53results about How to "Avoid undervoltage" patented technology

The invention relates to a narrow amplitude satellite type flexographic plate printing machine which is characterized in that linear guide rails are adopted for ink transfer motion of an anilox roller and movement of a printing plate roller drum, the operation is lightweight and the printing precision is high; by setting an operation mechanism which can read data of a dial indicator for indicating the position of the printing plate roller drum, the technical difficulty in operation is reduced; the anilox roller is connected with a motor through a clutch, thereby avoiding the frequent cleaning problem in a workshop of the anilox roller; by using a back bucket type double-doctor ink supply device, the structure of an ink supply mechanism is greatly simplified, and the cost is greatly reduced; a central stamping roller drum is equipped with a water circulation cooling constant temperature system, thereby ensuring the printing quality; an ultraviolet drying device is provided with a power conversion energy-saving control circuit, thereby saving electrical energy; and an infrared drying device, a printing film covering device and a printing synchronous circular die-cutting device are arranged on the back side of the ultraviolet drying device after the last color of a printing group, thereby further saving the electrical energy, realizing synchronous multiple functions in one machine and reducing the cost. The narrow amplitude satellite type flexographic plate printing machine is applicable to water-based ink printing, and can avoid polluting commodities and causing harm to health of people, and is environment-friendly.

The invention relates to a medium-sized pure electric bus chassis which comprises a chassis body, a first front wheel, a second front wheel, a first rear wheel, a second rear wheel, a front axle and a rear axle, wherein the first front wheel, the second front wheel, the first rear wheel, the second rear wheel, the front axle and the rear axle are arranged on the chassis body, the front axle is arranged between the first front wheel and the second front wheel, and the rear axle is arranged between the first rear wheel and the second rear wheel. An electric steering system, a power source system, a driving system, a control system and a brake system are arranged on the chassis body. The electric steering system is positioned in the front section of the chassis body, the power source system is positioned in the middle section of the chassis body, the driving system and the control system are positioned in the rear section of the chassis body, and the brake system is distributed on the whole chassis body in a penetrating manner. Electric energy serves as a power source, the power performance and safety of a power system can be ensured when a bus runs, and zero emission, energy conservation and environmental protection can be realized.

The invention discloses a real-time asphalt road compactness monitoring method which comprises the steps of (1) establishing a linear relation between compactness and detection density of a non-nuclear density gauge; (2) establishing a linear relation between a compaction value and the compactness; (3) according to the lower compactness limit requirement of a construction site and according to the linear relation between the compaction value and the compactness, established in the step (2), determining the lower limit of the compaction value; (4) monitoring the compactness in construction in real time, enabling an vibratory roller operator to control a vibratory roller through observing the compacted or uncompacted information displayed on an industrial control computer, continuously rolling when in uncompaction, and stopping rolling when in compaction. The real-time asphalt road compactness monitoring method is novel and reasonable in design, convenient to realize, capable of improving the compaction quality and efficiency of an asphalt road and avoiding damage to the road, relatively high in compactness detection accuracy, low in realization cost, strong in practicability, and high in popularization and application values.

The invention discloses a method, a device and a system for estimating the peak power of a battery pack. The method comprises the following steps of obtaining a discharge power limit value and a charging power limit value of the battery pack according to the charged state of the batteries in the battery pack and the temperature of the battery pack; acquiring the minimum voltage value and the maximum voltage value of the batteries in the battery pack, and determining the discharge peak power limit coefficient and the charging peak power limit coefficient based on the preset voltage limit condition, the minimum voltage value and the maximum voltage value; and calculating the discharge peak power of the battery pack and the charging peak power of the battery pack based on the discharge power limit value, the charging power limit value, the discharge peak power limit coefficient and the charging peak power limit coefficient. According to the method of estimating the peak power of the battery pack provided by the embodiment of the present invention, it is possible to adjust the peak power of the batteries in the battery pack by the battery voltage so as to avoid the risk of undervoltage or overvoltage during discharge or charging of the peak power.

