24 results about "Automatic power control" patented technology

The utility model discloses a cluster channel machine based on RF Transceiver software radio, which comprises an FPGA, a DSP, an ARM, a clock management chip, an LNA, a PA, a DSA and a SAW Filter, the FPGA is respectively connected with the DSP, the ARM, a Flash3 and the clock management chip, the DSP is connected with an SDRAM1 and a Flash1, the ARM is connected with an SDRAM2 and a Flash2, the clock management chip is connected with a TCXO, the cluster channel machine comprises an RF Transceiver connected with the FPGA and the clock management chip, the input end and the output end of the RF Transceiver are both connected with the SAW Filter, and the input end and the output end of the RF Transceiver are connected with the LNA, the PA, the DSA and the SAW Filter. And the LNA, the PA, the DSA, the SAW Filter and the RF Transceiver are sequentially connected and arranged to form an RF RX receiving channel and an RF TX transmitting channel. According to the utility model, the circuit of an RF transmitting and receiving channel is simplified, multiple paths of radio frequency signals can be directly adopted, the radio frequency signals from 300MHz to 6GHz are output, and the functions of digital filtering, digital up and down converters, digital combination, modulation and demodulation, automatic power control and the like are integrally realized; different functions can be realized by loading different waveforms, different requirements can be met without changing hardware, the cost, the power consumption and the size are reduced, the debugging process is reduced, and the production is more convenient.

The invention discloses a power stabilizing method and an adjusting system of a frequency doubling laser. The stabilizing method comprises the following steps: acquiring the actual output power of the frequency-doubled laser; acquiring target output power and a set temperature value of the frequency doubling laser; and if the target output power is within the jump range of the output power of the frequency doubling laser, entering automatic power control after delaying for a preset time length. According to the technical scheme provided by the embodiment of the invention, the problems that the optimal temperature of the frequency doubling crystal dynamically changes along with the power and the environment, so that the output power of the frequency doubling laser is unstable and fluctuates are solved.

The invention discloses a method for realizing automatic optical power control by a centralized controller. The method comprises the following steps: step 1, acquiring a network topology structure; 2, APC parameters are configured; step 3, service opening information; step 4, calculating configuration parameters; step 5, issuing a control command; according to the method, the optimal output power of each amplifier can be globally, automatically and accurately controlled by monitoring the global service condition of the network and the conditions of equipment and lines, manual participation in network optimization is not needed, high-efficiency and low-cost operation and maintenance are achieved, and the operation efficiency is improved. And the optimal target output power of the amplifier on the line can be automatically calculated by monitoring business, network equipment and line conditions to realize network balance so as to protect the safety of the network and the equipment, and meanwhile, the automatic power control method enables the network to dynamically adjust the power according to actual load and business requirements so as to realize the target of improving the network quality.

The invention relates to a control method and device for a high-temperature gas cooled reactor, and the method comprises the steps: responding to a received power automatic control instruction inputted by a user, and obtaining a power automatic control parameter; and performing rod position control on each control rod in a control rod group of the high-temperature gas cooled reactor based on the automatic power control parameters, and acquiring and displaying at least one parameter of the high-temperature gas cooled reactor in the rod position control process.

Embodiments of the present application provide a timing control method and device of a laser scanning unit and an image forming device. The method comprises: starting a laser scanning unit motor, controlling a laser diode to emit light through an automatic power control signal, and controlling the laser diode to not emit light when a line synchronization signal is detected; predicting a time when a next line synchronization signal is generated through a position signal used to indicate a position of the laser scanning unit motor, and driving the laser diode to emit light in advance to generate the next line synchronization signal, and triggering initialization of the laser scanning unit with the next line synchronization signal. By driving the LD to emit light to detect the line synchronization signal when starting the LSU motor, and predicting the time when the next line synchronization signal is generated, the LD is driven to emit light in advance before the next line synchronization signal is sent, so that the time when each line synchronization signal is sent can be accurately determined without waiting for the LSU motor to rotate stably, the printing time of a first page can be shortened, and the printing efficiency can be improved.

