66results about How to "Ensure redundancy" patented technology

The invention discloses a fire linking control system applied to urban rail transit and a method. The fire linking control system comprises a main control system, a fire automatic alarm system, an electromechanical device monitoring system, a communication system, an intelligent low-voltage system, a ventilating air conditioning system and the like; the fire automatic alarm system is used for realizing fire detection and alarming, judging whether a fire accident arises and the detailed location of the fire accident; the fire automatic alarm system selects a corresponding fire mode instruction according to environmental control requirements provided by the ventilating air conditioning system and different fire accident locations; the electromechanical device monitoring system receives and analyzes the fire mode instruction and drives fire fighting apparatuses to operate according to a predefined mode so as to execute a corresponding fire fighting mode. The fire linking control system can greatly increase the coordination linkage capability of fire fighting, save the response time of fire fighting, imorove fire fighting efficiency and enhance the reliability and stability of a fire fighting system.

The invention discloses combined laser tracking and inertial surveying system for measuring position and gesture of space object composed of inertial surveying subsystem, laser tracking measurement subsystem, and computer control and data collection and process subsystem connected to the above said two systems. The invention is also discloses a dynamic tracking measuring method. Based on requirement of Kalman filtering algorithm, the method builds system equation and observation equation for moving target between fixed connected coordinate system and global coordinate, and edits expanded Kalman filtering algorithm for optimal modifying each error information. So as to calculate out information of position and gesture of target in fixed connected coordinate system related to global coordinate. The invention raises stability and measuring precision, and enriches output information measured.

The network relay device of the invention makes a pair with at least a specific network device to relay data in a network. The network relay device includes: a control module that sends and receives a control frame signal to and from the specific network device, selects either of a master mode and a backup mode based on at least the control frame signal sent from the specific network device, and changes a working state according to a result of the selection; and a communication module that is under control of the control module to open a port and enable data transmission via a line linked to the port in the case of setting a master state to the working state, and to block off the port and disconnect the line linked to the port in the case of setting a backup state or another non-master state to the working state. The control module changes the working state from the backup state to a first intermediate state in response to selection of the master mode, determines whether the specific network device is in the backup state, based on the control frame signal sent from the specific network device, and changes the working state from the first intermediate state to the master state after confirmation that the specific network is in the backup state.

A device (14) for attaching or hooking an engine to an aircraft strut (10) comprises a circular arc-shaped fitting (16), formed from two elementary, coupled portions, which are also circular arc-shaped. These two elementary portions can be separate parts joined by bolts (24). The fitting (16) is fixed to the strut (10) by tension screws (30) and is solely connected to the engine by two connections or links (18). Each of these connections comprises a damping or shock absorber block (36) fixed to a base (40) connected to the engine and connected to one end of the fitting by a spindle (42). A holding part (44), fixed between the shock absorber block (36) and the base (40), is connected to the fitting by a joint (50) with clearance.

A train control system establishing radio communication between a plurality of on-train radio control apparatuses moving on a predetermined path and a plurality of ground train radio control units disposed along a predetermined path, so as to establish parallel simultaneous radio communications on a plurality of radio communication channels of various communication frequencies between the plurality of on-train radio communication apparatuses and the plurality of ground train radio control units, wherein one radio communication channel is selected out of the plurality of radio communication channels to perform an authentication request and an authentication process, wherein an encryption key obtained by the authentication process is used as a common encryption key shared by the plurality of on-train radio control units to encrypt data communication between the plurality of on-train radio control units and the plurality of ground train radio control units.

The invention discloses a data acquisition network framework and a planning method. The framework comprises a core layer, a gathering layer, an access layer and a metering control layer. Network devices required by each layer and functions thereof are clearly known. The invention provides a large local area network topology structure where the 1000M backbone ring network is combined with 100M star-type network, and long-distance data transmission is achieved through GPRS wireless acquisition and VPN virtual channels. Through the IP/MAC address binding of a switch, the VLAN virtual network division and CSS cluster switch management technology, safety and compatibility of a data acquisition network are improved. According to the invention, reference and guidance are provided for planning and implementation of the whole solution of an energy management system.

