68results about How to "No substantial increase in cost" patented technology

The invention discloses an improved alternative current-alternative current frequency converter system through utilization of a phase-shifting transformer. The system comprises a power grid and a three-phase alternative current-alternative current frequency converter connected with the power grid. The power grid is connected with one output phase of the three-phase alternative current-alternative current frequency converter through a common three-winding transformer, and the power grid is connected with another two phases of the three-phase alternative current-alternative current frequency converter through the phase-shifting transformer. The alternative current-alternative current frequency converter system can further reduce total harmonic distortion (THD) of input current, improves quality of electric energy between the power grid and a production field of an industrial enterprise, and has the advantages of being simple in implementation method, and low in cost.

The invention provides a preparation method of a large-size graphene/graphite composite negative pole material, and relates to a preparation method of a composite negative pole material. The invention aims to solve the problems that the energy density and the power density are low, a discharging platform is high and first Kulun efficiency is low existing in an existing graphite negative pole material. The method comprises the following steps: (1) preparing large-size graphene oxide; (2) preparing a large-size graphene oxide and graphite compound; (3) annealing the compound so as to obtain the large-size graphene/graphite composite negative pole material. The lithium storing capacity of the large-size graphene/graphite composite negative pole material prepared by the preparation method disclosed by the invention is 372 mAh/g-401 mAh/g, the Kulun efficiency is 85%-90%, the capacity of the large-size graphene/graphite composite negative pole material achieves 162 mAh/g at the rate of 5C, which is 2 times higher than that of an ordinary business graphite, and after 2000 cycles, the reservation of the capacity is more than 95%. According to the invention, the preparation method of the large-size graphene/graphite composite negative pole material can be obtained.

The invention relates to an image mosaic technology-based PCB working sheet AOI (Automatic Optic Inspection) method. A camera is arranged on a working table of an AOI device and is arranged on an XY plane moving guide rail; PCB working sheets are placed on an inspection area of the working table and are divided into a plurality of shooting areas arranged in a matrix shape; the XY plane moving guide rail drives the camera to reach positions above the centers of the shooting areas in sequence from front to back and from left to right for performing positioning static-state shooting; shot images are stored in an inner memory in the AOI device; and an image processing unit can run in an inner processing unit in the AOI device and can be used for extracting the images in the inner memory and splicing all the images to obtain a complete image by adopting an image mosaic method. According to the method, the AOI on large PCB working sheets can be realized on the premise of not greatly increasing the cost of the devices.

The invention relates to a real time positioning system and belongs to the field of communication technology. The real time positioning system is characterized by comprising a positioning label, a positioning mark, a wireless network access point, and a management server, wherein the positioning label is arranged on an object or personnel which need to be positioned and tracked; the positioning mark is arranged on a fixed reference point; communication and measurement are performed among the positioning mark, the positioning label and the wireless network access point by using a wireless network; the wireless network access point is connected with the management server through the internet; and the management server calculates the position of the positioning label according to the received information. Thus, due to the reasonable use of the positioning mark, the positioning accuracy is greatly improved on the premise of no substantial increase of system cost. Besides, as the positioning mark only needs to realize a simple function of periodic sending, both the power consumption and the cost of the positioning mark are greatly decreased compared with an AP. In most cases, a battery or solar energy can be used for supplying power to the positioning mark, so no power supply wiring and network wiring are needed.

The invention discloses an oil shale external heat radiation type retort. Under the condition that the cost is not increased remarkably, a combustion chamber is added on a retort body, a combustion gas pipe and a combustion-supporting air pipe are connected onto the combustion chamber, gas and air are combusted in the combustion chamber through a combustor, and heat is transferred to an oil shale in a destructive distillation chamber through a combustion chamber furnace wall in a heat radiation mode, namely the heat required by oil shale temperature destructive distillation is provided by the external heat radiation instead of an original gas heat carrier. Therefore, the temperature in the combustion chamber is ensured to be stable, and heat quantity is utilized fully. Produced net retorting gas is high-calorific-value retorting gas produced through shale low-temperature destructive distillation, retorting gas amount of a furnace outlet per ton of shale is about 40Nm<3>, and the volume ratio of H2 content in the retorting gas is not smaller than 50%. The volume flow rate of the retorting gas is reduced, accordingly the load of a follow-up oil recovery workshop section is lightened, and public and auxiliary facilities are decreased.

The invention, which belongs to the technical field of smart home, discloses a control method and system for a smart home device. The method comprises the following steps that: when a camera device detects that preset enabling conditions have been met and a collected real-time image is detected to contain a first gesture, entrance to a device control mode corresponding to the first gesture is triggered, a real-time image is continuously collected and a second gesture is recognized after entrance of the device control mode, the second gesture is converted into a gesture instruction for a smarthome device to which the device control mode belongs, and the gesture instruction is sent to a gateway device; and if gesture instruction containing is determined among a plurality of preset gesture instructions being acquired from a smart terminal in advance and being supported by smart home devices, the gesture instruction is allocated to the corresponding smart home devices to control the smarthome devices to perform the corresponding operations. Therefore, the smart home device control mode except the smart phone or the infrared remote controller can be provided for the user, so that theuser experience is improved.