The invention relates to the technical field of power system dispatching automation, and discloses an industrial user automatic power control method and device, equipment and a medium. The method comprises the following steps: acquiring static archive data and real-time operation electrical parameters of an industrial user through an automatic power control device, and storing the operation data in a database according to the granularity of 15 minutes; the static file data at least comprises total adjustable capacity, adjustable capacity upper and lower limits and rated capacity; when no production plan exists, similar days are selected according to historical data, and a load curve of 96 points in the next day is predicted by adopting a preset algorithm; calculating the up-regulation capability and the down-regulation capability of 96 time points in the next day in combination with the predicted load data and resource model parameters; the resource model parameters comprise rated capacity and adjustable upper and lower limits; the regulation capability is uploaded to a power grid regulation and control platform, and a plant plan curve generated by the platform is received; and based on the plant plan curve, target power of 96 points is decomposed, and equipment in the plant is controlled according to the decomposed target power.

This invention discloses a dual-beam laser diode driving circuit based on the RN5C711, suitable for laser printers and digital copiers. The circuit uses a +5V power supply to power the AVCC, DVCC, and LDV pins of the RN5C711. The two laser diodes are connected to the LD1 and LD2 pins of the RN5C711 respectively, and independent automatic power control is achieved through adjustable resistors. It receives LVDS format data input and has overcurrent and power abnormality protection mechanisms. This circuit solves the problems of insufficient current control accuracy and lack of protection in existing technologies, achieves stable laser intensity output, extends the lifespan of the laser diodes, and is simple in design and easy to debug.

The invention discloses an electric heat tracing automatic control integrated circuit and a junction box. The integrated circuit comprises a power supply module, a conversion module, a load module, an NTC (Negative Temperature Coefficient) module, a display screen module and a system board module which are arranged on an integrated PCB (Printed Circuit Board), the power supply module supplies power to the conversion module, the NTC module, the display screen module and the system board module, the NTC module is provided with an electric heat tracing temperature signal cable access terminal and is used for transmitting an output signal to the system board module, the system board module is a main control module of an integrated circuit, and the terminal of the system board module is respectively connected to each module and each key. And the conversion module is connected with and receives an input signal of the system board module, is connected with and outputs to the load module after being converted by a conversion signal, and is used for controlling the load module to regulate voltage, and the load module is connected with and outputs to the electric tracing band for power supply. According to real-time temperature and system parameter setting, automatic power control of electric heat tracing is achieved.

The application relates to a switch cabinet for automatic control of an intelligent power grid and an overload control method thereof, which comprises a cabinet body, a static contact is arranged on a wiring board, a rotary disc is arranged on a wiring block, a switch blade is arranged in the cabinet body, a fuse is arranged on the switch blade, a moving contact is arranged on the other end of the fuse, a separation structure is further arranged on the switch blade, the separation structure can drive the rotary disc to rotate, an induction structure is arranged on the cabinet body, the induction structure comprises a heating resistor connected with a line, the rotary disc and the induction structure are connected through a one-way driving structure, the induction structure can drive the rotary disc to rotate through the one-way driving structure, so that the moving contact is in contact with the static contact or is separated from the static contact, a signal receiver is further arranged in the cabinet body, the state of the line can be monitored in real time through the induction structure, the induction device can monitor the load through resistance heating, the error of the induction value is small, the fluctuation is small, and the line has hysteresis when the line is restored to the pass-through state.

In some examples of the techniques described herein, power control schemes between an interrogator mode and a tag response mode of a reader device may be separated to operate at different power amplifier bias points, which may reduce battery power consumption. In some examples, automatic power control in a physical layer may be implemented to achieve a target range at a reduced battery power consumption. In some approaches, tuning may start at a relatively high (e.g., maximum) transmit power and is gradually converged to a lower power level based on a received signal strength indicator (RSSI) through a binary search or similar procedure to determine the power level. In some of the approaches described herein, tuning may begin at a lower (e.g., median) transmit power level, and may avoid the higher transmit power scenario, which may reduce or avoid heavy battery loading.