The invention discloses a liver ultrasonic image identification method based on sparse expression. The method comprises the following steps of: (1) selecting an interested area from a liver ultrasonic image training sample with a space-occupying lesion area; (2) extracting a gray scale symbiosis matrix texture ratio characteristic, a fractal characteristic and a abrupt change rate characteristic of the interested area; (3) utilizing a dictionary expansion method based on sparse reconstruction to construct an expanded dictionary by the image characteristics obtained in the step (2); (4) utilizing the expanded dictionary obtained in the step (3) to construct a classifier based on sparse expression; and (5) inputting the image characteristics of a testing sample into the classifier for identification and judgment, and identifying out the liver ultrasonic image with the space-occupying lesion area. According to the invention, the classified identification accuracy is high, and each index accords with a clinical diagnosis range.

The invention provides a device parameter online identification method based on multi-section hybrid measurement information. The method includes the steps of firstly, filtering multi-section device measurement data; secondly, acquiring a device model; thirdly, judge whether the device model is a power transmission circuit or a transformer winding, performing the fourth step if the device model is the power transmission circuit, and otherwise, performing the fifth step; fourthly, identifying and estimating power transmission circuit parameters; and fifthly, identifying and estimating transformer parameters. SCADA (supervisory control and data acquisition) measurement information of a scheduling technology support system and phase measurement information of a WAMS (wide area measurement system) are fully utilized to build a hybrid measurement system, suspicious device parameters is estimated through multi-time sections, and identification accuracy of device parameters is improved.

Problem: To provide a vehicle monitoring system capable of checking a wide range of area at the rear of a vehicle to afford a high level of safety, without increasing an amount of protrusion from the side surface of the vehicle body.

Solution: A vehicle monitoring system 1 is provided with a first camera 11 that shoots a first area at the rear side of a vehicle; a second camera 12 that shoots a second area further toward the inside in the width direction of the vehicle compared with the first area; an ECU 13 that combines videos captured by the two cameras; and a monitor 15 that displays the combined image. The first camera 11 is contained in an STSL 3 on a vehicle body side surface, and the second camera 12 is installed in an RCL 4 or a high mounted stop lamp at the rear of the vehicle body. A video processing circuit 14 performs correction to improve the visibility of the videos of an overlapping section captured by the cameras 11 and 12. The first camera 11 may be equipped with a wide-angle lens having a field of view angle greater than 90°.

The invention provides an adaptive power equalizing and voltage recovery control method for an island micro-grid. Various inverters obtain respective output voltages and output currents through a voltage sensor and a current sensor; active powers and reactive powers output by the inverters are calculated; the mean active power and the mean reactive power are obtained through a low-pass filter; by a sampling period control method, the inverters achieve communication-free power equalization by communication-free improved voltage droop control and traditional frequency droop control; various inverters are distributed with the same voltage droop coefficients and frequency droop coefficients; given voltages of voltage closed-loops are synthesized; voltage recovery is added to improved voltage droop control; coordination control of power equalizing and voltage recovery is achieved by a local pulse; and meanwhile, power equalizing and voltage recovery are achieved. The adaptive power equalizing and voltage recovery control method has the advantages of being high in reliability, convenient to control and the like.

The invention discloses a disk array based data processing method and a device. A data structure which is used for recording stripes and disks with read-write failed data blocks and restoring hot spare disks where restored data are arranged after data restoration of the data blocks is stored in a data storing system, and the disk array is subjected to read-write by the aid of a disk array manager according to the data structure. If the read-write fails, the stripes and disks with read-write failed data blocks are recorded in the data structure, and amount of the read-write failed data blocks in the stripes is summed. If the amount is not beyond that of the hot spare disks, the read-write failed data blocks are restored, the restored data are written into corresponding stripes of the hot spare disks, and the hot spare disks where the restored data are arranged are recorded. If the amount exceeds that of the hot spare disks but the exceeded amount is not beyond the fault tolerance of one stripe, the read-write failed data blocks are restored. The disk array based data processing method and the disk array manager can improve disk medium fault tolerance of disk arrays.

