32results about How to "Guaranteed failure" patented technology

The invention relates to the communication field. The embodiment of the invention discloses a protection method of a WDM optical network ring, which is based on resources and considers protecting time control. The method mainly comprises the processing procedures under three states of preconfigured state, normal working state and fault state. The proposal also provides a heuristic ring search configuration method and a protection switch process matched with the configuration method.

The invention discloses a nitrogen-protected brazing method of an aluminum water tank sandglass pipe. According to the nitrogen-protected brazing method, an Al-Si brazing filler metal composite layer which is 3%-6% of the thickness of a material covers the inner part of the sandglass pipe; after a water tank core is assembled, sandglass positions are tightly contacted together under the effect of a clamping force of a brazing clamp; in a brazing process, a brazing flux is not added to braze after the inner part of the sandglass pipe is subjected to degreasing cleaning so that the sandglass pipes are firmly brazed together to form a reinforcing rib. The brazing process disclosed by the invention adopts a nitrogen-protected continuous furnace to braze and the production efficiency is high; the brazing flux does not need to be added into the pipe, thus the manufacturability is very good and the yield is high; the nitrogen-protected brazing method is particularly suitable for industrial batch production. According to the nitrogen-protected brazing method disclosed by the invention, a welding line is full after the brazing and the strength is high; in a static pressure bursting test, a water chamber is invalid after being pressed and sealed and the invalid pressure of a sandglass pipe water tank can be up to more than 0.5MPa. According to the nitrogen-protected brazing method, the brazing flux is not added into the water tank so that the inner cleanliness of a product can be improved and the adverse effects of the brazing flux on an anti-freezing solution can be prevented.

The invention provides a fool-proof connector with a USB interface, which is used for signal transmission and power transmission of small electronic products, which includes: a male connector, including a core connector, one end of the core connector A USB socket for connecting USB is provided; a female socket connector includes a female socket body and a female socket electronic circuit board, and metal shrapnels are arranged in the female socket body, and the metal shrapnels are connected with the core connectors respectively. It is connected with the female electronic circuit board, and a fool-proof component, the fool-proof component includes a male-end component and a female-end component, the male-end component is arranged on the male connector, and the female-end member is arranged On the female base connector, it is complementary in shape to the male end member.

The invention discloses a three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and a building method thereof. The power distribution network comprises a first primary power supply segment, a second primary power supply segment, a third primary power supply segment and a triangular power supply structure, wherein the first primary power supply segment is built by a first end power supply, the second primary power supply segment is built by a second end power supply, the third primary power supply segment is built by a third end power supply, the triangular power supply structure comprises a first secondary power supply segment, a second secondary power supply segment and a third secondary power supply segment which are connected in a head-to-tail way and are in a triangular shape, and a wiring structure is arranged on each of the first secondary power supply segment, the second secondary power supply segment and the third secondary power supply segment and comprises a segment switch in a normally closed state and a connection switch in a normally open state. The power distribution network adopts a two-circuit, two-segment and two-tie structure, the structure is relatively independent, is relatively high in load transfer capability, is simple and reasonable and is particularly applicable to rural areas and new city regions, and the actual requirements of transportation inspection, dispatching and marketing management are met.

Provided are a motor controller of a hierarchical multi-core structure and a control method thereof. The motor controller comprises a power inverter unit for driving a motor to run, an application interface function module, a motor control function module, and a drive function protection module. The application interface function module sends controller status information to an external control system, receives a control signal from the external control system, and sends a control command to the motor control function module. The motor control function module receives the control command sent by the application interface function module, detects a motor status, performs motor control computation, and sends a control pulse to the drive function protection module. The drive function protection module receives the control pulse, processes the control pulse, and then sends the processed control pulse to the power inverter unit. The drive function protection module detects an operating status of the inverter, and controls the power inverter unit. The motor controller is divided into three layers of independent systems from inside to outside and from bottom to top, being a drive layer system, a control layer system, and an application layer system. Circuit modules are closely linked, and functionally independent. The controller has advantages of high reliability and high safety.