The present application relates to a kind of high-precision calibration system of laser cutting to APC circuit, belong to laser automatic power control technical field.For the calibration difficulty caused by the large discrete tolerance of stabilizing diode, the discrete laser tube parameter of existing APC loop, and the problems such as traditional calibration needing optical power detection equipment and low efficiency, the system includes standard laser module, APC module to be calibrated, laser cutting equipment, voltage detection unit, calculation unit and control unit.Reference parameters are provided by standard laser module, detection voltage V_TP806 in the automatic power control loop when the APC module to be calibrated is powered on is detected, the preset current Im of the laser module to be matched is combined, the target resistance value is calculated according to the formula R0=V_TP806 / Im, and the resistance value of the cuttable film sheet resistance R0 in the APC loop is adjusted by controlling the laser cutting equipment.The system does not need optical power detection equipment, eliminates multivariable interference, has high calibration accuracy, low cost, meets the stable performance requirements of vehicle level-40~85℃ temperature range.

The invention discloses a double-beam laser diode driving circuit based on RN5C711. The double-beam laser diode driving circuit is suitable for a laser printer and a digital copying machine. The circuit adopts a + 5V power supply to supply power to AVCC, DVCC and LDV pins of the RN5C711, double laser diodes are respectively connected with LD1 and LD2 pins of the RN5C711, independent automatic power control is realized through an adjustable resistor, LVDS format data input is received, and an overcurrent and power supply abnormity protection mechanism is provided. The circuit solves the problems of insufficient current control precision and protection deficiency in the prior art, realizes stable output of laser intensity, prolongs the service life of a laser diode, and is simple in design and easy to debug.

The invention relates to an intelligent power grid automatic power control switch cabinet and an overload power control method thereof. The intelligent power grid automatic power control switch cabinet comprises a cabinet body; the wiring board is provided with a static contact. A turntable is arranged on the wiring block; a knife switch is arranged in the cabinet body; a fuse is mounted on the knife switch; the other end of the fuse is provided with a movable contact; the knife switch is also provided with a separation structure which can drive the rotating disc to rotate. A sensing structure is arranged on the cabinet body; the induction structure comprises a heating resistor connected with the circuit; the turntable is connected with the sensing structure through a one-way driving structure; the induction structure can drive the rotating disc to rotate through the one-way driving structure so that the movable contact can abut against or be separated from the static contact. A signal transceiver is also arranged in the cabinet body; the state of the line can be monitored in real time through the sensing structure; as the sensing device monitors the load through resistor heating, the sensing numerical value error is small, the fluctuation is small, and the circuit is delayed to recover the access state again.

The application discloses an optical frequency comb repetition frequency locking device and method based on automatic power control, and relates to the technical field of optical frequency combs. The device comprises an optical frequency comb optical system, a fiber length automatic control system and an automatic power control system. The optical frequency comb optical system is used for generating an optical frequency comb repetition frequency. The fiber length automatic control system locks the optical frequency comb repetition frequency output by the optical frequency comb optical system. The automatic power control system is used for adaptively adjusting the signal power size in the corresponding link when the optical frequency comb light power or the reference source power changes, so that the input power of the local oscillator and the radio frequency port of the mixer is maintained at a predetermined power. The technical scheme of the application improves the stability and accuracy of the input power of the radio frequency and local oscillator ports of the mixer, strengthens the suppression of noise in the link, enables the phase-locked loop of the fiber length automatic control system to be maintained in the best working state for a long time, and improves the practicability of the optical frequency comb product.

