44results about How to "With power-off protection function" patented technology

The invention discloses a high-reliability linear file access method based on a nand flash. The nand flash comprises an sdram memory, an nvram nonvolatile memory and a nand flash memory array. The access method comprises the following steps: initializing a partition table; initializing file information which comprises beginning and end addresses of a file, an open mode, a filename and file size information; creating a new file according to initialized file information; adopting an address order mode to transfer data from a buffer area in the sdram memory of the nand flash to a memory area pointed by a file pointer in the partition area, and completing file write; and reading the data from the partition area to the sdram memory of the nand flash, then taking the data from the sdram memory, and finishing file read. The high-reliability linear file access method based on the nand flash realizes file access management of equipment based on the nand flash, and has the characteristics of high efficiency and capability of realizing data access in a file mode.

The invention relates to a lunar exploration mechanical arm modular joint with the torque retention feature. The lunar exploration mechanical arm modular joint can solve the problems of high launchingcost of the modular joint of the mechanical arm of a lunar exploration vehicle and short service life of the mechanical arm of the lunar exploration vehicle. A driving device is connected with a flange disc at an input end of a harmonic reducer through a rotor shaft of a motor, a rigid gear is fixedly connected with an inner seat of an angular contact bearing, the inner seat of the angular contact bearing is fixedly connected with a casing of an input device, a flexible gear is fixedly connected with the flange disc at an output end of the harmonic reducer and an output flange disc, back-to-back angular contact bearings are arranged between the inner seat of the angular contact bearing and an outer seat of the angular contact bearing, a contact type packing sealing structure and a mechanical limiting structure are arranged between the flange disc of a sealing device and the outer seat of the angular contact bearing, and an electrical device is fixed between the inner seat of the angular contact bearing and the output flange disc. The lunar exploration mechanical arm modular joint has the advantages of power-off protection function, compact structure, light weight, low power consumption, good sealing performance, low launching cost and long service life.

The invention relates to a wireless network video monitoring system with high mobility, which comprises a video monitoring terminal, a wireless network transfer module and a video surveillance system. The video monitoring terminal collects video signals through a camera, then the video signals are sent to a main processing module after being transformed by A/D; voice frequency signals are sent to the main processing module after being processed by a voice frequency processing module, and the video signals and the voice frequency signals processed by the main processing module are stored in a real-time memory card and are sent to the wireless network transfer module, the software of which is controlled by SD. The SD controls the wireless network to automatically be linked to a video server to update the video monitoring video when mobile carriers reach a base station. The invention has the advantages of high reliability, guaranteeing uninterrupted video monitoring, high transmitting speed, low cost of equipment, high price performance, flexibility and practicality; the invention absolutely solves video monitoring blind spots and pitfalls of mobile objects and fills up the video monitoring blank of the mobile objects.

The invention provides anautomatic compensation system for an electrode tip of a welding manipulator in the field of resistance spot welding for welding a vehicle body. The automatic compensation system comprises the welding manipulator and a welding platform, wherein a compensation plane and a detection switch are also arranged on the welding platform; the detection switch is connected with an automatic lifting control system of the welding manipulator; the heights of the welding manipulator and the top electrode tip arranged on the welding manipulator are automatically controlled through a signal of the detection switch; and the automatic lifting control system of the welding manipulator comprises a current detection and analysis module, an alarm device and an automatic compensation system. The system is safe and reliable in operation, can guarantee that the welding quality of a welding spot of a product meets the technical requirements, can give an alarm for wear of the electrode tip, can realize automatic wear compensation and enters a normal welding program after automatic compensation is finished.

The invention discloses a method for implementing a file system in an embedded system, which comprises the following steps of: establishing the file system consisting of a file information area and a file data area, wherein the file information area consists of a plurality of file information structures for describing each piece of file information respectively, and the file data area is used for storing files; initializing the file system; and establishing and maintaining the file information area by using a journal method, and when writing operation is performed on the files each time, after the files are written into the file data area, updating the records of the file information to the file information area. In the method, the file system is implemented, can modify the number of the files to be stored and total capacity according to configurations, has a power failure protection function, high file reading/writing operation efficiency and small code sizes, is less dependent on an operating system and convenient to port, and occupies fewer resources.

The invention provides a suspended zero-gravity simulated test bed comprising an active tracking subsystem, a plurality of passive tracking subsystems and a plurality of suspension systems, wherein the active tracking subsystem comprises a first guide rail and a plurality of active moving platforms moving along the first guide rail; the plurality of passive tracking subsystems are respectively fixedly arranged on the plurality of active moving platforms; each passive tracking subsystem comprises a second guide rail and a passive moving platform; and the plurality of suspension systems are respectively fixedly arranged on the plurality of passive moving platforms. The suspended zero-gravity simulated test bed has the beneficial effect that the zero-gravity simulated test bed provided by the invention adopts an active and passive mixed tracking mode, has a power-off protection function and can be used for a zero-gravity simulated test of a complex movement mechanism needing multi-point suspension. The invention also provides a using method of the suspended zero-gravity simulated test bed.

