4 results about "Conduction time" patented technology

The invention discloses an LED lamp constant-power constant-current time division multiplexing control method. The control method comprises a switch power supply, N paths of LED drivers, and LED lampsof N kinds of colors; the LED lamp of each color correspondingly provides a lamplight color; the LED lamp constant-power constant-current time division multiplexing control method comprises the implementation steps of determining the color types Y of the LED lamps which need to be driven to be lightened up; determining the total output current peak I<1> and the total output power P<1> of the LEDlamps of the Y kinds of colors in the step S1; improving the total output current peak I<2> of the LED lamps of the Y kinds of colors in the step S<2>, wherein at the current moment, the output current peak of the LED lamp of each color is I<2>/Y, and the output power of the LED lamp of each color is (X*P<1>)/Y; controlling the PWM duty ratio of the LED lamp of each color in the step S3 to be 1/Y;and enabling the conduction time of the LED lamp of each color in the step 4 to be staggered. By virtue of the control method, a beneficial effect that the power of the LED lamps in different color modes in mixed use can be constant and close to the total output power and the constant current is achieved.

The invention discloses an anastomat switch control assembly comprising a movable trigger pin and a fixed trigger pin. During the movement of the movable trigger pin relative to the fixed trigger pin, at least two movable conductive parts are joined or non-joined with at least two stroke spacing parts during the movement; conduction time of the at least two stroke spacing parts is controlled according to the length of joining time; deficiencies of the anastomat switch control in the prior art are overcome; spatial structure application is reduced to the largest extent; demands for various switch control are met; and meanwhile, an anastomat nail cabin assembly rotation control system, an anastomat control circuit and an electric anastomat are provided.

The invention discloses a measuring method for armorless cable direct current leakage current. The measuring method comprises the following steps: step S1, by using a measuring module, setting a sensor at two ends and the middle point of a target cable respectively, wherein each sensor is used for measuring the direct current of each point at the same moment; step S2, by using a calculation module, starting from initial conduction time, measuring once according to the step S1 at an interval of one cycle, calculating the difference value of direct current between every two adjacent sensors, andtaking absolute values; step S3, by using a ranking module, adding the absolute values obtained at the same moment to obtain moment values, after the moment values are obtained, ranking the moment values in sequence according to time series; and step S4, by using a display module, displaying the moment values arranged according to time series by printing paper tables or directly using Microsoft excels.

The invention discloses a composite heat dissipation material. The composite heat dissipation material comprises a graphite combined layer which comprises two graphite layers, wherein two adjacent graphite layers are directly adhered together through an adhesion layer; a thermal penetrability degrading layer is arranged outside the graphite combined layer; and an adhesion layer is arranged betweenthe thermal penetrability degrading layer and the graphite combined layer. According to the composite heat dissipation material, the heat dissipation of a heat source is realized, the upward thermalpenetration time can be prolonged, more long horizontal heat conduction time of the composite heat dissipation material is realized, and the surface temperature of the composite heat dissipation material is decreased.