The invention relates to a rolling construction monitoring system and a rolling construction monitoring method. Construction sections are divided in a construction area according to a design requirement, at least one construction section is set according to the design requirement, at least one construction roller is configured in each construction section, an RTK base station and a construction data processing mechanism are arranged in the construction area, a vehicle GPS mobile station is arranged on each construction roller, the RTK base station, the vehicle GPS mobile station and a GNSS satellite form a positioning system, and the rolling construction monitoring system is formed by the positioning system, the construction rollers, vehicle displays, vehicle controllers, the construction data processing mechanism, operation monitoring clients, and rolling degree detectors. According to the system and the method, the structure is simple, the design is scientific, the usage is convenient, the cost is low, the grasp is easy, monitoring data is accurate, the transmission is fast, the usage of equipment is long and durable, continuous, real-time and accurate rolling construction monitoring and rolling degree detection can be performed, and comprehensive control of the rolling process and the rolling quality is achieved.

The invention relates to a hybrid power automobile, a battery electric quantity balance control method and a control system. During the operation of the hybrid power vehicle, when the battery electricquantity is reduced to a low set threshold value, the power generation power of a generator is increased, as the output power of a driving motor is kept unchanged or only floats in a small range, then the power generation power of the generator and the output power of the driving motor have a certain difference, and thus the electric quantity is saved, and the electric quantity is used for recharging the battery; and when the electric quantity of the battery increases to a high set threshold value, the power generation power of the generator is controlled to be switched to the value before the increase, and thus the consistency of input and output is realized, and the electric quantity of the battery is ensured to be stable in a balanced state. Therefore, the power generation quantity ofthe generator and the power consumption of the driving motor are dynamically coordinated and controlled, so that the electric quantity balance under multiple working conditions can be realized, the situations that the electric quantity cannot be balanced such as under-voltage and over-voltage of the battery are avoided, and the service life of the battery is prolonged.

The invention provides a power supply port protective circuit. The power supply port protective circuit comprises a first low-loss power device, a second low-loss power device, a reverse-connection protective circuit, an undervoltage protective circuit, an overvoltage protective circuit and an overcurrent protective circuit, wherein the first end of the first low-loss power device is connected with a power supply input end while the second end of the first low-loss power device is connected with the first end of the second low-loss power device; the second end of the second low-loss power device is connected with the input end of a to-be-protected power supply port; the reverse-connection protective circuit is connected with the third end of the first low-loss power device and the power supply input end separately; and the undervoltage protective circuit, the overvoltage protective circuit and the overcurrent protective circuit are all connected with the second end of the first low-loss power device, the second end of the second low-loss power device and the third end of the second low-loss power device separately. By adoption of the abovementioned way, conditions of reverse connection, overvoltage, undervoltage and overcurrent and the like of the power supply port can be avoided, thereby improving operational reliability of the system.

A dormancy control circuit for an automobile and its power supply system, comprising a starting power supply, a BMS host and at least one BMS slave, a CAN bus, at least one power supply voltage detection unit, and at least one slave power management unit; the slave power management unit is connected to Between the corresponding BMS slave and the starting power supply; wherein, the BMS host enters the starting state and the dormant state according to the starting signal and the stop signal of the car, and controls the power supply and power-off of the CAN bus; the slave The machine power management unit controls the power-on or power-off of the BMS slave machine connected to it according to the power supply voltage of the CAN bus. According to the start and stop status of the car, the BMS host controls the power supply of all BMS slaves to ensure that all slave modules are powered off and dormant when the car is not in use. Once the car is started, the host will wake up all slave modules normally. Work, greatly reducing the power consumption of the system, avoiding undervoltage or insufficient capacity of the starting power supply.