In some examples of the techniques described herein, power control schemes between an interrogator mode and a tag response mode of a reader device may be separated to operate at different power amplifier bias points, which may reduce battery power consumption. In some examples, automatic power control in a physical layer may be implemented to achieve a target range at a reduced battery power consumption. In some approaches, tuning may start at a relatively high (e.g., maximum) transmit power and is gradually converged to a lower power level based on a received signal strength indicator (RSSI) through a binary search or similar procedure to determine the power level. In some of the approaches described herein, tuning may begin at a lower (e.g., median) transmit power level, and may avoid the higher transmit power scenario, which may reduce or avoid heavy battery loading.

The invention provides an automatic power control circuit with a constant temperature control function. The automatic power control circuit comprises a variable gain amplifier, a directional coupler, an integrating circuit, a detection circuit and a constant temperature control circuit, the variable gain amplifier amplifies the power of the microwave signal to P1, and outputs the microwave signal of P1 to the directional coupler; the directional coupler outputs a 0.9 P1 microwave signal, and the other 0.1 P1 microwave signal is coupled to the detection circuit; the detection circuit converts 0.1 P1 power of the coupled microwave signal into a direct current level, and outputs a converted level value V0 to the integrating circuit; the constant temperature control circuit automatically controls the temperature of the detection circuit at a preset temperature fixed point in a heating mode; the integrating circuit compares the conversion level value V0 output by the detection circuit with a reference level value V1 input from the outside to control the increase and decrease of the output control level Vt; the control level Vt is used for controlling the gain of the variable gain amplifier; according to the invention, the output signal power in the microwave emission system can be automatically controlled.

A system for operating one or more light-emitting devices, comprising: an illumination array (20, 20A, 20B, 20C) consisting of at least one light-emitting device (110); at least two negative temperature coefficient devices (314, 316, 318) in thermal communication with the illumination array (20, 20A, 20B, 20C); and an operational amplifier (222, 302) having a negative feedback loop (350), wherein the at least two negative temperature coefficient type devices (314, 316, 318) are electrically coupled in parallel and are included in the negative feedback loop (350), the system further comprising two fixed value resistors (310, 312) in the negative feedback loop (350), and wherein a first of the two fixed value resistors (310, 312) is in direct electrical connection with an inverting input (303) of the amplifier (222, 302) and an output (305) of the amplifier (222, 302), and wherein a second of the two fixed value resistors (310, 312) is connected to the first of the two fixed value resistors (310, 312), the inverting input of the amplifier (222, 302), and the at least two negative temperature coefficient type devices (314, 316, 318) are in direct electrical connection.

The invention discloses a pulse-driven ultraviolet LED current source for charge management and an automatic optical power control method, and belongs to the technical field of ultraviolet LED current source control. In order to solve the problem that an ultraviolet LED current source controls accurate output of ultraviolet light power, a pulse waveform generation unit comprises an FPGA (Field Programmable Gate Array) and a digital-to-analog conversion unit; the current source unit comprises an enhanced HOWLAND current source and an ultraviolet LED lamp; the signal acquisition unit comprises a current detection circuit, a voltage detection circuit, an ultraviolet light power detection circuit, two temperature detection circuits and an analog-to-digital conversion unit; the upper computer is connected with the FPGA, the FPGA is respectively connected with the digital-to-analog conversion unit and the analog-to-digital conversion unit, and the digital-to-analog conversion unit is connected with the enhanced HOWLAND current source; the enhanced HOWLAND current source is connected with the current detection circuit, the voltage detection circuit, the temperature detection circuit and the ultraviolet LED lamp. According to the invention, dynamic self-adaptive regulation and control of the optical power are realized.

The invention provides an automatic power control circuit of an optical communication chip. The automatic power control circuit is coupled to a digital control unit and a DC-DC converter. The automatic power control circuit includes: a digital-to-analog converter coupled to a digital control unit, the digital-to-analog converter receiving a digital code generated by the digital control unit to generate a digital-to-analog converter output voltage; an output buffer circuit coupled to the digital analog converter and the DC-DC converter, the output buffer circuit providing an internal node voltage; and the analog-to-digital converter is coupled to the output buffer circuit and the digital control unit, and the analog-to-digital converter controls a supply voltage output by the DC-DC converter through the digital-to-analog converter, so that a voltage difference between the supply voltage and the internal node voltage is maintained within a normal working range interval.

