13results about How to "Simple and reliable control process" patented technology

The utility model discloses a test tube rotating mechanism and a test tube code scanning device, and relates to the technical field of medical detection equipment. The pressing wheel assembly comprises a support and a swing part, the support is slidably connected to the fixing frame, the swing part is arranged on the support, and the support is provided with a clamping part; the rotating assembly comprises a rotating wheel, a follower is arranged at the top of the rotating wheel and connected with the swing part, the rotating wheel rotates to enable the follower to drive the swing part to move, so that the clamping part abuts against and is tangent to the outer wall of the test tube, the outer side wall of the rotating wheel is used for abutting against and being tangent to the outer wall of the test tube, and the rotating wheel and the clamping part are matched to clamp the test tube; the rotating wheel rotates to rub the test tube and drives the test tube to rotate under the action of friction force, and the test tube rotates to drive the clamping part to rotate under the action of friction force; the driving assembly is in driving connection with the rotating wheel and drives the rotating wheel to rotate; the test tube rotating mechanism provided by the utility model is simple in structure and simple and reliable to control.

The embodiment of the present invention provides an electric vehicle thermal management system and an electric vehicle, and relates to the field of thermal management systems. The electric vehicle thermal management system includes a cooling and heating module, an HVAC module, a front-end module, a power battery, a first water pump, a second water pump, a third water pump, a first switch water valve, a second switch water valve, a third switch water valve, a first proportional water valve, an electronic drive unit, an expansion kettle, and a second proportional water valve. The refrigerant circuit can be in a variety of states of heating, cooling, and dehumidifying the passenger compartment without changing the flow direction of the refrigerant, reducing the number of components of the refrigerant circuit, and the system control is simpler and more reliable. The electric vehicle includes the above-mentioned electric vehicle thermal management system, thereby reducing the number of components of the refrigerant circuit, and the system control is simpler and more reliable.

The present invention relates to a vibration device and method for a vibrating sample magnetometer, in which a linear voice coil motor is arranged in cooperation with a grating ruler; the signal output end of the grating ruler is connected to a microcontroller; the input end of a displacement signal source is electrically connected to the microcontroller; the input end of an AC signal source is electrically connected to the microcontroller; the output end of the AC signal source and the output end of the displacement signal source are both electrically connected to the input end of a differential amplifier; the input end of a DC signal source is electrically connected to the microcontroller, the output end of the DC signal source and the output end of the differential amplifier are both electrically connected to the input end of an adder, and the output end of the adder is electrically connected to the linear voice coil motor through a current source. The present invention uses a linear voice coil motor as a vibration source, and uses a closed-loop control combining digital and analog, so that the vibration frequency and amplitude are stable, and at the same time has small mass, large load capacity, simple and reliable control circuit, and technical indicators reach the level of foreign commercial instruments, which can replace imports.

The invention relates to the technical field of fuel cells, and provides a fuel cell system starting circuit and method and a controller, the circuit comprises a controller, a boost DC / DC converter, an output bus capacitor, a main pre-charging circuit and an auxiliary pre-charging circuit, the output end of the boost DC / DC converter is connected with the power battery through the output bus capacitor and the main pre-charging circuit; the BOP equipment is connected with the power battery through the auxiliary pre-charging circuit; the controller is used for carrying out independent pre-charging and power supply management on the output bus capacitor of the boost DC / DC converter and the BOP device, and the bus voltage of the output bus capacitor after pre-charging is finished is the voltage of the power battery. According to the invention, effective control of the voltage and current of the electric pile in the starting process of the fuel cell system can be realized, power devices additionally required by the buck-boost topology are saved, the equipment cost, the equipment volume and the equipment weight are reduced, and the efficiency is improved.

The present invention discloses an AGV synchronous steering chassis structure, including a bottom plate, a rubber wheel driving mechanism arranged on the bottom plate, and a chain drive steering mechanism, wherein the rubber wheel driving mechanism includes four rotating platforms fixed on the bottom plate, and motor drive wheel mechanisms respectively arranged on each rotating platform; the chain drive steering mechanism includes two chains, two chain driving mechanisms fixed on the bottom plate, and each chain is simultaneously engaged with the corresponding chain driving mechanism and a pair of rotating platforms located on the same side. The present invention can realize the synchronous and same-direction rotation of two wheels on the same axis through the motor-controlled chain drive, thereby realizing the independent steering of the front and rear wheels of the AGV four-wheel chassis, with a simple structure, simple and reliable control, and can realize the rotation of the AGV in situ, which is economical and practical, and has good steering flexibility and high reliability.

The application discloses a brake gear control method and device of a hydraulic transmission, and belongs to the technical field of hydraulic transmission. The hydraulic transmission comprises an input shaft, an output shaft, four planetary rows and a plurality of brakes. The control method comprises the following steps: in response to a brake gear instruction, the second brake and the third brake are controlled to be combined at the same time; under the brake gear, the sun gear, the planet carrier and the ring gear of the second planetary row and the third planetary row are locked, and then the sun gear, the planet carrier and the ring gear of the fourth planetary row are locked through mechanical connection, so as to lock the output shaft; at the same time, the sun gear, the planet carrier and the ring gear of the first planetary row are in a freely rotatable state, so as to allow the power from the input shaft to idle in the first planetary row. Through specific brake combination control, the application can rigidly lock the output shaft under the engine idle speed state, and fundamentally solves the safety hidden trouble and operation difficulty problem caused by the no-load gear phenomenon in the prior art.