The invention discloses an electronic shift lever circuit of a manual adjustment and automatic adjustment integrated gearbox. The electronic shift lever circuit comprises a vehicle-mounted direct-current power source feedback circuit unit, a P-gear acquisition circuit unit, a lock control signal acquisition circuit unit, a gear indicting circuit unit, a processor unit, an ESD protective circuit unit, an LIN transceiver unit, an LIN signal filtering unit and a power source unit. The five output ends of the processor unit are connected with the control ends of controllable switching circuit units of a P-gear driving circuit unit, an R-gear driving circuit unit, a N-gear driving circuit unit, a D-gear driving circuit unit and a M-gear driving circuit unit correspondingly through the ESD protective circuit unit; and the vehicle-mounted direct-current power source feedback circuit unit, the P-gear acquisition circuit unit and the lock control signal acquisition circuit unit are connected with the input end of the processor unit through the ESD protective circuit unit, the data end of the processor unit is connected with the RXD end and the TXD end of the LIN transceiver unit, and the LIN end of the LIN transceiver unit is connected with the LIN signal filtering unit and used for being connected with a controller of the gearbox.

The present invention discloses a method and an apparatus for monitoring the number of rolling passes of a roller and determining whether the rolling is qualified. The present invention belongs to thefield of road construction, and particularly relates to a method for monitoring the number of rolling passes of a roller and determining whether the rolling is qualified. The method comprises: S1: determining a range of each lane of a road section constructed by using a roller, and dividing each lane into cells; S2: calculating the number of rolling passes of each cell; S3: determining whether the number of rolling passes of the cell is qualified; and S4: determining whether the rolling overlap width between adjacent lanes meets the requirements. According to the technical scheme provided bythe present invention, the number of rolling passes of cells of each lane is monitored in real time, and the number of rolling passes of the lane is monitored to prevent missing rolling or excessive rolling and improve the rolling quality.

The invention discloses a power balancing method for a single power battery for a vehicle. The method is applied to a battery management system, so that the power of the single power battery can be kept within a range of SOC<AVE>+/-eta. According to the performance attributes of the power battery, eta2 is smaller than eta1 at the first half stage of a life cycle of the vehicle, the power of the single power battery can be kept within a range of SOC<AVE>+/-eta1 through balancing, the power consumed for balancing the power management system is the power designed by power battery redundancy, and the requirements of the vehicle on the power of the battery are not affected by balancing. At a later half stage of the life cycle of the vehicle, eta2 is greater than eta1, the power of the single power battery can be kept within a range of SOC<AVE>+/-eta2 through balancing, the condition that the power deviation of the single battery does not exceed the consistent characteristic is ensured by the balancing function, the phenomena of accelerated ageing, under voltage and zero voltage of individual single battery can be avoided, the power battery meets the requirements of the vehicle on energy, and the consistent characteristic is also ensured, so that the balancing target is more explicit.

The invention provides a storage battery pack sampling line breakage detection device and a storage battery pack sampling line breakage detection method. The line breakage detection device comprises acurrent-limiting resistor module which comprises n current-limiting resistors and a reference current-limiting resistor, a divider resistor module comprising n divider resistors, detection switch modules in which each detection switch is provided with one end connected with the corresponding divider resistor and provided with the other end connected with the corresponding current-limiting resistor and the divider resistor corresponding to the adjacent high-node single battery, a switching resistor module comprising n switching resistor units, a voltage acquisition module each used for singlebattery voltage acquisition and voltage real-time diagnosis, a comparison and judgment module used for turning off a corresponding switching tube when judging that the voltage of the single battery isgreater than a preset reference voltage, and a microprocessor used for controlling the on-off of the detection switches, calculating a theoretical diagnosis voltage, and judging that a correspondingacquisition line is in a broken line state when judging that the real-time diagnosis voltage is not in the error range of the corresponding theoretical diagnosis voltage.