The invention belongs to the field of application of multiple underwater robots, and particularly relates to a target searching method through coordination of multiple underwater robots. By the targetsearching method, coordinated estimation of the multiple underwater robots during deep-seat searching process is achieved, target position and clock jitter estimation of an underwater active target is achieved, speed compensation under the condition that a Doppler speedometer cannot trace is achieved, the positioning accuracy of the multiple underwater robots is improved, and the large-range navigation operation is met. The target searching method through coordination of the multiple underwater robots involves a Doppler speedometer module, a water sound synchronous communication equipment module, a non-linear estimation module and a coordinated queuing control module. A failure target position can be effectively estimated during the process of executing a searching task at deep sea by themultiple underwater robots, enough positioning accuracy also can be maintained, and the large-range target searching operation demand of a multi-underwater robot system is satisfied under the condition that system complexity is not improved a lot and equipment cost is not increased a lot. The method is clear in logic and is simple to practice.

The invention discloses a battery pack with a static discharge protective function and an electronic device. The electronic device comprises a conductive shell and a circuit board, wherein the circuit board is arranged in the conductive shell, and comprises a power supply earth point and a conditional conducting path; the conditional conducting path further comprises a conductive element and a static discharge element; one end of the conductive element is electrically connected with the conductive shell; and the static discharge element is electrically connected between the other end of the conductive element and the power supply earth point. When the voltage difference between the two ends of the static discharge element satisfies a preset condition, the static discharge element is conducted, otherwise the static discharge element is equivalent to a high-impedance element for the power supply earth point. Moreover, the power supply earth point is electrically connected with a battery, so that a static discharge protection effect is achieved by using the battery.

The invention relates to a memory pillow with strengthened support, belonging to the pillow technical field. The pillow includes a memory layer made of a material capable of restoring deformation; A support layer arranged below the memory layer, the support layer being formed of at least a plurality of air bags arranged adjacent to each other, the air bags being wrapped by an elastic material andfilled with air having a pressure greater than one standard atmospheric pressure; the upper surface of the airbag is a plane or a convex curved surface; A base layer is arranged below the support layer. The memory pillow with enhanced support is used for customers who need to strengthen the pillow, and has good support durability and comfort, and enhances the pillow support performance on the premise of not increasing the pillow cost greatly, and produces different support effects in different support areas with the memory material, which is more in line with ergonomics.

The invention discloses high-conductivity steel for an anode rigid claw and a preparation method of the steel, and belongs to the technical field of low-alloy steel. Trace alloy elements are added, the total quantity and proportion of the alloy elements are controlled, a proper preparation technology is used fro controlling a reasonable structure composition and grain size, and the steel materialwith good conductivity and mechanical property and structural function integration and for the anode rigid claw is obtained. The steel comprises, by weight, 0.01-0.1% of C, 0.01-0.5% of Si, 0.01-1.0%of Mn, 0-0.01% of S, 0-0.02% of P, 0.01-0.5% of Al, 0.01-0.2% of V, 0.004-0.02% of N and the balance Fe and inevitable impurities. C, Si, Mn, P, S, Al, V and N simultaneously meet the requirements that the content sum of C, Si, Mn, P, S, Al, V and N is larger than or equal to 0.35%, V/(C+N) is larger than or equal to 0.45 and smaller than or equal to 5.8, V/Al is larger than or equal to 0.25 and smaller than or equal to 1.2, the content of ferritic structures in the steel is not lower than 90%, the content of pearlitic structures is not higher than 10%, and the average grain size of the steelis larger than or equal to 20 micron and smaller than or equal to 200 micron . The high-conductivity steel for the anode rigid claw can be used for the anode rigid claw in electrolytic aluminum.

The invention relates to a high-strength high-elastic-modulus deformed magnesium alloy and a preparation method thereof. The high-strength high-elastic-modulus deformed magnesium alloy consists of thefollowing elements in percentage by mass: 6.5-15.0% of Zn, 0.3-0.5% of Zr, 0.1-0.5% of Sr, 0.01-0.1% of Sc, and the balance of magnesium, wherein a magnesium alloy is a hypoeutectic alloy, and an eutectic phase in the alloy is in interrupted distribution. Raw materials are smelted, atomized, subjected to hot-press sintering, extrusion forming and ageing treatment to obtain the magnesium alloy. Elastic modulus is 57-67GPa.