The invention discloses a water source automatic switching device, which is characterized by the following: arranging main water source interface, auxiliary water source interface and water outlet interface on lateral face of container; communicating the interfaces to tee pipe separately; concatenating the main water source interface and the tee pipe to clack valve component and air-vent valve; concatenating the auxiliary water source interface and tee pipe to one-way valve; concatenating the water outlet interface and the tee pipe to flow sensor; connecting auxiliary water source detector to water level entry side of controller on inner wiring board. This invention possesses simple structure and lower cost.

A safety belt controlled by a magneto-rheological load limiter comprises a lock buckle, a lock tongue, a woven belt, a locking device, a connecting plate, a sliding block, the magneto-rheological load limiter, an electric controller, an electronic control unit, a woven belt force sensor, an electronic control switch and a fixed sleeve. The magneto-rheological load limiter mainly comprises a cylinder body, an electromagnet piston, a piston rod, a sealing partition plate and magneto-rheological fluid. The magneto-rheological load limiter adopts the magneto-rheological control mode, can intelligently control the tensioning degree of the woven belt in the locking device according to the vehicle speed, the acceleration speed of the woven belt, the inclination angle of a vehicle body and the constraining force on the human body, can constrain the human body to a seat as soon as possible in emergency circumstances, can intelligently control the woven belt for providing appropriate constraint force for controlling the deceleration of the human body according to the physiological limit of the human body and can protect the human body against constraint injury caused by the woven belt.

The invention discloses a multi-point control switch, which comprises the following parts: binding post J1 and J2, main switch Kz and multi-auxiliary switch Kf, load resistance R1, R2 and R7, bias resistance R3, R4 and R6, charge-discharge current-limiting resistance R5, voltage-limiting current-limiting resistance R8, charging capacitance C2, filter capacitance C1, by-pass capacitance C3, C4 and C5, triode T1, T2 and T3, single-direction controllable silicon T4, commutating bridge Q, diode D1 and D2. The main switch parallels the auxiliary switch with random switch controlling the path and discontinuity of main circuit.

The invention discloses a socket with a power-off protection function; the socket comprises an image acquisition module, a wireless transmission module, a control module and a protection module arranged on the socket body; the image acquisition module is connected with the control module via the wireless transmission module; the control module is wirelessly connected with the protection module; the image acquisition module is used for obtaining image information of a specific object moving in front of the socket, and sending the image information to the control module via the wireless transmission module; the control module compares the image information with pre-stored object information, calculates the similarity between the image information and the object information, and sends the similarity to the protection module; the protection module carries out power off protection for the socket according to the similarity. The image information of the specific object in front of the socketcan be obtained; the similarity between the image information and the pre-stored object information can be calculated; the power off protection for the socket can be carried out according to the similarity, thus ensuring power usage safety.

The invention discloses an impedance self-adaptive laser diode driver, and belongs to the technical field of electronic equipment. The impedance self-adaptive laser diode driver mainly comprises a current setting module (1), an amplitude limiting setting module (2), a power output module (3), a load judgment module (4), a delay compensation module (5), a voltage tracking module (6), a power-off protection module (8), a front panel (14) and the like. When the driver works, the driver can actively adapt to the load change, and has the advantages of high efficiency, wide load application range, high safety, high reliability and the like.

The invention relates to an impedance adaptive laser diode driving circuit and belongs to the technical field of electronic equipment. The impedance adaptive laser diode driving circuit comprises a current setting module (1), a amplitude-limiting setting module (2), a power output module (3), a load determining module (4), a delay compensation module (5), a voltage following module (6) and a power-off protection module (8). The impedance adaptive laser diode driving circuit can actively adapt to the change of a load in operation, and has high efficiency, a wide load adaptation range, high safety and high reliability.

The invention discloses a portable impedance self-adaption laser diode driving module, and belongs to the technical field of electronic equipment. The main structure of the portable impedance self-adaption laser diode driving module comprises a front panel (1), an amplitude limiting setting module (2), a power output module (3), a load judgment module (4), a time delay compensation module (5), a voltage tracking module (6), an outage protection module (8) and the like. During working, the module can actively adapt to load changes and has the advantages of being high in efficiency, wide in loadadaptation range, high in safety, high in reliability and the like.

The invention relates to a digital impedance adaptive laser diode driver and belongs to the technical field of electronic equipment. The driver mainly comprises a single chip microcomputer (1), a digital to analog conversion module (2), a power output module (3), a load judging module (4), a delay compensation module (5), a voltage tracking module (6), and a power-off protection module (8). The driver can actively adapt to the change of the load during work, and has the advantages of high efficiency, wide load adaptation range, high safety and high reliability.