The invention discloses a rasterization-based unmanned road roller operation path planning method and system. The method comprises the following steps of performing rasterization processing on a construction layer pavement plane; designing a road roller circulation route; acquiring position information of the road roller in a construction layer pavement plane in real time, constructing a road roller motion model, and controlling the road roller to perform construction operation according to a circulating route mode; rolling compaction information of each grid is obtained, the rolling compaction condition of the grids is judged, and when the grids meet the rolling compaction process requirements, the road roller does not roll the grids any more. The unmanned road roller operation path planning system is used for executing the path planning method. The compaction information of the grids is obtained in real time through rasterization, and the compaction quality of the construction area can be effectively monitored; according to the method, route planning guidance is carried out on the unmanned road roller in the dimension of compaction quality, the problems of underpressure, overpressure and the like are avoided, the pavement compaction quality can be ensured, and the re-compaction level is further improved.

The invention belongs to the technical field of illumination and particularly relates to an LED (Light-emitting Diode) drive circuit and a mine explosion-proof lamp. The LED drive circuit provided by the invention comprises a drive module, a mine battery protector, a storage battery, a current-limiting module and an overcurrent and overvoltage protection module. According to the LED drive circuit, electric energy stored in the storage battery is utilized for supplying power to the whole LED drive circuit, and the mine battery protector is adopted to protect the battery, so that the battery is prevented from the phenomena such as overvoltage, undervoltage, overcurent or short circuit; in addition, the overcurrent and overvoltage protection module is utilized to disconnect a power supply loop under a condition that overcurrent and overvoltage occur; meanwhile, diodes in the current-limiting module are utilized to limit currents output by the storage battery; furthermore, the drive module only outputs currents which are less than one third of the rated working current of an LED module. Since the whole circuit has high safety, the mine explosion-proof lamp adopts a light shell, so that the portability of the mine explosion-proof lamp is enhanced.

The invention discloses a method for detecting transverse compactness and uniformity of a roadbed. The method comprises the steps that before a roadbed to be compacted is compacted, whether a first linear regression equation K = aF<SE> + b and a second linear regression equation s = cI<n> + d can be obtained or not is judged, wherein in the formulas, K is the transverse compactness, F<SE> is the resultant force of the counter force of a compacted layer, s is a transverse compactness uniformity parameter, and I<n> is a transverse uniformity index; if yes, the first linear regression equation and the second linear regression equation are obtained; acceleration information of a road roller is acquired in the process of compacting the roadbed to be compacted; the resultant force of the counter force of the compacted layer and the transverse uniformity index of the compacted layer are calculated according to a calculation rule and the acceleration information; and the transverse compactness of the roadbed to be compacted is determined according to the resultant force of the counter force of the compacted layer and the first linear regression equation, and the transverse compactness uniformity parameter of the roadbed to be compacted is determined according to the transverse uniformity index of the compacted layer and the second linear regression equation. According to the method, the transverse compactness and uniformity of the roadbed can be detected in real time.

The embodiment of the invention discloses a road roller facing system. The road roller facing system comprises: a non-contact distance measuring device used for collecting a first distance between a front wheel edge of a road roller and a roadside edge and a second distance between a rear wheel edge and the roadside edge; a contact type distance measuring device used for collecting a third distance between the front wheel edge of the road roller and the roadside edge and a fourth distance between the rear wheel edge and the roadside edge; an angle sensor used for collecting the rotation angle of the road roller; a vehicle speed sensor used for collecting the vehicle speed of the road roller; and a display controller used for adjusting the turning angle and the vehicle speed of the road roller according to the first distance, the second distance, the third distance, the fourth distance, the turning angle and the vehicle speed to make the road roller run along the edge. According to the invention, the automatic welt compaction of the road roller is realized, the operation of a driver is not needed, the requirement on the operation skill of the driver is reduced, the welt compaction safety and the road edge construction quality are effectively improved, and the phenomena of underpressure and slag falling are avoided.