The invention provides a control method of a water chilling unit. The water chilling unit comprises a condenser, an evaporator, a compressor, a motor and a motor cooling control valve. The motor is configured to drive the compressor, and the motor cooling control valve is configured to control an amount of fluid provided from the condenser to the motor for cooling the motor. The control method comprises the steps that operation of the water chilling unit is controlled with the liquid level of the condenser and / or the evaporator as a control target; obtaining the temperature of the motor and the opening degree of a motor cooling control valve; and when the temperature of the motor reaches or exceeds the temperature threshold value and the motor cooling control valve is completely opened, the operation of the water chilling unit is controlled by taking the temperature of the motor as the control target. The control method can be realized only by adopting the existing design of the unit without adding extra components, so that the cost is not increased, and the operation failure rate of the unit is reduced; moreover, the temperature of the motor can be accurately controlled, a large amount of test data is not needed, the control is simple and reliable, and the operation efficiency of the unit is improved to the greatest extent.

This invention relates to a flexible rod-type magnetic wheel adsorption robot for internal inspection of valves and containers. It solves the technical problems of existing rigid robots based on pipe wall structures used for pipeline inspection, which have low degrees of freedom, difficulty adapting to pipes of different diameters, and difficulty navigating two consecutive bends inside flange gate valves. The robot includes forelimbs, a torso, and hindlimbs. The torso includes a flexible rod, an upper pull wire, a lower pull wire, a left pull wire, a right pull wire, and multiple joints. Each joint includes a joint drive device, a left magnetic wheel, and a right magnetic wheel. A main shaft motor in the forelimb drives each joint through the flexible rod. The upper and lower pull wires pass through each joint, with their front ends connected to the forward pitch winding wheel of the forelimb and their rear ends connected to the backward pitch winding wheel of the hindlimb. The left and right pull wires pass through each joint, with their rear ends connected to the deflection winding wheel in the hindlimb. This invention is widely used for the inspection of flange gate valves and pipelines.

The application discloses an elevator power-off emergency rescue device, method and elevator. The device comprises a control module, a storage battery, a voltage boosting module, an auxiliary source module and a relay module. The auxiliary source module is connected with commercial power and connected with the control module through the relay module. The control module is used for adjusting the state of the relay in the relay module according to the state of the commercial power, and determining whether to connect the commercial power to the elevator control cabinet or connect the storage battery and the voltage boosting module to the elevator control cabinet. The storage battery is connected with a frequency converter of the elevator control cabinet through the relay module. The storage battery is connected with the voltage boosting module. The voltage boosting module is connected with an integrated power source of the elevator control cabinet through the relay module. The application is beneficial to reducing the complexity of the emergency rescue equipment and improving the working reliability. The application can be widely applied in the elevator control technical field.

The civil air defense basement structure comprises an underground closed channel and a basement communicated with the underground closed channel, and a first ventilation system, a second ventilation system, an air detection system and an emergency alarm system are arranged in the basement; the first ventilation system supplies air in the air shaft into the basement in non-wartime; the second ventilation system is used for filtering air in the air shaft and supplying the filtered air into the basement in wartime; the air detection system is used for detecting air quality and smoke amount in the basement; the emergency alarm system is arranged in the emergency danger avoiding room and comprises a standby power supply, a manpower power generation module, an alarm and a communication module, and the alarm and the communication module are used for sending alarm information to the outside. According to the structure, sufficient clean air can be provided during wartime or non-wartime, the safety of personnel in the structure is guaranteed, the smoke dust condition of a basement can be detected, the fire alarm and fire extinguishing capacity is achieved, emergency danger avoiding measures are further provided, and the high protection capacity is achieved.

The utility model belongs to the technical field of communication module verification and testing, and provides a general tray of a communication module verification conveying line and an appearance detection device, the general tray comprises a base, a plurality of first accommodating grooves and a plurality of second accommodating grooves, and the plurality of first accommodating grooves and the plurality of second accommodating grooves are arranged on the base; the plurality of first accommodating grooves and the plurality of second accommodating grooves are in one-to-one correspondence, and the second accommodating grooves are positioned on one sides of the second accommodating grooves; the first containing groove is used for storing a communication module, and the second containing groove is used for storing a reflector. Information on the upper surface and the side face of the communication module can be conveniently photographed and recognized, so that the structure of the appearance special machine is simplified, and the appearance detection efficiency of the communication module is improved.

The utility model discloses a control circuit for reducing standby power consumption of a resonance circuit and a power factor correction circuit and a liquid crystal display television. The control circuit comprises an LLC resonance circuit, a first integrated circuit and a second integrated circuit, the LLC resonant circuit is connected with a seventh pin of the first integrated circuit through a second capacitor, a fourth capacitor is arranged between a sixth pin and a twelfth pin of the first integrated circuit, and a third pin of the first integrated circuit is connected with the second integrated circuit through a third field effect transistor; the circuit is simple in structure, low in cost and high in practicability.

The utility model discloses an operation type flying mechanical arm auxiliary undercarriage which comprises a six-degree-of-freedom mechanical arm, the six-degree-of-freedom mechanical arm comprises a first mechanical arm shaft and a small mechanical arm, the lower portion of the first mechanical arm shaft is of a fixed supporting structure, and the lower portion of the small mechanical arm is of a plane structure. A force sensor is mounted in the small arm of the mechanical arm; the adjustable rear support comprises a ball screw module, a sliding block module, rear supports and a driving motor, the rear supports are installed at the two ends of the sliding block module, and the sliding block module is driven by the driving motor and the ball screw module. According to the operation type flying mechanical arm, the periphery of the mechanical arm is not shielded during aerial operation, horizontal 360-degree omni-directional operation of the mechanical arm can be achieved, and the operation range and efficiency of the operation type flying mechanical arm are greatly improved; by changing the longitudinal position of the rear support, the stress conditions of the aircraft and the undercarriage under different working conditions are adjusted and improved.