146results about How to "Flexible and accurate control" patented technology

A system and related method for monitoring plant growth conditions is provided, comprising a plurality of detectors (7) and central detector data processing means (1103); each detector (7) being arranged to measure properties indicative of a temperature, a water content, and a nutrient content, of a plant growth substrate; each detector (7) being further arranged to transmit the measured property or properties over a communications link to the central detector data processing means (1103); the central detector data processing means (1103) being arranged to store predefined irrigation data, defining a relationship between plural values for temperature, water content, pH level and/or nutrient content of the plant growth substrate; and plural desired irrigation output values; process the measured properties from each detector (7) to determine calculated properties of the substrate; and provide an output indicative of a desired irrigation input for the growth substrate, based upon measured properties received from the detectors (7) and the predefined irrigation data. A portable detector communications device (1105) for communicating configuration data relating to the detectors (7) may be included in the system.

The invention discloses a vehicle-mounted composite power supply system of an electric vehicle and a control method. Through a voltage and current acquisition circuit, a voltage value and a current value of a motor inverter end, and voltage values of a battery set and a supercapacitor are obtained, and the processed to obtain required power, battery set SOC and supercapacitor SOC, which are used as decision-making input variables of a fuzzy logic control module. According to actual operation working conditions of the electric vehicle, a proper logic threshold value control strategy is formulated and by use of fuzzy control, fuzzification is performed on fixed rule parameters in a logic threshold, so rules are further refined, control thinking is further precise and results are further optimized. Compared with real-time power, the peak value of actual average power and the switching frequency are greatly reduced. By combining the power hysteresis control, the switching frequency of working modes of the system and the output frequency of the battery set are further improved, energy loss, caused by mode switching, of a vehicle-mounted double-energy system is reduced, service lifetime of the battery set is prolonged and efficiency and stability of the system are improved.

The invention provides an air conditioner control method and system on the basis of an environment sensor of a mobile terminal and is applicable to the technical field of air conditioner control. The air conditioner control method includes acquiring current position data of the mobile terminal; acquiring current environment information data by the environment sensor on the mobile terminal when the mobile terminal detected is within a preset position range; controlling an air conditioner into a corresponding operation mode according to the environment information data and preset control rules. Since the mobile terminal is closer to a user, the acquired environment information data of the mobile terminal are more accurate than data acquired by a sensor on the air conditioner, the air conditioner can be more flexibly and accurately controlled according to the environment information data, and amenity in a room of the user is improved.

The invention relates to a comprehensive monitoring control system of a gas station and a monitoring control method thereof. An oiling machine is provided with a signal acquisition board, branches of an air-return pipeline are provided with gas flowmeters, the upper part of an oil tank is provided with a pressure sensor, a leakage sensor is arranged on the bottom of the oil tank and an oil conveying pipeline and under the oiling machine respectively, a power supply circuit of an oil-gas post-treatment device of the oil tank is provided with a current transformator, a main board of the oiling machine and the gas flowmeters are connected with the signal acquisition board, the signal acquisition board is connected with a monitoring controller, the pressure sensor, the leakage sensors and the current transformator are connected with the monitoring controller, and the monitoring controller is connected with an upper computer. The monitoring control method comprises the following steps that: 1) the signal acquisition board acquires oil-loading and air-return flow signals; 2) signals of the signal acquisition board, the leakage sensors, the current transformator and the air-return pressure sensor are input into the monitoring controller; and 3) the monitoring controller processes the signals, alarms, and outputs and uploads data. The comprehensive monitoring control system of the gas station and the monitoring control method thereof are suitable for comprehensive monitoring of the gas station, and have the advantages of accurate control as well as good environmental protection and safety guarantee performances.

