206results about How to "Secure boot" patented technology

Various safe switching mechanisms are provided for use with electrosurgical instruments which prevent arcing between the high-energy contacts as the high-energy source is activated. The switching mechanisms generally include a pair of high-energy contacts and a pair of activation contacts. An actuator is provided which initially engages the high-energy contacts in advance of engagement of the activation contacts to prevent arcing and subsequently disengages the activation contacts in advance of the high-energy contacts as the energy source is deactivated. A method of switching power to an electrosurgical instrument while avoiding damage to high-energy contacts is also disclosed.

A method for treating stenosis in a spine comprises percutaneously accessing the epidural space in a stenotic region of interest, compressing the thecal sac in the region of interest to form a safety zonem, inserting a tissue removal tool into tissue in the working zone, using the tool to percutaneously reduce the stenosis; and utilizing imaging to visualize the position of the tool during at least a part of the reduction step. A tissue excision system for performing percutaneous surgery, comprises a cannula comprising a tissue-penetrating member having a distal end defining an aperture on one side thereof, an occluding member slidably received on or in the cannula and closing the aperture when the occluding member is adjacent the cannula distal end, means for engaging adjacent tissue via the aperture, and cutting means for resecting a section of the engaged tissue.

A method for treating stenosis in a spine comprises percutaneously accessing the epidural space in a stenotic region of interest, compressing the thecal sac in the region of interest to form a safety zonem, inserting a tissue removal tool into tissue in the working zone, using the tool to percutaneously reduce the stenosis; and utilizing imaging to visualize the position of the tool during at least a part of the reduction step. A tissue excision system for performing percutaneous surgery, comprises a cannula comprising a tissue-penetrating member having a distal end defining an aperture on one side thereof, an occluding member slidably received on or in the cannula and closing the aperture when the occluding member is adjacent the cannula distal end, means for engaging adjacent tissue via the aperture, and cutting means for resecting a section of the engaged tissue.

A method for treating stenosis in a spine comprises percutaneously accessing the epidural space in a stenotic region of interest, compressing the thecal sac in the region of interest to form a safety zonem, inserting a tissue removal tool into tissue in the working zone, using the tool to percutaneously reduce the stenosis; and utilizing imaging to visualize the position of the tool during at least a part of the reduction step. A tissue excision system for performing percutaneous surgery, comprises a cannula comprising a tissue-penetrating member having a distal end defining an aperture on one side thereof, an occluding member slidably received on or in the cannula and closing the aperture when the occluding member is adjacent the cannula distal end, means for engaging adjacent tissue via the aperture, and cutting means for resecting a section of the engaged tissue.

An integrated circuit is operable to execute boot loader code and a boot code from external memory. To provide security so that the CPU does not execute malicious codes, the circuit resets in a restricted mode in which only certain functional units may be connected. In the restricted mode the CPU is only able to fetch boot code from an external memory for transfer to an internal memory. A hash function operates on the fetched boot code to determine whether it is authentic and, if it is determined that the code is authentic the circuit is reset to an unrestricted mode to continue executing from the boot code now stored in the internal memory. Further security is provided by a watchdog timer function which resets the circuit if the boot code is not determined to be authentic within a threshold period of time.

The invention discloses a modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for a power network black start and belongs to the technical field of power transmission and distribution. The technical scheme is that corresponding starting method and strategy are provided aiming at a two-end system and a multi-end system, wherein the method and strategy for the two-end system converter station black start comprise the steps of firstly, starting an active side converter station, closing a direct current transmission line disconnecting link, and charging a passive side converter station at the same time, secondly, carrying out charging in an alternation cycle sorting conversion mode, locking the converter station for a short time when pre-charging is finished, and finally, unlocking the converter station, placing a constant alternating-current voltage controller and fishing start-up. The method and strategy for the multi-end system converter station black start comprise the steps of respectively connecting a resistance (Rx) with positive and negative electrodes on the outlet side of each end of the multi-end system in series on the basis of the steps of the start-up of the two-end system and guaranteeing that the black start can be carried out at any ends with other ends keeping in stable operations. Therefore, reliability of power supply is guaranteed.

