887results about How to "Fast braking" patented technology

A system and method for controlling the state of charge of an energy storage system examines a number of parameters to determine if a target state of charge should be adjusted. Parameters related to one or more of: a target life span of the energy storage system, driving habits of a vehicle operator, or environmental conditions are examined. The target state of charge is changed from a predetermined baseline target state of charge when the parameter values meet predetermined conditions.

The invention relates to an unmanned aerial vehicle type automatic sampling system at fixed points of the water surface. The unmanned aerial vehicle type automatic sampling system comprises a water sampler, a lifting mechanism and a control circuit, wherein the water sampler comprises a barrel body and a periphery component, a large conical horn mouth is designed at the lower end of the barrel body, and an end cover exhaust device is arranged at the upper end of the barrel body; a buoyancy ring and a heavy ring are arranged at the outer side of the barrel body, the buoyancy ring is arranged at the lower end of an end cover, and the heavy ring is arranged at the lower end of the buoyancy ring; and a valve cover is arranged at the bottom of the inner side of the barrel body; the integrity is connected by a flying ring, the lifting mechanism is connected at the upper part of the flying ring, and is controlled by the control circuit. The lifting mechanism adopts a winding and distributing mechanism, the winding mechanism is composed of a power motor, a worm-gear speed reducer and a speed ratio guide wire wheel set, the speed ratio guide wire wheel set is connected with the flying ring by a connecting wire, the speed ratio guide wire wheel set is connected with the worm-gear speed reducer which is connected with the power motor; while the twisting force is increased, self locking can be achieved; and the system adopts the unmanned aerial vehicle system to realize sampling, the traditional manual sampling mode can be replaced completely, and rapid, intelligent and high-efficiency water sampling can be achieved.

The invention relates to a steering early warning auxiliary device for a heavy truck, which includes an in-vehicle early warning component and an external early warning component. The device and the obstacle dynamic prediction module installed on the inner bracket of the instrument panel; the early warning components outside the vehicle include radar detection components and high-definition camera components, and the radar detection components and high-definition camera components are arranged in pairs on the vehicle body corresponding to the blind spot of the truck on the corresponding position. Due to the existence of the obstacle dynamic prediction module and the alarm indicating device, the device can firstly predict the trajectory of the truck and possible dangers, thereby reminding the driver. During the operation of the driver, the device can make accurate and fast judgments again. , In an emergency, the vehicle can be stopped quickly to avoid dangerous situations. The device can be used as a steering warning auxiliary device for heavy trucks, and its use is safe and reliable.

The invention relate to a device and a method for controlling a single-bus modular digital actuator of a robot. The device comprises an actuator control unit, a direct-current motor, a communication module, a speed reduction mechanism, position and temperature sensors and a current protection circuit. The method includes that the actuator control unit computes control parameters according to the running temperatures, driving currents of the motor and the position of the actuator and outputs the control parameters to a motor control circuit; the communication module receives control instructions of an upper computer and feeds information of the current position of the actuator, the current speed of the actuator and the like to the upper computer; a high rotational speed and low torque of the motor are converted into a low rotational speed and high torque by the speed reduction mechanism and an output mechanism, and the low rotational speed and the high torque are outputted by the speed reduction mechanism and the output mechanism; the position sensor, the temperature sensor and the current protection circuit are respectively used for feeding current position signals of the actuator, the running temperatures and the driving currents of the motor to the actuator control unit, so that closed-loop high-precision safety control can be implemented. The device and the method have the advantages of overcurrent, overvoltage and over-temperature protection, capability of preventing overload or over-temperature damage, high response speed, zero dead zones and high control precision.

The invention discloses a variable speed drive shield disc cutter energy saving hydraulic control system, which comprises a main hydraulic circuit consisting of a variable speed motor, a two-way hydraulic pump, a one-way valve, a hydraulic motor, a hydraulic lock and a change valve; and a feed circuit. The output rotation speed of an asynchronous motor driving the two-way hydraulic pump is variable speed controlled. The output signal of a rotary speed controller is adjusted in real time according to the rotation speed required to cut earth by a disc cutter to change the rotation speed of the asynchronous motor, thus controlling the output flow of the two-way hydraulic pump and driving the hydraulic motor to output the moment and the rotation speed that the disc cutter requires to overcome the load. The main hydraulic circuit adopts a closed type hydraulic circuit, and directly feeds the oil of the oil discharge outlet of the hydraulic motor into the inlet port of the motor through the two-way hydraulic pump, thus reducing the volume of a hydraulic system pumping station. Two stages of high and low working pressure are provided so that the shield disc cutter can work on two different geological conditions of soft ground and hard rock. By adopting variable speed control, the output flow of the hydraulic pump is matched with the load power of the disc cutter, thus significantly saving the energy.