The invention offers a regenerative optical amplifier enabling voltage to be easily applied to polarizing elements such as Pockels cells, without the need for complicated drive circuitry. An input beam of S-polarized light is reflected by a polarizer 1 and advances to a Pockels cell 2. In the time it takes for the input beam, having once passed through the Pockels cell 2, to be reflected by a reflective mirror 3 and return to the Pockels cell 2, a voltage V_P1 causing a 90-degree rotation in the polarization of transmitted light is applied to the Pockels cell 2, and this applied voltage V_P1 is maintained. The input beam is converted by the Pockels cell 2 into a P-polarized light pulse which is transmitted by the polarizer. Subsequently, the light pulse is converted from P-polarized light to S-polarized light and back to P-polarized light with each roundtrip of the Pockels cell 2, while passing each time between the reflective mirror 3, laser crystal 4 and reflective mirror 7, so as to be amplified in the resonator formed thereby. The amplified light pulse is extracted by applying a voltage V_P2 causing a 90-degree rotation of the polarization of the transmitted light to the Pockels cell 6 to convert the light pulse to S-polarized light which is then reflected out of the resonator by the polarizer 5.

The invention discloses a finger rehabilitation device which comprises far knuckle sleeves matched with far knuckles, middle knuckle rings matched with middle knuckles, near knuckle rings matched with near knuckles and a palm ring matched with a palm. The far knuckle sleeves, the middle knuckle rings and the near knuckle rings are hinged through hinges. The finger rehabilitation device further comprises a control panel which controls movements of the far knuckle sleeves, the middle knuckle rings and the near knuckle rings. The control panel is connected with the far knuckle sleeves, the middle knuckle rings and the near knuckle rings through flexible knuckle connectors which penetrate the palm ring. The finger rehabilitation device is flexible and controllable during operation, simple, and easy to use.

The invention discloses a novel controllable telescopic rod which structurally comprises two sections of hollow telescopic rods, a worm cam, a spherical roller rotating disc, a locking gear, a shaft, a motor, a locating screw and a locking rack switch. The two sections of hollow telescopic rods are nested with each other, the spherical roller rotating disc is arranged on one section of rod through the rotating shaft, the motor is fixed to the other section of rod through the locating screw, and an output shaft of the motor is connected with a worm cam matched with the spherical roller rotating disc. The spherical roller rotating disc is fixedly connected with the locking gear, and the locking rack switch locks the spherical roller rotating disc by being meshed with the locking gear. During internal driving, the spherical roller rotating disc is locked, and the motor drives the worm cam to rotate. During external driving, the spherical roller rotating disc freely rotates, and the worm cam and the spherical roller rotating disc achieve similar movement of the rack and the gear. The novel controllable telescopic rod smoothly extends and retracts, is flexibly and accurately controlled, can achieve switching of internal driving and external driving, and is wide in application range.

The invention discloses a rollover movement control method of a multi-joint dolphin robot. A control method and achieving steps of front rollover movements and rear rollover movements of the dolphin robot are provided by performing theoretical analysis and system research on the front rollover movements and the rear rollover movements of the dolphin robot and combining a propulsion mechanism of movements of a dolphin. Due to the fact that the front rollover movements and the rear rollover movements of the dolphin robot belong to pitching movements of the dolphin, first the pitching movements of the dolphin are analyzed and divided into a bending stage and an stretching stage, the bending stage and the stretching stage are respectively analyzed, a calculation formula of a joint turning angle and a movement path of joints during the pitching movements are provided, and movements of pitching joints of the dolphin robot are controlled. The rollover movement control method of the multi-joint dolphin robot can accurately control a pitch angle of the dolphin robot during the movements, and achieves accuracy of pitching movement control of the dolphin robot.

The invention provides a gate drive current charging circuit of a power device and a gate drive control circuit of the power device. The gate drive control circuit separates charge and discharge paths, and uses an adjustable current source to provide charging current for the power device, with more flexible and reliable control mode, which can be applicable to integrated package applications of the power device, especially for depletion-type GaN power transistors. The gate drive current charging circuit is an on-chip adjustable current source with maximum current clamp, and the generated charging current is adjusted by adjusting the voltage value of the reference voltage, the resistance value of the off-chip resistor and the number of strobe current mirror units, so as to ensure more flexible and accurate control of the charging current of the power device. A current control loop is used to realize the maximum current clamping, and a filtering structure is set to eliminate the influence of noise, so as to improve the system reliability. At the same time, when the gate voltage of the power device reaches the logic high level of the gate drive control circuit, the generation of the charging current is stopped, and no additional power consumption is generated. No series resistance is used, so that no gate parasitic inductance is introduced.

