4results about How to "Avoid startup failures" patented technology

The application discloses a room-temperature piston type Stirling pulse tube refrigerator and relates to the field of low-temperature refrigeration, comprising a compressor, a separate pipe, a connecting pipe and a pulse tube cold finger; the compressor comprises a center connecting structure, two groups of compressor heat exchangers oppositely distributed on the two sides of the center connecting structure, a linear compression mechanism, a driving motor and an elastic supporting mechanism; the compressor is connected with the pulse tube cold finger through the separate pipe and the connecting pipe respectively. The application has the advantages that the room-temperature piston work recovery technology is adopted to recover the pulse tube heat end expansion work, the overall machine efficiency is improved, the phase of the mass flow and the pressure of the working medium can be adjusted, the optimal matching of the compressor and the pulse tube cold finger is realized, the high-efficiency operation of the overall machine is realized, and the overall machine refrigeration efficiency is improved.

This invention discloses a power-type composite thermistor for suppressing surge current, comprising an NTC thermistor chip and a PTC thermistor chip encapsulated in a resin layer with their two electrodes in contact. A common pin is fixed to the contact electrode of the NTC and PTC thermistor chips, and NTC and PTC thermistor pins are fixed to the non-contact electrode of the NTC and PTC thermistor chips, respectively. The contact NTC and PTC thermistor chips are connected in parallel in a circuit for suppressing surge current. This invention uses a soldered encapsulation method, facilitating mass production, and offers advantages such as low-temperature start-up, surge suppression, and adaptability to frequent power-on / off cycles. Its novel structure has promising application prospects.

The invention relates to the technical field of medical equipment control, in particular to a power supply circuit of a cold-state light source and electronic equipment. The input end of an output management module is connected with a power supply module, and the output end of the output management module is connected with an output interface for accessing an external load; the input end of the voltage reference module is connected with the power supply module. The first output end of the voltage reference module is connected with the reference input end of the current-limiting protection module. The sampling input end of the current-limiting protection module is connected with the output end of the output management module, and the output end of the current-limiting protection module is connected with the feedback end of the output management module; the second output end of the voltage reference module is connected with the reference input end of the boost control module; the sampling input end of the boost control module is connected with the output end of the output management module, and the output end of the boost control module is connected with the feedback end of the output management module. Intelligent management of the cold-state light source is realized, and the starting success rate, the operation stability and the safety of the light source system of the medical equipment are improved.

This invention relates to an automatic software update method based on an in-vehicle embedded operating system, belonging to the field of computer software technology. It solves the problem that existing methods cannot simultaneously achieve reliable system startup and flexible, secure automatic software updates. The method includes: partitioning the physical disk into a system root partition, a user data partition, and an OverlayFS working partition; automatically entering safe mode by detecting kernel boot parameters, mounting the system root partition as read-only, and mounting specified directories as read-write overlays based on the OverlayFS file system and whitelist configuration files; dynamically switching the safe mode on and off via system services and command lines; upon detecting an external update device, entering maintenance mode, performing security verification on the update package from the external update device, and then performing an atomic update operation on the user data partition. This achieves both reliable operating system startup and flexible automatic software updates.