99 results about "Electrical telegraph" patented technology

A method for operating a redundant communication network with network participants includes determining—via a telegram—by network participants to which network channels they are connected.

The invention discloses a control operation quality diagnostic system and a diagnostic method. The control operation quality diagnostic system comprises a data acquisition server for collecting telegram data and comprehensive flight path data of an aeronautical fixed telecommunication network (AFTN), an audio acquisition industrial personal computer (IPC) for collecting interphone voice signals, a user access client side, a server and a system management personal computer (PC). The data acquisition server, the audio acquisition IPC, the user access client side, the server and the system management PC are connected through an air control network B. The control operation quality diagnostic method is achieved through the control operation quality diagnostic system. The control operation quality diagnostic system and the diagnostic method can provide quantizable measuring tools and evaluation tools for flow control effects, control interval safety redundancy, control position workload and the like, and achieve effective evaluation to the flow control effects and control operation risks.

In a serial bus system data in the form of telegrams, representing process images of control tasks of the active station, are transmitted to the connected passive stations, and the process data are allocated to the process images in the passive station.

Ship rudder control, so-called autopilot, includes a multiplicity of components connected with a bus interface to a CAN bus and via this also to each other. A further bus interface on each component of the control system is coupled to a separate, second bus, with the components being provided with unambiguous addresses and further information being assigned that mark the components as monitorable or non-monitorable. A device for emitting telegrams of component addresses and monitorability. A first comparator on all monitorable components start or switch off their own property as a monitoring component using the addresses of other components in received telegrams by comparison, and a second comparator on all monitorable components that use the number of received telegrams by comparison with the number of telegrams received on the other channel causing a change of the channel to that with the higher number of received telegrams under certain circumstances.

The embodiments of the invention disclose a parameter measurement method for high-voltage and ultra-high-voltage direct-current transmission lines. According to the method, a direct-current transmission line model having distributed-parameter characteristics is constructed. Meanwhile, the expression of the impedance per unit length and the admittance per unit length, corresponding to the direct-current transmission line model, is established, wherein the earth resistance is involved. During the resolving process of a mathematical model, a homogeneous differential equation between the voltage and the current of the line in the boundary condition is solved to obtain a two-port power transmission line equation, wherein a telegraph equation is involved. After that, assisted by the open-circuit measurement means and the short-circuit measurement means at the end of the transmission line, the open-circuit impedance and the short-circuit impedance at the sending terminal of the transmission line are respectively measured. Furthermore, the distribution parameters of the direct-current transmission line are solved out and a computational formula for the earth resistance per unit length is given. According to the technical scheme of the invention, initial measurement data are acquired through constructing the transmission line model. Meanwhile, the two-port power transmission line equation is solved accurately. Therefore, the precise distribution parameters of the direct-current transmission line can be obtained.

Exemplary methods and systems are directed to transmitting a process map of a control or automation system via a gateway device. The gateway device includes at least one first functional unit connected to a higher-ranking control unit via a first communications link based on a primary field bus protocol, and at least one second functional unit connected to at least one field device via a second communications link based on a secondary field bus protocol. Binary signals are stored in corresponding registers and analog signals, which are in an integer format, are transmitted to the first functional unit such that the number of binary signals is reduced by packing the binary signals into data bytes. The data bytes are translated into corresponding telegrams that can be processed by the primary field bus protocol and with the analog signals are transmitted to the higher-ranking control unit.

The invention discloses a method for realizing intelligent sending of a civil aviation telegram through a computer. The method comprises the following steps: S1) receiving an FPL telegram; S2) verifying the telegram format of the FPL telegram, and if the verification result is right, carrying out the step S3); S3) verifying take-off and landing airports, flight number and take-off and landing timeof the flight in the FPL telegram, and if the verification result is right, carrying out the step S4); S4) searching whether a flight plan of the flight exists, and if the flight plan exists and thetake-off and landing airports of the flight belong to a current control area, carrying out the step S5); S5) carrying out airway verification of the flight, and if the airway verification result is right, carrying out the step S6); S6) judging whether the FPL telegram needs forwarding, and if so, carrying out the step S7); and S7) forwarding the FPL telegram to each telegram reception address of each control area along an estimated air route of the flight. The method realizes automatic processing of reception, verification and forwarding of the civil aviation telegram and improves working efficiency.

A method for plant monitoring with a fieldbus of process automation technology, wherein a plurality of field devices communicate with a process control unit and a plant monitoring unit The method steps are carried out as follows: the regular, process-control, data traffic on the fieldbus is monitored by the plant monitoring unit; an examination of the telegrams of the regular data traffic for information indicating a diagnostic event at one of the field devices is performed; and in case a telegram is detected having an indication of a diagnostic event, the plant monitoring unit requests further diagnostic information from the pertinent field device.

The invention discloses an automatic processing method of a civil aviation approval message. A flight plan coordination seat receives an approval message plan from the superior; message parsing processing is carried out as well as static flight plan data are generated and are stored in a database; meanwhile, a background server is notified; and according to the approval message plan that has been processed by the parsing processing, the background server updates a flight plan database of a current day or of the next day and issues a latest current day plan and a latest next day plan to all controlled seats, so that a complete and accurate flight plan that is managed by editorial staff is formed. According to the invention, automatic parsing processing is carried out on all approval messages; therefore, working burdens of editorial staff are substantially reduced; an identification rate and efficiency of parsing are improved; and timeliness of each of the messages can be ensured.

A method (and system) for generating random numbers includes setting a drain voltage Vd on an MOSFET device to maximize a transconductance of the MOSFET device and setting a gate voltage Vg of the MOSFET device to tune as desired a random number statistical distribution of an output of the MOSFET device> The MOSFET device includes a gate structure with an oxide layer including at least one artificial trapping layer in which carrier traps are designed to occupy a predetermined distance from conduction and valance bands of material of the artificial trapping layer.

The invention discloses an intelligent monitoring method for preventing external breakage of a constructing machine for power lines. A near-electricity alarming induction end is installed on a mobile arm of a large mobile device and inducts voltage, and a system sends messages to a driver in a wireless mode and continuously sends messages to far-off relevant protecting personnel for electric power facilities through telecommunication in a wireless mode; a radar ranging device is installed on the large mobile device so that semispherical and radial radar waves can be formed; GPRS positioning systems are installed on vehicles in forcible braking, the orientation and relevant information of the vehicle in danger are sent to the protecting personnel for the electric power facilities, and accurate, convenient and fast approaches are provided for the protecting personnel for the electric power facilities to rush to trouble causing sites to stop and handle troubles. The electric power facilities can be protected and managed easily, and even though unmanned line patrol is performed, whether there are large machines in a line protecting area or not can be known in time through positioning management of the system.