The invention relates to an automobile identity recognition control system based on fingerprint recognition and a control method thereof. The system is characterized in that the system comprises a plurality of fingerprint recognition sensors, a fingerprint recognition controller, a door lock control and execution mechanism, an engine control and execution mechanism, a gearbox control and execution mechanism, a seat adjusting mechanism, a steering wheel adjusting mechanism, a rearview mirror adjusting mechanism and an information entertainment control and execution mechanism; the fingerprint sensors are used for detecting user fingerprint information and transmitting the information to the fingerprint recognition controller; the fingerprint recognition controller identifies user identities according to the fingerprint information sent by the fingerprint recognition sensors and sending related instructions to the corresponding control and execution mechanisms and the corresponding adjusting mechanisms. The fingerprint recognition sensors are based on the fingerprint in vivo recognition technology, and fingerprint images of non-living bodies are invalid. The fingerprint recognition controller has a 3G/4G communication function, control and interaction can be achieved through mobile phone APPs, a mobile phone APP user has an unique identity corresponding to automobile owner information, and a person who is not an automobile owner can not operate the system.

An embodiment of the invention provides an application running device and a terminal device. The application running device comprises a scanning module, a starting operation detection module, a first safety detection module, a starting module, an event detection module and a second safety detection module; the scanning module is used for scanning a specified type of application in the current operation system; the starting operation detection module is used for detecting the starting operation of the specified type of application; the first safety detection module is used for performing the first safety detection on the running environment of the application before the application is started; the starting module is used for starting the application after a result of the first safety detection indicates that the running environment is safe; the event detection module is used for detecting a preset event in the running process of the application; the second safety detection module is used for triggering the second safety detection on the preset event in the application. According to the application running device and the terminal device, the safety of the running environment when the application is started is effectively ensured and the safety of the application in the running process is effectively ensured.

A mattress for a movable bed, laid on a floor portion of the movable bed whose bed face is deformable. A fixing element that is the floor portion is provided on a mattress surface opposite the floor portion. The movable bed may be constructed such that meshes are formed on a surface of the floor portion, and that the fixing element is fitted in gaps of the meshes to fix the mattress.

The invention provides a current ring starting method for a permanent magnet synchronous motor with variable PID parameters. The current ring starting method comprises the steps as follows: a three-phase winding of the motor is powered on to enable the N pole of a rotor to be stopped in the position of an A-axis direction of an ABC coordinate system, wherein the rotor position angle <theta> is equal to 0 at the moment; a three-phase symmetrical sine alternating voltage is pumped to the three-phase winding of the motor, the voltage frequency f is constantly increased, and the motor starts acceleration; the set rotor position angle <theta> is increased progressively; after the motor is started, a position estimator begins to estimate a rotor position <theta>', and an error value <delta> <theta> between the <theta>' and <theta> is calculated; the parameters of Kp, Ki and Kd of the current ring are adjusted through a setting module according to the estimation error <delta> <theta>, a motor stator excitation component current error value <delta>Id and a torque component current error value <delta>Iq, and after configuration is completed, the current ring is executed. By virtue of the current ring starting method, the no-position start of the permanent magnet synchronous motor can be more reliable and safer; and in addition, the control cost is low, and the control system is high in dynamic performance and high in anti-interference capability.

The invention relates to a trusted computer system based on a safe password chip and a trusted guiding method thereof. The system comprises a main platform and the safe password chip. The main platform comprises a main processor, an internal memory, an external memory, a bus and an external device. The main processor comprises a command cache unit, a data cache unit, an executing unit and a second-level cache unit. According to the trusted computer system and the trusted guiding method, when the system is started, the safe password chip runs before the main processor runs, pushes a CRTM to the command cache unit and awakes the main processor; the main processor performs execution from the CRTM, measures and loads a guide program, an operating system, an application program and the like through the safe password chip and builds a trusted chain; the safe password chip participates in the whole trusted guiding process and can not be bypassed; the CRTM is retained inside the safe password chip, other programs running on the main processor can not meet the CRTM and can also not analyze and distort the CRTM, the safer effect is achieved, and the system is more stable.

A vehicle 1000 is equipped with a fuel cell system 100 and a secondary battery as power sources. A water level of water present on a water-covered road surface is measured by a water level sensor 72. When the measured water level reaches or exceeds a preset threshold value, drive control of the vehicle 1000 stops power generation by a fuel cell stack 10, closes a discharge valve 62, and enables the vehicle 1000 to be driven with output power of a motor that is actuated with electric power from the secondary battery. This arrangement effectively prevents a damage or failure of the fuel cells mounted on the vehicle moving on the water-covered road.