The invention provides a method which prolongs the service life of a concrete delivering pump pipe and a pump pipe thereof, belonging to the concrete machine field. The existing concrete delivering pump pipe has the problem that the cost is low but the service life is short or the service life is long, but the manufacture cost and the weight are high and the performance/price ratio is low. The invention and the pump pipe which is manufactured by the method of the invention lead the concrete to mainly generate friction with a guide bar when the concrete motions in the pipe as a guide bar which is made of highly wearable material is added on the internal wall of the pipe body, thus generating little or no friction with the internal wall of the pump pipe body; therefore, the abrasion of the internal wall of the pipe body is reduced, the weight of the structure is lightened, the manufacture cost is reduced and the performance/price ratio of the pump pipe is obviously improved. The invention is mainly applicable to concrete machines such as concrete pump trucks, concrete tractive pumps, etc.

The invention relates to a method for preparing fluorescent carbon quantum dots through electric spark discharge. Two electrodes are soaked with an organic medium, and the two electrodes are connected with two poles of a pulse power supply respectively. The interval between the two electrodes is controlled, continuous pulse discharge is generated between the two electrodes, the organic medium between the electrodes is split through pulse discharge, and the carbon quantum dots are obtained. The method has the advantages that efficient, safe, low-cost, pure and continuous preparation is achieved, and the fluorescence property of the prepared carbon quantum dots is good.

The invention provides a dry-burning preventing kettle coupler with fusing. The dry-burning preventing kettle coupler comprises a surface plate, a central rod, a first terminal ring, a second terminal ring, connecting pieces, a first terminal, a second terminal, double metal discs, a ceramic rod, a fusing device and a bracket body, wherein the first terminal and the second terminal are respectively fixedly mounted on the bracket body; fixed contacts are respectively fixed arranged at the terminal parts of the first terminal and the second terminal; one end of each connecting piece is electrically connected with the first terminal ring and the second terminal ring respectively; one moving contact is fixedly arranged at the other end of each connecting piece; two moving contacts are respectively propped against fixed contacts on two terminals movably; the centers of the double metal discs are fixedly connected with disc mounting parts; the ceramic rod is propped against the edges of the double metal discs so that the fixed contacts and the moving contacts are in normal closed power on/off connection; the fusing device is connected with one of the connecting pieces so that the fixed contacts and the moving contacts are in normal closed power on/off connection. By virtue of the fusing device, the security property can be further ensured.

This invention relates to a preengaged timing system including a digital signal receiver for receiving and transferring a digital signal containing current time, a first connector, a LC TV controller coupled to the digital signal receiver via the first interface to pick up the current time and operate it with preengaged time to generate rest time, a second connection interface and an inserted controller including a real time frequency circuit, a nonvolatile memory unit and an O/I unit coupled to the controller via the second connection interface, which rceives the rest time and outputs a trigger signal to an electronic device when the time is counted to a definite time value, and the real time frequency circuit is used in counting the rest time and the nonvolatile memory unit is used to store the time.

The invention relates to a reinforcing support mattress and belongs to the technical field of mattresses. A support base layer is disposed in the mattress. A support adjustment layer is arranged on atleast one part of the support base layer. The support adjustment layer at least comprises a plurality of adjacent airbags. The airbag is coated with an elastic material and the elastic material is filled with air under pressure greater than 1atm. The upper surface of the airbag is a flat or convex surface. The reinforcing support mattress improves the support durability and support comfort of themattress, does not greatly increase the mattress cost, improves the support performance of the mattress, can produce different support effects by different support regions and meets the human engineering requirements.

The invention relates to a cloth duct with a heat preservation function. The cloth duct is characterized in that cloth fiber is taken as an outer layer, a mesh fabric is taken as a middle layer, and a PVC (polyvinyl chloride) film or TPU (thermoplastic polyurethane) film added with a fire retardant is taken as an inner layer. According to the cloth duct, on one hand, the thickness of the a cloth air duct is increased, and the thermal-conduction resistance is enhanced; and on the other hand, the middle mesh layer is added, so that a gap is reserved between the inner layer and the outer layer, and the thermal resistance is enhanced further. The cloth duct with the heat preservation function has the benefits as follows: on the premise that the installation material and the installation project amount are not added, the heat retaining property of an air supply duct can be enhanced, the air supply temperature is guaranteed, and energy conservation and consumption reduction are realized; and the construction is simple, and the installation is convenient.

The invention discloses a high-speed filling self-adaptive control system and method. In order to solve the problem that a manual filling control method is still widely used in a small-dose high-speedliquid food filling machine with high filling precision requirements, and large filling errors caused by characteristic time varying of a filling system are difficult to solve, the liquid food filling system based on weighing self-correction is designed so as to improve the filling precision of the high-speed filling system. On such basis, in order to solve the problem of filling characteristic change caused by system nonlinearity, a self-adaptive intelligent filling control algorithm capable of overcoming time-varying and nonlinear influences is designed. According to the method, the influence of human factors can be avoided, and automatic and high-precision control over an existing filling system is achieved under the condition that the cost is not greatly increased.