The invention discloses a touch sense vibration control system and a method of an intelligent terminal. The system comprises a command generator, a filter, a touch sense driver and a linear resonance actuator. The command generator generates an initial command signal according to an input signal. The filter filters the initial command signal so as to allow the amplitude of a predetermined number of initial pulse of the filtered command signal to be greater than a set threshold and phase positions of a predetermined number of pulse at the end to be reversed; and the touch sense driver generates a driving signal for driving the actuator to vibrate according to the filtered command signal. According to the invention, the filter carries out filtering processing on the initial command signal generated by the command generator, so when follow-up generated driving signals are used for driving the actuator to vibrate, the actuator can rapidly make moving responses and braking responses. Thus, overlapping degree of front and back vibration events at a quite short interval in the time dimension is weakened; the degree of distinction of the front and back vibration events in the time dimension is increased; and expected vibration effects are ensured.

The invention discloses a tactile vibration control system and method for an intelligent terminal. The system comprises a command generator, a touch driver, a linear resonance actuator, a sensing module, a feedback unit and a comparator, the state of the actuator is monitored or sensed through the sensing module which includes a plurality of sensors, and multiple paths of sensor signals are generated when the actuator vibrates; the feedback unit sends sensing signals output by the plurality of sensors and representing related physical quantities of a vibration mode as feedback signals to the comparator; and the comparator generates an error signal according to the feedback signals and a desired signal in an input signal and sends the error signal to the command generator, so that the command generator adjusts a generated original command signal according to the error signal, thereby completing closed-loop control of the linear resonance actuator. The tactile vibration control system provided by the invention can estimate the state of the actuator robustly and apply control, avoids the residual phenomenon of trailing when the linear resonance actuator vibrates, and achieves the technical effect of adjusting the vibration state of the actuator in real time.

A safety system for a rotary saw or other dangerous machine tools features a flesh-sensing circuit (14, 19), located on a safety guard (16) surrounding a dangerous machine part, which generates an electronic signal to trigger emergency stopping of the machine before the operator can contact the dangerous machine part. The stopping means preferably employs DC injection, winding current direction reversal and/or electromagnetic motor braking, in the event of detection of operator contact with the safety guarding device. The system is adapted to be used both with newly-manufactured machine tools and by retrofitting onto previously-manufactured machine tools, by in-the-field modifications.

The invention relates to an electromagnetic train. The electromagnetic train comprises a line rail, a driving system, a train body, a guiding system and an electromagnetic supporting system. A plurality of long stators are mounted on two sides of the line rail along a driving direction; the driving system comprises the long stators, and the train body comprises train body supporting racks and compartments; the guiding system comprises guiding magnets, guiding rails, guiding air gap sensors and guiding controllers; the electromagnetic supporting system comprises rotors, rotor controllers and train body load sensors, wherein the rotors are located below the long stators, and a small air gap is formed between each rotor and the corresponding long stator and ranges from 2 mm to 6 mm; and the rotor controllers adjust the exciting currents of the rotors in real time, so that the electromagnetic forces generated by the rotors are equal to the train body load. The train body is in contact with the line rail through a supporting skid at the bottom of the train body. According to the electromagnetic train provided by the invention, the air gap sensors are not needed to be suspended, so that the electromagnetic train is small in power consumption, light in self weight, low in cost and simple to control and runs stably.

The invention relates to a spinning process of bamboo-like flat filaments produced by a semi-continuous high-speed spinning machine and belongs to the technical field of spinning of semi-continuous spinning machines. The spinning process comprises glue supply, filament strip forming, spinning and winding. The spinning process is characterized in that the glue supply is achieved through a glue supply device which comprises a metering pump, a glue supply tube and a filter; the metering pump is connected with a frequency converter which is used for controlling the amount of the glue supply of the metering pump; the frequency converter controls the metering pump to perform intermittent glue supply; the spinning is achieved through a spinning device which comprises at least one spinning roller which is horizontally arranged relative to an operating surface of a spinning surface; and filament strips surround the spinning roller to achieve drafting, solidification and deacidification in the spinning processes under the rotation of the spinning roller. The spinning process of the bamboo-like flat filaments produced by the semi-continuous high-speed spinning machine has the advantages of solving the problems that the filament strips of the semi-continuous spinning machines are inadequate in response, so that the spinning speed cannot be improved and the production efficiency and product quality cannot be integrated, enabling the arrangement direction of the spinning roller to be changed to enable the spinning speed of the spinning machine to be improved and enabling the high quality bamboo-like flat filaments to be spun out.