The invention discloses a fuel battery low-temperature starting grading preheating control method. According to the fuel battery low-temperature starting grading preheating control method, an electric pile, a sensor for measuring the temperature of the electric pile, a fuel supply system, an oxidizing agent supply system, a cooling medium circulating medium, an electric pile power output circuit, an external heat source heating system, an internal heat source heating system and a total control system are provided, wherein the external heat source heating system utilizes a mode of directly heating the electric pile by an electric heating wire, or a mode of circularly heating the electric pile after a cooling medium is heated or a mode of heating the electric pile after the air is heated; and the internal heat source heating system utilizes heat generated by electrochemical reaction of the electric pile or heat generated by catalytic combustion in the electric pile. According to the method, the preheating mode of the electric pile is determined based on a change relation between supercooling degree and the induction time of liquid water icing influenced by a porous medium material component and a microporous structure and according to the environment temperature of fuel batter low-temperature starting, safe, rapid and efficient starting of the electric pile is guaranteed, and the durability of the electric pile is improved.

A stability controlled assistive lifting harness apparatus is provided which includes a frame, an actuator attached to said frame, a lifting harness configured to support a user and to be raised and lowered by said actuator, said lifting harness being provided with at least one surface pressure sensor located within the lifting harness which measures a force applied to a user by the lifting harness, a harness tension sensor which measures a force applied to the lifting harness by said motor, and a controller which receives outputs from said surface pressure sensor and said harness tension sensor and controls operation of said actuator based on the outputs of the surface pressure sensor and the harness tension sensor. The controller controls operation of the actuator from moving a user between said positions.

A method is provided for improving aircraft engine operating efficiency during flight in aircraft driven on the ground by electric taxi systems that extends engine warm up and cool down time during ground operations without increasing the time an aircraft spends on the ground. Aircraft are driven by electric taxi systems between landing and take off with the main engines simultaneously maintained at throttle setting for time periods that ensure even and symmetrical heating or cooling for all engine components. When the aircraft reaches a location where idle or take off thrust is required before take off, engine thrust may be increased without the adverse effects of differential thermal expansion of engine components during flight. Aircraft engines may be designed to rely on electric taxi operation and extended warm up and cool down times without delaying push back or taxi-in or otherwise negatively impacting airport operations.

The invention discloses a subway tunnel fan control system, which comprises a main circuit, a programmable logic controller (PLC) control circuit and a forced start control circuit. When a PLC control system fails, a fan can be forcibly started to run through the forced start control circuit; when the subway tunnel fan runs in a fire condition mode, the system can effectively shield the fault to ensure safe, reliable and normal operation of the fan; and the fan provides necessary fresh air for passengers and fire fighters by air supply or smoke exhaust, and a certain face velocity is formed, so that the passengers and the workers are guided to evacuate safely, harmful smoke is removed, and the fire-fighting function of exhausting the smoke by supplying fresh air is realized.

The present invention relates to a universal electric motor with variable air gap. It has a rotor (1) with on or more attraction steps and a stator (2) provided with an excitation system. The excitation system comprises, mounted consecutively distanced on a stator support (20) facing the rotor (1), at least an electromagnet (21), provided with an armature (24) and with a winding (25), a control circuit (22), provided with a position detector (26) for supply power to the electromagnet, and a permanent magnet (23). The electromagnet, and a permanent magnet (23). The electromagnet (21) and the permanent magnet (23) are fastened onto the stator support (20) to excite the rotor alternatively, and in adjustable positions the direction of rotation of the rotor itself.

A method of guiding a path of an unmanned autonomous vehicle using a system for supporting the unmanned autonomous vehicle, includes preparing parking space information; mapping positions of a plurality of intersection cameras and second laser beam projectors provided at each of a plurality of intersections and positions of a plurality of proximity sensors and second laser beam projectors provided in straight line sections, to the parking space information; allocating a driving guidance path including the straight line sections and the intersections to a vehicle to be guided to be driven and determining the proximity sensor and first laser beam projector, the intersection cameras and second laser beam projector, and per-node-direction value included in the driving guidance path; and guiding the vehicle according to a current position of the vehicle and the determined driving guidance path.

An apparatus for controlling a molten salt electrolyzer in which an electrolytic bath in a solid form as contained in the electrolyzer is melted to automatically attain a state allowing electrolysis, which apparatus comprises detecting means for detecting the changes in state of the electrolyzer by means of detectors fitted to the electrolyzer, and adjusting means for adjusting, after using the detecting means, the liquid electrolytic bath levels to a state allowing electrolysis.