The invention discloses an automatic power control method for an elastic power distribution network, and the method is suitable for the elastic power distribution network which comprises a plurality of endpoints. The method comprises the following steps: acquiring topological information of a communication network of a current elastic power distribution network, and generating a communication link matrix corresponding to the current elastic power distribution network according to the topological information; according to the communication link matrix and the output power output by the converter port of each new energy DG, obtaining the reference power automatically controlled by the elastic power distribution network; calculating a power instruction value of droop control of each new energy DG according to the reference power; and performing droop control on each DG in the elastic power distribution network according to the power instruction value during droop control. According to the invention, when the network fails and the network topology is changed, the output power of the power distribution network can reach the preset power in a self-adaptive manner through droop power control, so that the power lost by the failed line is made up.

The utility model relates to the technical field of electric power generation, in particular to an electric heat tracing monitoring system. Comprising a plurality of temperature controllers arranged in an instrument heat preservation box and used for obtaining corresponding instrument conduit temperatures; the data input end of the master control device is in communication connection with each temperature controller, and the control signal output end of the master control device is in communication connection with the electric tracing band working power supply corresponding to each temperature controller. A hardware connection framework of a plurality of temperature controllers and a main control device is arranged, a traditional temperature control mode depending on manual operation is converted into an automatic power supply control mechanism based on a preset temperature threshold value, and independent monitoring and control of each instrument conduit are achieved.

The invention discloses a long-distance card swiping system for a highway CPC card and an implementation method, the long-distance card swiping system comprises a computer host, a local card reader, a far-end machine, a near-end machine and a card swiping antenna, information reading of the CPC card as long as several kilometers is achieved through low-cost optical fibers, the flexibility of facility arrangement of the highway is greatly expanded, the operation cost is reduced, and the service life of the highway is prolonged. The economic benefit is improved; according to the system, complex application scenes of different distances are considered, and an automatic power control circuit is added, so that the performance of long-distance reading of the CPC card cannot be reduced due to different distances, and the adaptability and the stability of the system are greatly improved; the method is easy to implement, engineering application is convenient, the method can be rapidly applied to the actual environment, and the practical value is very high.

The invention provides a radio station power automatic control method and device, electronic equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: acquiring a configuration file of a radio station and a changed set frequency, and acquiring an acquired voltage signal under the condition that an impedance coefficient corresponding to the set frequency does not exist in the configuration file; calculating actual power according to the voltage signal, and calculating an impedance coefficient by using the actual power and the voltage signal; calculating the actual power and the set power to obtain an error value; and under the condition that the error value is greater than a preset power threshold value, adjusting the power supply voltage according to the error value, collecting a voltage signal according to a preset sampling period, executing the step of calculating the actual power according to the voltage signal, and ending the adjustment of the power supply voltage until the error value is less than or equal to the power threshold value. The set frequency, the power supply voltage corresponding to the set frequency and the impedance coefficient corresponding to the set frequency are written into the configuration file, and the output power can be accurately set.

The invention discloses a distributed multi-node fine-grained automatic power control method based on TDMA (Time Division Multiple Access), which is divided into two conditions, one condition is that one node sends data to the other node, and the other condition is that one node sends data to a plurality of nodes. The condition that one node sends data to the other node specifically comprises the following steps: S1, dividing a time frame into a control time slot and a service time slot; s2, each node reserves a service time slot for the node at the respective control time slot for data transmission; s3, in the service time slot, each sending node obtains the receiving power information, and each sending node adjusts the transmitting power; each node dynamically adjusts the transmitting power of each time of data for different receiving nodes by taking a time slot as a unit, and the receiving nodes dynamically adjust the receiving gain for different transmitting nodes, so that each receiving node can receive the data within a normal range of the signal receiving power, and the purpose of optimizing the whole network is achieved.