34results about How to "Small control current" patented technology

Disclosed are a method and device for controlling the operating temperature of an optical assembly, an optical assembly and an optical network system. The method comprises: acquiring an external ambient temperature of an optical assembly; setting a target control temperature of a temperature controller according to the external ambient temperature, the target control temperature being a function value of the external ambient temperature, and the target control temperature being within a range from a lower limit of the operating temperature of a laser to an upper limit of the operating temperature of the laser; and according to the target control temperature, controlling the operating temperature of the optical assembly by means of heating or refrigeration by the temperature controller. By means of the method and device for controlling the operating temperature of an optical assembly, the optical assembly and the optical network system, the target control temperature of the temperature controller can be adjusted in real time by acquiring the external ambient temperature of the optical assembly and setting the target control temperature of the temperature controller according to the external ambient temperature, thereby reducing a control current of the temperature controller, and thus the power consumption of the temperature controller can be reduced.

The invention discloses a mixed-excitation non-contact levitation and guidance system which adopts permanent magnet and electromagnet mixed excitation, can be used for remarkably reducing the control current, is low in power consumption and can be used for non-contact guidance of a hoisting machine and an elevator. The mixed-excitation non-contact levitation and guidance system comprises a guide rail and a guide assembly, wherein the guide assembly is composed of a left yoke, a right yoke, a permanent magnet, a left coil winding, a right coil winding, a left gear and a right gear; the left yoke and the right yoke are both of C-shaped groove bodies, notches of the left yoke and the right yoke are opposite and are symmetrically formed in the left and right sides of the guide rail to form a semi-surrounding structure and form air gaps in two sides; two lower arms of the left yoke and the right yoke are connected into one body by the permanent magnet, the lower arms of the left yoke and the right yoke are symmetrically provided with a folded-line-shaped left gear and a folded-line-shaped right gear in a vertically upward direction, and are provided with coil windings correspondingly in a sheathing manner, the top end surfaces of the left gear and the right gear are parallel to the side surface of the guide rail and are provided with gear air gaps. The mixed-excitation non-contact levitation and guidance system is small in part quantity, small in occupying space and low in power consumption and can be controlled simply.

The invention provides a retarder unloading system controlled by an electric pump and an electromagnetic valve, and relates to the technical field of vehicle retarders, the retarder unloading system comprises a retarding mechanical device, an unloading valve and the electric pump; the retarding mechanical device is provided with a high-pressure cavity and a low-pressure cavity; the unloading valve is provided with a piston loading cavity, the piston loading cavity is provided with a high-pressure port, a low-pressure port and a control port, the high-pressure port is connected with the high-pressure cavity through a high-pressure branch, and the low-pressure port is connected with the low-pressure cavity; the electric pump is connected with the control port through a first pipeline, the electric pump can depressurize the piston loading cavity, in the depressurizing state, the unloading valve is in an open state, and the high-pressure port communicates with the low-pressure port. The technical problem that in the prior art, the unloading reaction speed of a retarder is relatively low is solved, the technical effects of being rapid in unloading reaction and accurate in control are achieved, and the positive displacement pump principle can be used for the retarder.

The invention discloses an electric power-assisted brake system with a large transmission ratio. The system comprises a motor, a first transmission pair, a second transmission pair, a third transmission pair and a power coupling mechanism, wherein the motor is connected with the first transmission pair and drives the first transmission pair to work, after the second transmission pair and the thirdtransmission pair are sequentially connected to the first transmission pair, the first transmission pair, the second transmission pair and the third transmission pair are driven by the motor to achieve linkage, and the power coupling mechanism is connected with the third transmission pair. The system has the advantages that the problems that due to the fact that the transmission ratio of an existing electric power-assisted brake system is low, maximum brake force is not large enough, and the current of the motor is excessively large are solved, and an effective solution is provided for intelligentization of a heavy vehicle brake system.

The invention provides a gas-driven or liquid-driven mechanical muscle group which comprises a controller (4) and two muscle rope connectors (1), wherein a plurality of parallel mechanical muscle ropes (2) are arranged between the two muscle rope connectors (1); each mechanical muscle rope (2) comprises a plurality of mechanical muscle units (3) connected in series; a first total terminal (21) and a second total terminal (22) are respectively arranged at two ends of each mechanical muscle rope (2); the first total terminals (21) are arranged in parallel in one muscle rope connector (1) and then are connected with the controller (4); and the second total terminals (22) are arranged in parallel in the other muscle rope connector (1) and then are connected with the controller (4). The mechanical muscle group provided by the invention is simple in structure, small miniaturization batch production can be realized, the cost is low, by virtue of gas or liquid characteristics, the muscle contraction and relaxation process is slow and steady, accurate and refined operation can be realized, and the gas-driven or liquid-driven mechanical muscle group is very suitable in a small microrobot field.

The invention discloses a light emitting diode (LED) display panel and a control method thereof. The LED display panel is composed of a great deal of pixel. Each pixel comprises a LED, a display capacitance, a diode, a first electrode, a second electrode and a third electrode. In the control method of the LED display panel, by means of charging the capacitance arranged inside each pixel, the LED in series then can be used for forming capacitance discharging current to enable the LED to give out light. A suitable capacitance value can be chosen to enhance the working voltage of a control circuit, lower control current and reduce line loss caused by large current control and the pressure of control source.

The invention discloses an ultrasonic knife self-adaptive control method and system for finishing tissue shearing. The ultrasonic knife self-adaptive control method comprises the steps that real-time working frequency value data of an ultrasonic knife is obtained to form a frequency change curve; function operation is carried out according to the obtained frequency value data to obtain a frequency change characteristic value; according to the frequency change characteristic value, the process of each stage of the ultrasonic knife is judged; and it is judged that the ultrasonic knife reaches a tissue shearing end point, and the control current of the ultrasonic knife is reduced at the time point and a shearing end prompt is generated. The ultrasonic knife self-adaptive control method has the beneficial effects that the tissue shearing end point is automatically judged according to the remarkable characteristics of the frequency, when the tissue shearing end point is reached, a doctor is reminded to end shearing, so that the operation pressure of the doctor is reduced, the control current of the ultrasonic knife is reduced, the knife is protected while the optimal operation effect is achieved, the knife abrasion is reduced, and the service life of the knife is prolonged.