12 results about "Logic Control" patented technology

A method and apparatus is described for controlling accesses to a shared resource. An arbitration mechanism uses a register, accessible by each device sharing the resource. The register may be written by the device to request access to the resource, and read by the device to determine whether access to the resource has been granted. Advantageously, the register includes an override bit, which may be used by either device to override the peer device's request for the shared resource. In addition, the register includes a reset bit that may be used to reset arbitration logic controlling the access to the shared logic. The register is used by a straightforward arbitration mechanism that includes only IDLE and GRANT states for each device coupled to the shared resource. Such an arrangement provides a low cost method of controlling accesses to a shared resource.

Method of protecting a distribution network with a line interconnecting busbars, each busbar being connectable, by means of switching devices adjacent to the busbar, to the line and to loads and/or generators. The method divides the distribution network in multiple protection areas, each comprises a busbar, a protection device and an area controller. Upon a change in connect status of a distribution feeder line, load or generator connectable to one of the busbar, the logic controller in this protection area re-calculates the short circuit level of the areas. Based on the recalculated short circuit levels, the protection settings of the areas may be adapted. The embodiment also provides a system and computer program product adapted to perform the method.

The power supply includes parts: power end, high voltage circuit (HVC) connected to the power end, first logic control circuit in use for controlling and driving HVC, the filament circuit (FC) with its input end being connected to the power end, and second logic control circuit in use for controlling and driving FC. The method includes steps: variable frequency control is adopted in the power portion in high voltage; adjusting switching frequency adjusts the input power; using voltage feed forward ensures stable output power approximately when the voltage of input power source changes; half bridge circuit (HBC) or single tube circuit (STC) is adopted in FC; the on time of one switch tube in HBC is fixed, and the on time of the other switch tube is varied with feed back. Main circuit decides the turn off time of STC, and turn on time is controlled by feedback. Scheme of separating FC from HVC possesses high adaptability to magnetron, single tube adopted in HVC so as to lower cost.

The invention discloses a multichannel battery sampling circuit and a sampling method thereof. The multichannel battery sampling circuit includes a battery pack, a channel switch unit, a battery voltage difference processing unit, a channel switch control unit, a micro-processing unit and a switch control circuit, wherein the battery pack is connected with an input end of the channel switch unit; an output end of the channel switch unit is connected with the battery voltage difference processing unit; an output end of the battery voltage difference processing unit is connected with the micro-processing unit; and an output end of the micro-processing unit is connected with the channel switch unit through the channel switch control unit. By adopting the structure, the invention has the advantages that, firstly, as the battery voltage sampling channels can be switched according to the logic control signals issued by the mirco-processing unit, the sampling method can improve the battery voltage detection precision and avoid the big power consumption during system hibernation; secondly, the system performance is improved; and thirdly, the system structure is optimized, and the reliability, the flexibility and the performance price ratio of the system are improved.

The embodiment of the invention provides a biogas fermentation gas supply engineering control system, comprising a master control sub-system, a programmable logic controller (PLC) control sub-system, a local control sub-system and a controlled sub-system, wherein the PLC control sub-system is respectively connected with the master control sub-system and the local control sub-system; the controlled sub-system is connected with the local control sub-system; the controlled sub-system comprises a material collecting unit, a degritting blending unit, a biogas generating unit, an air storage unit, a mud-water separating unit and a biogas power generation unit; the master control sub-system is used for automatically controlling the controlled sub-system through the PLC control sub-system; and the local control sub-system is used for switching the controlled sub-system between a local manual control state and a remote control state. By adopting the system, the instantaneity, the stability and the reliability of a biogas fermentation gas supply system are significantly improved; information management is facilitated; the operating cost is reduced; the working efficiency is improved; an accident is prevented; and the biogas fermentation gas supply engineering control system has high practical application value.

The invention discloses an intelligent monitoring system and method for the service life of a cutter, the monitoring system comprises a workshop field layer, a unit general control layer, a workshop general control layer and a visual management and control layer, and the workshop field layer is used for providing real-time field data for the system; data acquisition lines are arranged on field machine tools, online tool positions and tool states of the machine tools are acquired in real time, original data are provided for visual management of tool monitoring, and the unit general control layer is used for realizing logic control among equipment in each unit of the workshop field layer and realizing information acquisition of bottom-layer equipment and information feedback to upper-layer equipment. According to the invention, the full-chain systematic management of the cutter flow is realized; according to the method, the residual life of the tool is predicted by adopting a mode of accumulating the number of machined workpieces configurable by a strategy or accumulating machining time, and then an online monitoring visual management function with a more reliable and more scientific prediction result and a more accurate numerical value for the residual life of the tool is realized by utilizing an early-warning value of the service life of the tool set by the system.

The invention discloses a terminal capable of simultaneously recording the passage logic cases of multiple gate machines. The terminal comprises a test platform pedestal, two test platform frames; multiple correlation sensors; a record playback module and an I/O switching control panel. The two test platform frames are arranged in parallel and separately installed on the test platform pedestal; multiple longitudinal supports and multiple transverse sliding rods are installed on the test platform frame; two ends of each sliding rod are separately installed on the two corresponding longitudinalsupports; the multiple correlation sensors are installed on the sliding rods; the record playback module is installed on the test platform frame and electrically connected each correlation sensor; andthe I/O switching control panel is installed on the test platform framework and electrically connected with the record playback module, and the I/O switching control panel is used for electrically connecting the passage logic control panel of the gate machine to be detected. Visibly, by using the terminal provided by the invention, the automatic recording of the passage logic cases can be achieved, the passage logic cases of the multiple gate machines can be recorded and generated at a time, and the status data of the passage logic sensors of the multiple gate machines can be collected at thesame time, so that the consistence of the recording standards of the passage logic cases is ensured.

The invention provides a combinable circuit structure, aiming at the shortcomings of flexibility and the stretchability deficiency of the existing electronic technology. The combinable circuit structure comprises a basic unit, a power supply system, and a load, wherein the basic unit comprises a control electrode, an effect electrode, a liquid container, liquid metal, and dielectric. Through the micro-machining and microfluidic methods, the flexible stretchable electronic logic element structure is realized by using the electronically controlled deformation characteristics of the liquid metal;by combining a plurality of basic combinable circuit structures, an arbitrary logic control structure can be realized; and the circuit structure can be used for rapid manufacturing of flexible digital circuits and logic control circuits, and has high application value and development prospect.

The invention discloses a method for quickly generating a programmable logic control function block code, which comprises the following steps of: establishing a mathematical model, and compiling a corresponding performance function based on Simulink in Matlab software; creating the mathematical model into a subsystem, and then carrying out subsystem parameter configuration; carrying out system compatibility detection on the mathematical model, and building a simulation model of the controlled object on the basis of passing the detection; according to the simulation model, using simulation of Simulink to obtain an optimal solution of a control algorithm; according to a controlled object controller development environment, a programmable logic control function block code is generated from a control algorithm; and then the code is imported into a controller development environment of the controlled object, and software and hardware debugging is carried out until the actual requirements and functions of the controlled object are realized. According to the technical scheme provided by the invention, a reference can be provided for compiling a complex algorithm of the programmable logic controller based on a powerful computing power and a flexible programming mode of the Matlab, and the system design and debugging time is shortened.