The present invention relates to a method for monitoring a braking power of a vehicle by using an adaptable theoretical model which generates a theoretical behaviour of the vehicle from operating data of the vehicle, containing the following steps: a) determination of a real behaviour of the vehicle from acceleration or deceleration of the vehicle, b) comparison of the real behaviour of the vehicle with the theoretical behavior of the vehicle, and c1) monitoring of the system parameter by the theoretical model if the theoretical behaviour of the vehicle corresponds to the real behaviour of the vehicle, and c2) if the braking power exceeds or undershoots a predefined limiting value or lies within a predefined limiting value range, generation of a fault message for a vehicle driver, or c3) adaptation of the theoretical model until the theoretical behaviour of the vehicle corresponds to the behaviour of the real vehicle and continuation with step c2) if the theoretical behavirour of the vehicle does not correspond to the behaviour of the real vehicle, and c4) if a deviation between the braking power which is identified with the original theoretical model and the braking power which is identified with the adapted theoretical model does not exceed or undershoot the predefined limiting value and lies within a predefined limiting value range, controlling of the braking power according to the adaptable theoretical model in step c2) or c5) generation of the fault message relating to the presence of a fault at the vehicle and/or in the theoretical model if the deviation between the braking power which is identified with the original theoretical model and the braking power system which is identified with the adapted theoretical model exceeds or undershoots the predefined limiting value and/or lies outside the predefined limiting value range.

The invention discloses an air conditioner and a shutdown control method and device for a compressor of the air conditioner. The method includes the steps that when stop signals of the compressor are received, upper-arm power switch tubes of all bridge arm bodies in a three-phase arm are controlled to be turned off, and lower-arm power switch tubes of all the bridge arm bodies are controlled to be turned on or turned off at the same time through PWM signals or the lower-arm power switch tubes of all the bridge arm bodies are controlled to be turned off, and the upper-arm power switch tubes of all the bridge arm bodies are controlled to be turned on or turned off at the same time through the PWM signals to control a three-phase winding of the compressor to be subjected to a short circuit; the peak value of a three-phase current of the compressor is obtained; the duty ratio of the PWM signals is adjusted according to the peak value of the three-phase current and the limiting threshold value of a phase current of the compressor to adjust a braking current generated when the three-phase winding is subjected to the short circuit; braking torque is generated according to the braking current to control a rotor of the compressor to be braked, and the compressor stops operating accordingly. By means of the method, rapid braking and fixing of the compressor can be achieved, stress of a distributing tube in the air conditioner can be reduced, and the service life of the distributing tube in the air conditioner is prolonged.

A chainsaw having a brake arrangement comprising: a kickback brake drum (10) arranged to rotate together with a drive sprocket driving a saw chain of a chainsaw, a kickback brake for quickly stopping the saw chain if at least one kickback actuator (7) is actuated, the kick back brake including a kickback brake band (11) extending around the kickback brake drum (10) and means for tightening the kickback brake band (17-19, 22) around the kickback brake drum (10), and; a coasting brake weaker than the kickback brake being arranged to brake the saw chain (2) unless a coasting actuator of the chainsaw is actuated, the coasting brake includes a coasting brake band extending around a coasting brake drum (10) arranged to rotate together with the drive sprocket (37), and means for tightening the coasting brake band (20, 22, 23) around the coasting brake drum, wherein the coasting brake band is either at least one longitudinally slit portion (11b) of the kickback brake band or a separate brake band.

The invention belongs to a two-dimensional measuring technique of the quality of a cold neutron beam and particularly relates to a multipurpose fight time device of quality measurement of the cold neutron beam. The structure of multipurpose fight time device of the quality measurement of the cold neutron beam comprises a first slit device for passing the cold neutron beam. The rear side of the first slit device is provided with a mechanical chopper which is connected with an inlet end of a neutron flight tube, wherein the neutron flight tube is parallelly arranged. An outlet end of the neutron flight tube is connected with a second slit device. The rear side of the second slit device is provided with a detector and a shield device. The detector is connected with a computer through a multichannel time analyzer. The multipurpose fight time device of the quality measurement of the cold neutron beam is ingenious in structure, low in hardware cost and easier and more stable in the whole system and can achieve high precision of corner positioning and quick starting and braking. In the meantime, specific designing conditions of a transmission system of the cold neutron beam can be considered, so needs of beam energy spectrum and quality parameter measurement required by each cold neutron spectrometer can be fully met.

