52results about How to "Guaranteed Secure Boot" patented technology

The invention discloses a centrifugal chiller and a method for quick start-up after power failure, which is characterized in that the quick unloading device of the compressor includes a four-way valve and a quick unloading valve, specifically: a quick unloading valve is arranged outside the four-way valve to communicate with the four-way valve The high-pressure oil outlet of the valve and the high-pressure oil chamber of the piston cavity, the flow channel where the quick unloading valve is located and the internal flow channel of the four-way valve simultaneously form a high-pressure oil inlet channel; another quick unloading valve is set outside the four-way valve to communicate with the piston cavity The low-pressure oil chamber and the oil tank, the low-pressure chamber in the piston chamber are connected to the oil tank through the other quick unloading valve and the internal return channel of the four-way valve; an adjustable guide vane is arranged at the inlet of the compressor, and the adjustable guide vane is controlled by the four-way valve. The valve controls opening and closing. Quick startup can be achieved in the event of an abnormal disconnection of the main power supply and a short recovery.

The embodiment of the invention discloses a method, a device, a set-top box and a storage medium for safe starting of a system. The method includes: loading the data in the program area according to the startup instruction, and detecting whether there is abnormal data in the data in the program area; if there is abnormal data, determining the stripe information where the abnormal data is located; Determine the target check data that matches the strip information among the check data, the check data is determined in advance according to the data in the standard program area; restore the abnormal data according to the target check data, and load and restore data in the subsequent program area. The embodiment of the present invention ensures the safe startup of the system, and at the same time, broadcasts the test data in the broadcast network, occupies a small storage space, and avoids the consumption of the storage space.

The invention provides a startup control method and electronic equipment. The startup control method is applied to the electronic equipment which comprises a biological characteristic recognition module. The method comprises the following steps: under the first state of the electronic equipment, generating a first electric potential according to a specific operation, wherein all power modules of the electronic equipment are under a non-power-supply state under the first state; through the first electric potential, starting a first power submodule in the power modules to bring convenience for supplying power to the biological characteristic recognition module so as to start the biological characteristic recognition module to operate; and when the biological characteristic recognition module recognizes that the user is an authorized user, starting a second power submodule in the power modules to bring convenience for supplying power to the electronic equipment so as to start the electronic equipment.

The invention provides a low-temperature starting and running control device and method for a wind generating set. The control device comprises a control branch circuit, a heating branch circuit and a power supply branch circuit, wherein the control branch circuit, the heating branch circuit and the power supply branch circuit are connected between a first power source end and a second power source end in parallel. The control branch circuit comprises a temperature monitor, an electromagnetic control part of a first electromagnetic switch device and an electromagnetic control part of a second electromagnetic switch device. The first end of the temperature monitor is connected with the first power source end, and the second end and the third end of the temperature monitor are connected with the electromagnetic control part of the first electromagnetic switch device and the electromagnetic control part of the second electromagnetic switch device respectively. The electromagnetic control part of the first electromagnetic switch device and the electromagnetic control part of the second electromagnetic switch device are further connected with the second power source end. The heating branch circuit comprises a heater and a switch part of the first electromagnetic switch device which are connected in series. The power supply branch circuit comprises a power source and a switch part of the second electromagnetic switch device which are connected in series. According to the low-temperature starting and running control device and method in the technical scheme, safe starting and stable running of the wind generating set in the low-temperature environment are achieved, and the working efficiency of the wind generating set is effectively improved.

The invention discloses a soft switch single-phase inverter starting method. A clamping capacitor of a soft switch inverter is connected in parallel with an auxiliary starting circuit. First-time charging is carried out on the clamping capacitor through the auxiliary starting circuit. After first-time charging, the voltage of the clamping capacitor is smaller than a nominal voltage value. Then, an auxiliary staring impulse sequence for charging the clamping capacitor is applied to the inverter, the inverter is driven, the inverter is subjected to a soft switch process, second-time charging is carried out on the clamping capacitor in the inverter, the clamping capacitor is charged to have a nominal voltage value, and then an inverter control time sequence is converted into soft switch inverter PWM modulation driving signals. According to the method, soft switch operation is achieved at the starting stage of the soft switch single-phase inverter, the voltage stress of an inverter power device during a starting process is greatly lowered, and starting can be carried out safely and reliably under high direct-current bus voltage.