39results about How to "Control shutdown" patented technology

The embodiment of the invention discloses a method and device for controlling a terminal to close down. The method comprises the steps that after the terminal is started up, working condition information of the terminal is obtained; if it is confirmed that the terminal is started up abnormally according to the obtained working condition information of the terminal, the terminal is controlled to close down. In the method and device, after the terminal is started up, the terminal is not kept in a started-up state on all conditions; instead, whether the terminal is started up abnormally or not needs to be detected at first. Thus, in the terminal packaging and transporting processes, when the terminal is started up due to the fact that a power switch is trigged accidently, it can be detected that the terminal is started up abnormally and the terminal can be controlled to close down. Therefore, the situation that the electric quantity of a battery in the terminal is consumed due to abnormal start-up cannot occur, so that it can be guaranteed that the electric quantity of the battery in the terminal meets the requirement for first-time start-up, and the success rate of first-time start-up of the terminal is improved.

The invention relates to a drive system (1). The drive system (1) has at least two inverters (3, 31, 32, 33) and at least two motors (2). Each of the motors (2) each of which comprising a stator and a rotor has at least one first coil system (21) and a second coil system (22) in the stator. Each first coil system (21) is connected to a first inverter (31) in an electrically conductive manner, and each second coil system (22) is connected to a second inverter (32) in an electrically conductive manner. The invention further relates to a method for the redundant operation of a drive system (1), wherein at least one motor exchanges electric energy with the second inverter (32) and / or one or more additional inverters (33) if the first inverter (31) fails.

The invention discloses a photoelectric sensor transmitting terminal driving circuit, and aims to overcome the defect that an existing photoelectric sensor transmitting terminal driving circuit cannot make the driving current of an LED to be constant current, and cannot adjust the current magnitude through a compiled program. The photoelectric sensor transmitting terminal driving circuit comprises an LED driving chip TLC 5941 and a signal driving chip 74 HCT 245 which is connected with the LED driving chip TLC 5941 through signals; the signal driving chip 74 HCT 245 is used for driving the signals and guaranteeing the quality of the signals; the LED driving chip TLC 5941 is used for driving a transmitting terminal of a photoelectric sensor, can drive 16 sensor transmitting terminals simultaneously with the driving current being constant current, can allocate an internal memory register of the driving chip so as to achieve current adjustment, and can control the switch-on and switch-off of a current source. The photoelectric sensor transmitting terminal driving circuit can be applied to the transmitting terminal driving circuits of various photoelectric sensors.

The invention relates to a multi-axis non-proportional fatigue test system based on centrifugal loading. The multi-axis non-proportional fatigue test system comprises a load sensor, a centrifugal multi-axis non-proportional loading part and a fatigue sample, wherein the centrifugal multi-axis non-proportional loading part comprises a rotating loading cross bar, a loading support and a clamp component; the rotating loading cross bar is arranged on the loading support through a bearing; a left eccentric mechanism and a right eccentric mechanism are respectively fixed at the two ends of the rotating loading cross bar; the loading support is located between the left eccentric mechanism and the right eccentric mechanism; the clamp component comprises an upper clamp and a lower clamp; the loading support is fixed to the upper clamp and is used for driving the upper clamp to apply a multi-axis non-proportional fatigue load to the fatigue sample when the rotating loading cross bar is rotated.The device is used for applying the multi-axis non-proportional fatigue load in the manner of centrifugal force, can overcome the defect of difficulty in applying the combined loads, such as, non-proportional tensile pulling-bending and bending-torsion of the present multi-axis non-proportional fatigue test system and supplies an effective test method for researching the material fatigue performance under a complex loading condition.

An LED backlight driving circuit and a driving method therefor, and a liquid crystal display apparatus. The LED backlight driving circuit (10) comprises an LED light bar (30) and a power module (20) driving the LED light bar (30). An output end of the LED light bar (30) is separately coupled to a short-circuit protection module (40) and a divider resistor (R0). The short-circuit protection module (40) comprises a comparison unit (41) and a driving unit (42) coupled to the comparison unit (41). Voltages at two ends of the divider resistor (R0) are used as feedback voltages (V1, V2) coupled to the comparison unit (41). The comparison unit (41) is also coupled to a preset first reference voltage (VF1). When a value, by which the feedback voltages (V1, V2) exceed the first reference voltage (VF1), is greater than a preset deviation value, the driving unit (42) controls the power module (20) to be switched off. When the first reference voltage (VF1) is greater than or equal to a maximum brightness of the LED light bar in a normal state, the voltages at the two ends of the divider resistor (R0) are divided. The LED backlight driving circuit (10) can provide a short-circuit protection function when an LED lamp bead is in a short circuit.

The present invention provides a PFC circuit and a control method thereof, wherein the PFC circuit includes: a Boost inductor, an auxiliary winding, an auxiliary switch tube, a main switch tube, a clamp capacitor, a series resistor and a control module; the Boost inductor and the The auxiliary winding mutual inductance, the first end of the auxiliary winding is connected to the first end of the auxiliary switch tube, the second end of the auxiliary switch tube is connected to the first end of the clamp capacitor, and the clamp capacitor The second end is connected to the first end of the series resistor, and the second end of the series resistor is connected to the second end of the auxiliary winding; the main switch tube is connected between the Boost inductor and ground; the control The modules are respectively connected to the control terminal of the main switch tube and the control terminal of the auxiliary switch tube.