74results about How to "Realize distributed control" patented technology

The invention relates to a string photovoltaic power generation control system which comprises a system main controller and at least two photovoltaic DC (direct current) modules, wherein each photovoltaic DC module comprises a solar cell module, a photovoltaic slave controller and a storage battery module; the photovoltaic slave controller is used for tracking the maximum power point of the solar cell module and charging and discharging the storage battery module through the DC voltage output by the solar cell module; at least two storage battery modules are in string connection so as to output a high-voltage DC voltage; the system main controller comprises a control unit and an inverter unit; and the control unit is used for controlling the inverter unit to invert the high-voltage DC voltage, monitoring each photovoltaic DC module in real time and switching the abnormal solar cell module and / or the storage battery module in real time. By utilizing the technical scheme provided by the invention, a plurality of photovoltaic DC modules are in string connection to form a high-voltage DC power supply, so that the DC / AC (alternating current) inversion can be directly carried out, the traditional boosting transformer is omitted, and the energy conversion efficiency of the photovoltaic power generation system is improved.

The invention discloses a multipoint temperature collection system and a collection method thereof. The system comprises a plurality of temperature sensors which are hung on the same bus, and a PIC single chip control system, an RS232 communication module and a PC computer main controller which are sequentially connected with each other, wherein the PIC single chip control system is also connected with a liquid crystal display device and a keyboard, and the PIC single chip control system is also hung on the bus. The method comprises the following steps: performing initialization; issuing a jump ROM order by a host; re-issuing a uniform temperature conversion startup code by the host, waiting for one second, and re-initializing; and sequentially matching correspondent temperature sensors, storing the collected temperature into a memory space, and displaying the collected temperature on the PC computer main controller. The system and the method realize the distribution-type control, can display the temperature of individual point on the computer interface, and can read the temperature one by one in a short time, so the time value is smaller than that of the traditional way, and the efficiency is improved.

The invention relates to an integrated control system of a cable tunnel. According to the technical scheme, the integrated control system of the cable tunnel comprises a temperature measurement module and a main station; the temperature measurement module detects the temperature of the cable in the cable tunnel in real time, and transmits the cable temperature to a main station; and the main station acquires the cable temperature that the temperature measurement module detects, and outputs corresponding cable temperature, temperature pre-warning and temperature alarm signals after analyzing and processing the cable temperature. The system has the advantages of high automation degree, good real-time performance, safety and reliable monitoring, and convenient installation and repairing.

The invention discloses a digital addressable lighting system integrating the functions of safety protection and emergency recourse and a control method. The digital addressable lighting system integrating the functions of safety protection and emergency recourse comprises a personal computer (PC), a master controller and 1 to 64 nodes, wherein the 1 to 64 nodes are divided into lighting control nodes, lighting execution nodes, safety-protection control nodes and a safety-protection execution node; the PC is connected with the master controller by an RS232 serial port, and the master controller, the lighting control nodes, the lighting execution nodes, the safety-protection control nodes and the safety-protection execution node are all hung and carried on a digital addressable lighting interface (DALI) bus; and the system is based on a DALI protocol and follows the specifications of the DALI buses of a plurality of controllers. By setting the continuous inquiring time and the random-number collision waiting time of DALI bus nodes, the lighting control nodes, the safety-protection control nodes and the safety-protection execution node are additionally arranged on the basis of a traditional DALI lighting system according to the digital addressable lighting system integrating the functions of safety protection and emergency recourse and the control method so as to finish a set of DALI lighting system with the functions of safety protection and emergency recourse. A system integrating the function of safety protection is compatible to the traditional DALI lighting system; and the control flexibility is increased, and the total owning cost of a user is also lowered.

The invention discloses a continuous rolling and transmission monitoring system based on a PLC (Programmable Logic Controller) and a monitoring method of the continuous rolling and transmission monitoring system. The continuous rolling and transmission monitoring system comprises an upper monitoring unit, a middle network unit and a plurality of in-situ monitoring units, wherein the upper monitoring unit is communicated with the middle network unit through a second communication module; the middle network unit is communicated with the in-situ monitoring units through a first communication bus. The invention discloses the continuous rolling and transmission monitoring system based on the PLC and the monitoring method of the continuous rolling and transmission monitoring system; according to set control parameters and set operation parameters, a working state of a steel rolling set is controlled by controlling a transmission device through the PLC; working state data of the steel rolling set can be transmitted to an operator station in the upper monitoring unit through a network. A control system and the monitoring system are of a three-stage network structure. data communication between each two network structures is realized through a switch, and layered flowing of monitoring information streams can be conveniently realized; the continuous rolling and transmission monitoring system and the monitoring method, provided by the invention, are suitable for meeting control requirements of different types of management.

The invention discloses a distributed type low-speed high-precision device and method for controlling an astronomical telescope, wherein the device and the method are applied to distributed type high-precision control of the astronomical telescope. The device is composed of a field control box, a remote control box and a PC control desk. A driver and a main operation panel are contained in the field control box. A remote operation panel is contained in the remote control box. The PC control desk is composed of an industrial personal computer with an RS485 and operation software running on the industrial personal computer. The remote control box and the PC control desk of the device are in communication with the main operation panel of the main device field control box through an RS485 bus and send out operation instructions so that master-slave distributed type control can be achieved. The main operation panel sends movement control instructions to the driven device driver through a CAN2.0 bus to monitor the running state of the driver. The driver is connected with a motor line and a feedback line in the astronomical telescope, conducts power amplification on the movement control instructions and transmits amplified movement control instructions to a drive motor of the astronomical telescope, position traction interpolation is achieved at a reasonable speed inside power amplification, and precise control is achieved.

The invention relates to a laser forming method for a TiC-FeCr-Gr metal composite material component. Raw material powder selected in the method comprises 0.91-3.61 wt.% of graphite, 4.32-9.81 wt.% of Ti powder, 13.47-23.21 wt.% of Cr powder, 0.13-0.33 wt.% of rare earth oxide and the balance Fe powder. Quantitative feeding and mixing for the powder subjected to laser forming are completed through a multi-hopper spiral powder feeding and mixing system. Coaxial discontinuous powder spray nozzles serve as spray nozzles for laser forming. Formation of layered structures of the inner portion and the outer portion of the composite component is achieved by controlling powder feeding and laser through the system. The mechanical properties of the composite material can reach over 60% of that of matrix metal materials.

The invention discloses an audio-frequency output control method and device and a computer-readable storage medium. The method comprises: determining whether an audio-frequency data stream exists in an audio-frequency channel; if yes, monitoring the audio-frequency data stream, and determining the output source of the audio-frequency data stream; and if the output source is a headset, controlling a first audio frequency, output by the headset, through a wire control of the headset, and controlling a second audio frequency, output by a speaker, through a physical sound-volume key of a terminal. A humanized audio-frequency distributed-regulation scheme is realized, on the one hand, outputs of different audio frequencies can be respectively determined according to a current audio-frequency playing environment, and distributed-control of a plurality of audio frequencies is realized; and on the other hand, the corresponding control scheme can be determined according to a current audio-frequency playing device, and thus regulation operations are more convenient.