The invention discloses an interlocking system for particle dose safety protection. The system includes particle accelerators, an in-accelerator beam cut device, treatment room front end beam cut devices, a beam dose detection device, multiple treatment rooms, transmission system main line beam cut devices, a first controller and a second controller, wherein the beam cut devices are disposed in the particle accelerators, and the transmission system main line beam cut devices are disposed on a main beam transmission line. The system is advantaged in that the system is tested through beam dose monitoring devices in the treatment rooms, once the dose delivered to a patient body is found to be out of the safe range, interlocking is triggered immediately, the beam cut devices at the different locations in a particle therapy system are controlled for beam cut, in this way, the purpose of multi-point beam cut and redundant beam cut is achieved, safety and redundancy of the interlocking systemare guaranteed, and safety guarantee is provided for particle radiotherapy.

An optical observation device is connected to an extendable and retractable snorkel tube for above-water observation during the snorkel travel (travel at periscope depth) of the submarine. The optical observation device is designed as a compact unit which consists of an optronics unit with a short-travel drive. The compact unit is assembled on the snorkel tube. At least one further compact unit is provided which comprises at least one communication arrangement with a short-travel drive, wherein this further compact unit is likewise provided on the snorkel tube.

A high-load capability non-explosive cable release mechanism for retaining the adjacent ends of two cables and releasing them upon receiving a signal from a remote source. The cable release mechanism has a casing for housing two non-explosive actuators (NEAs), which also has a center bore for housing a jaw and ramp assembly. Each NEA is connected to the jaw and ramp assembly for independently operating the jaw and ramp assembly to retain or release the proximal ends of the two cables. Upon receiving the signal by any one or both of the NEAs, the jaw and ramp assembly will release the adjacent ends of the two cables from the casing.

The present invention is directed to systems and methods that couple together optical devices in a manner that prevents damaging light from escaping the coupling except through the devices. In order to prevent damaging light from coming into contact with the user, the present invention obscures the source optical device by using at least one moveable gate to prevent damaging light from being transmitted outside of the coupling until such time as the target optical device is fully inserted into the coupling, thereby preventing light that could potentially damage a person from escaping the system except through the optical device.

The invention discloses a train network communication realization method. According to the train network communication realization method, a communication data memory is divided into three blocks, initialization of the train network is carried out, and data communication is carried out according to a set memory address access method. The method is in combination with the characteristic that port data of train communication data has a fixed characteristic period, through the mode that the train communication data memory is divided into the three memory blocks according to different ports, so real-time access of a processor and a bus controller to the train communication data memory can be realized without conflict arbitration, data integrity and redundancy are guaranteed, processing efficiency of the processor is improved, power consumption is reduced, and the chip area is reduced.

An aircraft includes a supply system with an electrochemical reactor for generating energy, hydrogen, oxygen and clear water from grey water, a hydrocarbon containing fuel and air, so that the up to now separated systems for supply of clear water, generation of energy and generation of oxygen are combined to a combined system. The necessary redundancies may thereby secured by two or more systems of the same kind, which may be operated completely independently of each other.

The invention discloses a gas phase molecular absorption spectrometer with a redundant temperature control function, comprising a control device, a liquid path device, a gas path device and an opticalpath device; the control device is respectively in control connection with the liquid path device, the gas path device and the optical path device; the liquid path device comprises a sample introduction device, a sample mixing device and a reaction separation device, which are connected in series; the reaction separation device is connected to a heater; a temperature sensing mechanism is disposedbetween the heater and the reaction separation device; the temperature sensing mechanism comprises at least three temperature sensors, the temperature sensors are respectively connected to a voter, and the voter is connected to a display. According to the gas phase molecular absorption spectrometer with the redundant temperature control function in the invention, a temperature sensing mechanism is arranged between the reaction separation device and the heater, and the temperature sensing mechanism comprises at least three temperature sensors; and when the temperature values output by the twotemperature sensors are consistent, the voter outputs the value, thereby ensuring redundancy of temperature control of the spectrometer.