The invention discloses a variable clock DDS arbitrary waveform signal source output frequency control method and a realization device. A work clock of a signal source is arranged according to the number of original waveform periodic sampling points and output frequency. Interpolation processing is performed on original waveform data according to the work clock of the signal source so that length of the original data is adjusted. The number of the sampling points in each period is adjusted by adopting a Lagrange interpolation algorithm by aiming at defects of frequency resolution in a conventional DDWS technology so that complex and variable waveforms can be generated and the requirement for resolution can be met. The method can be widely applied to the fields of automobile anti-lock braking, engine control, frequency converters, etc.

A control system on service function of mobile terminals includes: an information read device of a mobile terminal used for reading the End-User's identification information; a site server connecting with the network of the information read device for receiving control information, an operational control server linking with the mobile communication network and the above site server for receiving and executing the order of the mobile terminal. A control method is provided including: 1. reading mobile End-User's identification information, 2. sending the corresponding control information to the site server, 3. the order of control and demand is generated and sent to the operational control server, 4. closing the operation functions of the mobile terminal, 5. the order of free control is generated and delivered to the operational control server, 6. restoring the operation functions of the mobile terminal. This invention has a flexible and accurate control of the mobile terminal operations and function in the specific field.

The present invention relates to the technical field of robots, especially to a multifunctional polling robot based on distributed control. The multifunctional polling robot based on distributed control comprises a control module, a cruise module, a motion module, an image collection module, a gas detection module, a soil sampling module, a wireless communication transmitting-receiving module andan upper computer monitoring module. The control module employs an MSP430G2553 single-chip microcomputer, the cruise module employs a RX23T5F523T5ADFM single-chip microcomputer, the RX23T5F523T5ADFM single-chip microcomputer reads image information collected by a CMOS camera in real time through an SCCB communication mode and transmits the position information to the MSP430G2553 single-chip microcomputer through a serial communication mode. An MSP430 processor is taken as a main control core, a RX23T is taken as an auxiliary control system, the distributed control reduces computing errors on data processing and increases data processing precision.

The invention belongs to the technical field of power battery management, and particularly discloses an automobile lithium battery charge balancing method and balancing system. The invention provides a method and a system for realizing balance when a battery pack is in a charge state. In the charging process, two DC (direct current) power supplies are loaded to each single battery for charge, wherein one DC power supply is an external DC power supply loaded at the two ends of the battery pack, and the other DC power supply is a compensation DC power supply loaded at the two ends of each single battery; when charging is started, all DC compensation power supplies are started at full load to output the same compensation current for compensative charge to each single battery; and in the charge process, the compensation current at the two ends of the single battery with a relatively high voltage is reduced until the battery pack reaches a balanced state so as to obtain lower energy consumption, higher efficiency and better effect when balancing difference among the single batteries.

The invention discloses six-station flexible processing equipment and a method for processing a work piece. The processing equipment comprises a turntable seat (7) which is arranged on a fixed base, a rotatable round turntable (8) which is arranged on the turntable seat, as well as a loading and unloading station (1), a face milling station (2), a drilling station (3), a heavy boring station (4), a fine boring station (5) and a tapping station (6) which are arranged around the round turntable, wherein the loading and unloading station (1) is arranged on the round turntable (8), and the face milling station (2), the drilling station (3), the heavy boring station (4), the fine boring station (5) and the tapping station (6) are arranged at the periphery of the round turntable. According to the six-station flexible processing equipment and the method for processing the work piece, multiple manufacturing procedures, such as milling, drilling, boring, chamfering and tapping, can be completed under the once clamping condition, so that the manufacturing procedures are all completed, and a finished product with high product precision and good quality stability is directly obtained. The six-station flexible processing equipment and the method for processing the work piece are particularly suitable for processing large-batch small parts, in particular connecting rod type parts.

