two pins of the input end of the optocoupler U2 are connected with the OUT1 end and the OUT2 end, and the other pin of the optocoupler U2 is connected with the other pin of the comparator U3A. One pin of the output end of the optocoupler U2 is connected with the in-phase input end of the comparator U3B; the input end of the optocoupler U2 is connected with a diode D1 in parallel, a plug-in JP1 is arranged between the OUT1 end and the diode D1, and a loop is formed when the load is short-circuited. According to the utility model, an alarm can be given when the load connection is abnormal, abnormal connection caused by load short circuit or open circuit can be distinguished, and the problem of false alarm when the human body impedance change is large in the existing detection circuit is avoided.