9 results about "Reaction speed" patented technology

The invention discloses an emergency parachuting device and method for a multiple-rotor unmanned aerial vehicle. The device comprises a measurement and control unit, an unlocking steering engine, a parachute-throwing spring, a latch, a parachute and a magnetic latching relay, wherein the measurement and control unit, the unlocking steering engine, the parachute-throwing spring, the latch, the parachute and the magnetic latching relay are installed in a parachute bin. The measurement and control unit comprises a microcontroller and an inertia movement measurement unit, wherein the microcontroller is electrically connected with the unlocking steering engine and the magnetic latching relay; the unlocking steering engine is connected with the latch through a rocker arm, and the magnetic latching relay is used for connecting or disconnecting a power supply of a rotor motor; the parachute bin is fixed to the multiple-rotor unmanned aerial vehicle, one end of the parachute-throwing spring is fixed to the bottom of the parachute bin, and the parachute is arranged at the other end of the parachute-throwing spring. The method includes the following steps that the current instant height and acceleration of the unmanned aerial vehicle are acquired, the dropping rate of the unmanned aerial vehicle is worked out, whether the unmanned aerial vehicle flies under a dangerous dropping state or not is judged, and if yes, the power supply of the rotor motor is disconnected, and the parachute is thrown out to make the unmanned aerial vehicle safely land. The emergency parachuting device has the advantages of being simple in structure, low in cost, light in weight, high in reaction speed and the like.

The invention provides a photo-catalytic oxidation water treatment device based on a solar fixed film. The device consists of a clear water storage box (1), a to-be-treated water storage box (2), a pretreater (3), a pump (4), a flowmeter (5) and a photo-catalytic reactor (6), wherein a photo-catalytic reactor main body is a box with a top cover through which ultraviolet light can penetrate; the inside of the photo-catalytic reactor is divided into multiple galleries (7) which are connected mutually; 2-5 layers of fixed film catalysts (8) are filled on the side wall and bottom flat of each gallery (7); the catalyst (8) is supported by a special stainless steel net skeleton (22) or long column type skeleton (23); and the catalyst film utilizes a partial euphotic glass fiber net as a carrier on which a permanent TiO2 film is supported. The device has the advantages of simple structure, large treatment amount, high reaction speed and low operation cost, is convenient for manipulation and stable to operate, and can be widely applied to deep treatment of drinking water and preparation of high-pure water or treatment of toxic, harmful, high-concentration and low-degradable inorganic waste water.

The invention relates to a line voltage compensation circuit based on peak detection current mode switch circuit. The line voltage compensation circuit provided by the invention comprises a sample circuit and a compensation circuit, wherein, the sample circuit is used for sampling voltages related with the line voltage, thus obtaining sampling voltages which are in linear relation with the line voltage and scaling down in proportion. The compensation circuit is connected with the sample circuit and is used for compensating the non-inverting input end or inverted input end of a comparator in the peak detection circuit by utilizing the sampling voltage of the output by the sample circuit in an electrical signal mode, so that the inductance peak point current is equal to the inductance peak point current under the ideal situation. The line voltage compensation circuit provided by the invention not only has the advantages of steady loop and quick reaction speed and the like in the traditional peak detection current mode switch control circuit, but also can be used for overcoming the problem of unstable inductance peak point current caused by system delay, so that the inductance peak point current is invariant. The line voltage compensation circuit provided by the invention can be widely applied to analogue integrated circuits.

The method of recovering and regenerating waste gas desulfurizing and defluorinating absorbent liquid continuously includes absorbing SO2 and / or fluoride from waste gas with alkaline absorbent to generate desulfurizing and defluorinating absorbent liquid containing sodium sulfite, sodium bisulfite and / or fluoride; the subsequent reacting the desulfurizing and defluorinating absorbent liquid with magnesium-base suspension or solid to obtain magnesium sulfite and / or magnesium fluoride precipitate; filtering to eliminate magnesium sulfite and / or magnesium fluoride precipitate, and recovering the filtrate at pH 6.5-9.5 for reuse. The said method has fast regeneration reaction speed, low cost and complete reaction.