The invention aims to provide a piezoelectric electronic-control fuel injector which comprises a fuel injector body. A boss is arranged in the fuel injector body, a hole is arranged in the middle of the boss, a piezoelectric stack, a sliding fuel drain valve and a return spring of the sliding fuel drain valve are sequentially mounted on the upper side of the boss, a control piston, a return spring of a needle valve and the needle valve are sequentially mounted on the lower side of the boss, a nozzle is mounted outside the needle valve, a needle valve cavity is formed between the needle valve and the nozzle, an injection orifice is arranged at an end of the nozzle, a control chamber is formed between the control piston and the boss, a fuel storage tank and a fuel flowing hole which are communicated with each other are arranged in the sliding fuel drain valve, the fuel flowing hole is communicated with the control chamber via the hole of the boss, and a high-pressure fuel passage and a low-pressure fuel return passage are respectively arranged on the fuel injector body. The piezoelectric electronic-control fuel injector has the advantages that the piezoelectric electronic-control fuel injector is simple in structure, the piezoelectric stack is quick in response and high in driving force, the control freedom degree of the needle valve is high, the fuel charge, the fuel injection time and a fuel injection law can be flexibly and accurately controlled, repeated injection can be implemented, and the emission performance and the fuel economy of a diesel engine can be further improved.

The invention discloses a tunnel lighting regulation and control system and method. The system comprises a plurality of sets of sensing devices, a monitoring device, a main control device and a control device. The sensing devices are matched with the monitoring device for use, so that the control device conducts bright and dark classified regulation and control on lighting lamps of different regions in a tunnel according to the actual vehicle passing information, that is, the brightness of the lighting lamps in the region where a vehicle is located and in the next adjacent region where the vehicle is going to enter is brightened, enough illumination in the running region of the vehicle is guaranteed, and the driving safety is guaranteed; meanwhile, the brightness of the lighting lamps in the regions where the vehicle has passed is darkened, so that the lighting lamps can take a rest appropriately when no vehicle passes through, long-time ongoing high-power illumination is avoided, the service life of the lighting lamps can be prolonged, the replacement frequency is reduced, and the replacement cost and maintenance time cost are saved; the operation energy consumption and maintenance cost of the tunnel are lowered in whole; the regulation and control method is easy to operate, flexible and precise to control and obvious in practical application advantage.

A method and a system for operating a working machine provided with a hydraulic system and an operator control adapted to command actuation of the hydraulic system is provided. The system includes a first control unit and a second control unit for moving an implement on the working machine and/or for steering the working machine. The method includes receiving first information regarding a status of the operator control, and determining at least one hydraulic system control information based on the first information and sending the determined hydraulic system control information to a second control unit which is adapted to control the hydraulic system accordingly.

The invention relates to the field of agriculture and aims to provide a tea single-bud picking manipulator based on soft body driving. The manipulator has the characteristics of simple structure, flexible control and high picking efficiency. According to the technical scheme, the tea single-bud picking manipulator based on soft body driving is characterized in that the manipulator comprises a rack, a clamping jaw arranged in the rack, a motor for driving the clamping claw to rotate, a pneumatic mechanism for driving the clamping jaw to be opened and closed, a sensor, a collection box and a controller; the clamping jaw comprises a rotating shaft fixed to a rotary shaft of the motor, a driving finger fixed to the rotating shaft and a driven finger rotatably positioned on the rotating shaft;the pneumatic mechanism comprises an air pump, an air bag arranged on power arms of the driving finger and the driven finger, and an air transmission pipe enabling the air pump and the air bag to communicate; and the controller is electrically connected with the motor, the air pump and the sensor.