The invention discloses an aluminum alloy section for an automobile bumper. The aluminum alloy section comprises the following elements in percentage by mass: 6.0-6.5% of Zn, 0.8-1.0% of Mg, 0.2-0.3% of Mn, 0.1-0.2% of Cu, 0.2-0.3% of Ti and the balance of Al and inevitable impure elements; a preparation method of the aluminum alloy section comprises the following steps: (1) smelting, (2) refining, (3) casting, (4) homogenizing and extruding, and (5) quenching and aging, so as to obtain an aluminum alloy section finished product. The aluminum alloy section prepared by the invention is good in thermal deformation and machinability and excellent in corrosion resistance and welding property, and the produced automobile bumper is light in weight and can better absorb collision impact energy; the aluminum alloy section achieves various technical indexes of the automobile bumper speculated by the nation in performance, and further meets the development tendency of light weight of modern automobiles.

The invention discloses a three-phase power supply default phase and power failure detection system and a braking method. The detection system comprises a three-phase power supply RST, a rectification circuit, a relay circuit, an IPM circuit, two optocoupler processing circuits, a DSP processor, a braking circuit, a Nixie tube and a servo motor and is applicable to a motor control system of a servo driver. The braking method comprises the following steps: judging abnormal conditions such as default phase and power failure of the three-phase power supply, then closing a PWM signal by the DSP processor, cutting off a busbar power supply by virtue of the relay circuit, starting and accessing the braking circuit, connecting a braking power resistor among three-phase windings of the servo motor in series for realizing short connection of the three-phase windings, and generating current in a short connection loop by virtue of residual magnetism potential of a stator winding, so that the motor is rapidly braked. The detection system and the braking method, which are disclosed by the invention, have the advantages that security protection effect on electrical equipment and personnel is realized, implementation is easy, cost is low, and the problems that a motor in existing electrical equipment adopts a band-type brake module, price is high, size is large and control and wiring are complex can be solved, so that the detection system and the braking method have a good application prospect.

In a motor vehicle, in particular a utility vehicle, having a shifting claw transmission and an electric motor connected to a countershaft of the transmission to facilitate central synchronization for gear speed changes, a transmission controller is connected to the electric motor for sensing the electric motor speed and, together therewith the rotational speed of the countershaft based on the induction values present in at the electric motor and sensed by the transmission controller for use in adjusting the energization of the electric motor.

An electronic brake system for a trailer with a pneumatic brake installation is disclosed. The electronic brake system comprises a brake controller (18) in the trailer (11) connected to a first communication device (20) that is part of a first communication channel (23) for wirelessly receiving brake signals of a towing vehicle (10). The electronic brake system also comprises a second communication channel for receiving brake signals of the towing vehicle. The brake controller (18) converts the brake signals of the first communication channel (23) into brake commands for the pneumatic brake installation only if brake signals arrive via the second communication channel (24) at the same time or within a defined time window. The time window begins as soon as a brake signal arrives on one of the first and second communication channels (23, 24).

The invention provides a method and system for controlling the switching-on threshold value and the switching-off threshold value of a brake vacuum pump. The method comprises an information acquiring step and a threshold value setting step. According to the information acquiring step, at least the current vehicle speed information and brake information are acquired. According to the threshold setting step, the switching-on threshold value and the switching-off threshold value of the vacuum pump are set respectively at least according to the speed of a vehicle and the magnitude of brake signals through the current vehicle speed information and the brake information, and the working time of the vacuum pump is reduced under the premise that the braking safety is guaranteed. According to the method and system, the switching-on threshold value and the switching-off threshold value of the vacuum pump can be set according to the current vehicle speed information and the brake information, so that the various working conditions of the vehicle in the traveling process are fully considered; under the premise that the brake safety is absolutely guaranteed, the working time of the vacuum pump can be reduced to the greatest extent, the probability of breakdowns due to long-time working of the vacuum pump is lowered, and the service life of the vacuum pump is effectively prolonged.

The invention belongs to the field of rigid mining dump trucks, and particularly relates to a braking device of a heavy-duty mining dump truck. The braking device comprises an oil tank, a brake pump, a braking multiple-unit valve, a pedal braking valve and a front brake, an oil suction port of the brake pump is connected with the oil tank, an oil outlet of the brake pump is connected with the braking multiple-unit valve via a filter, the braking multiple-unit valve is respectively connected with a parking braking valve and the pedal braking valve, the pedal braking valve is respectively connected with the front brake and the parking braking valve, and the parking braking valve is respectively connected with a rear brake and a parking brake. Since the braking multiple-unit valve, the parking braking valve and a loading braking valve are arranged to enable the braking device of the heavy-duty mining dump truck to realize functions of driving brake, parking brake, loading brake, emergency brake and automatic brake, safety and reliability of the truck are effectively improved.