50results about How to "Conserve limited resources" patented technology

The invention relates to a low silver copper base medium temperature brazing filler metal applicable to braze welding of workpieces such as copper and copper alloy, copper and steel, belonging to the field of medium temperature brazing material. The formula and content of the low silver copper base medium temperature brazing filler by weight percentage is as follows: Ag: 1.8-5%, P: 5.5-7.5%, In: 0.5-2.5%, Ni: 0.01-1%, the rest: Cu. The invention has the advantages of rational design of formula, low manufacture cost, relatively low melting temperature of the brazing filler metal when welding copper and copper alloy and copper and bundy tubes, good wetting property and fluidness, smooth and bright surface of soldered connection, high mechanical strength, fine processing property of braze welding, stable quality and good uniformity and capability of replacing noble metal silver brazing filler metal BAg25CuZnSn.

The invention discloses a rolling method for producing a copper clad aluminum row, which comprises the following steps: 1, selecting a copper pipe with uniform wall thickness and an aluminum bar in transition fit with the inner wall of the copper pipe, and cleaning the copper pipe and the aluminum bar to remove oil stains and oxidation layers; 2, pressing the aluminum bar into the copper pipe to form a composite blank, and plugging two ends of the composite blank tightly; 3, heating the composite blank to between 300 and 540 DEG C, preserving the heat for 30 to 60 minutes, then thermally rolling the composite blank for 1 to 3 times, and coldly rolling the composite blank for 1 to 4 times; 4, straightening and acid-washing a rolled product; 5, carrying out diffusion treatment at the temperature of between 200 and 550 DEG C under the protection of nitrogen of one atmospheric pressure, and preserving the heat for 1 to 3 hours; and 6, drawing the treated product to form a final product. The rolling method for producing the copper clad aluminum row not only has short process flow and high production efficiency, but also can save limited resources and reduce the cost.

The invention discloses a high-performance multi-alloy wear-resistant ball, and a preparation process and a thermal treatment method thereof. The high-performance multi-alloy wear-resistant ball consists of the following components in percentage by weight: 2.0 to 2.6% of C, less than or equal to 1.0% of Si, 1.6 to 2.0% of Mn, more than or equal to 27% of Cr, 0.05 to 0.15% of Re, less than or equal to 0.05% of P, less than or equal to 0.05% of S, less than or equal to 0.3% of Mo, 0.1 to 0.3% of Ni, 0.05 to 0.08% of Al and the balance of Fe. When the high-performance multi-alloy wear-resistant ball is prepared, a metal mold sand coating process is adopted for formation, the thickness of a sand coating layer is controlled to be 1.5 mm to 3.5 mm, and the diameter of the wear-resistant ball is controlled to be phi 50 mm to phi 130 mm. According to the high-performance multi-alloy wear-resistant ball, and the preparation method and the thermal treatment method thereof, the high-performance multi-alloy wear-resistant ball obtained by adjusting the contents of C, Si, Mn, Cr, Re, P, S, Mo, Ni and Al elements, controlling the thickness of the sand coating layer in a preparation process and adjusting the thermal treatment method process in a thermal treatment process has high mechanical properties, strong impact toughness and small unit wear.

The invention discloses a multielement microalloy low chromium white iron grinding ball which comprises the chemical components by weight percentage as follows: 2.4-2.7% of C, 0.5-0.8% of Si, 1.2-1.5% of Mn, 2.4-2.8% of Cr, 0.2-0.3 of Mo, 0.08-0.15% of W, 0.3-0.5% of Cu, 0.08-0.14% of V, 0.02-0.04% of Ti, 0.015-0.03% of B, 0.08-0.12% of Y, 0.05-0.08% of Ce, P smaller than or equal to 0.05%, S smaller than or equal to 0.05%, and the balance of Fe. According to the invention, wear resistance, high hardness, high tenacity and high impact resistance of the grinding ball are ensured by optimizing material formula to low chromium white iron, regulating the casting and melting process and combining a reasonable thermal processing method. Not only is production efficiency of a ball grinding mill improved, but also the production cost and energy consumption are further effectively reduced, the limited resources are saved, and extremely high economical value and social benefit are obtained.

The invention discloses a multielement low alloy bainite spheroidal graphite cast iron grinding ball which comprises the chemical components by weight percentage as follows: 3.2-3.5% of C, 2.5-2.8% of Si, 0.3-0.5% of Mn, 3.2-3.3% of Cr, 0.5-0.8 of Mo, 0.5-1.0% of Cu, 0.03-0.05% of Mg, 0.02-0.03% of La, 0.02-0.04% of Y, 0.02-0.03% of Er, P smaller than or equal to 0.08%, S smaller than or equal to 0.04%, and the balance of Fe. According to the invention, wear resistance, high hardness, high tenacity and high impact resistance of the grinding ball are ensured by optimizing material formula, regulating the casting and melting process and combining a reasonable thermal processing method. Not only is production efficiency of a ball grinding mill improved, but also the production cost and energy consumption are further effectively reduced, the limited resources are saved, and extremely high economical value and social benefit are obtained.

The invention provides a wearable sleep monitor and a monitoring method. In one embodiment, the wearable sleep monitoring method comprises the following steps: step a): collecting blood oxygen saturations of a testee in preparation for sleep and during sleep, and acquiring a blood oxygen saturation parameter value; step b) in the sleeping process, when the blood oxygen saturation parameter value is reduced and the reduction maximum value is greater than or equal to a first threshold value, determining that small awakening occurs, and when the reduction duration time (D1) is greater than or equal to 10 seconds, determining that sleep apnea/hypopnea occurs once; step c), collecting electroencephalogram, snore and myoelectricity of the testee during sleep, and monitoring whether the testee has at least one of small awakening, snore and muscle activity or not during reduction of the blood oxygen saturation parameter value, and step d), repeating the steps a) to c).

An electronic potentiometer module having a complete operating characteristic and a function is an integrated multifunctional electronic potentiometer module formed by combining circuits for the electronic elements. The module is provided with all the characteristics of a mechanical potentiometer and the strong and abundant expansion properties and functions thereof. The module can be directly used in any place requiring the potentiometer. The performance index of the related product especially the nonvolatile and self-power-supply property can be promoted, so as to use the potentiometer module as a mechanical potentiometer. The self-scaled or digital display, multi-coupling sync output, multiple output modes and output properties, multiple output regulating methods, multiple control circuits and multiple input output interface functions are all fit for the requirement of the development of modern electronic technique on the application of the potentiometer.

The invention discloses a novel multi-element alloy grinding forging and a preparation method and a heat treatment process thereof. The novel multi-element alloy grinding forging comprises the following components in percentage by weight: 2.2 to 2.8 percent of C, less than or equal to 1.0 percent of Si, less than or equal to 0.8 percent of Mn, more than or equal to 10 percent of Cr, 0.05 to 0.15 percent of Re, less than or equal to 0.05 percent of P, less than or equal to 0.05 percent of S, 0.1 to 0.3 percent of V, 0.05 to 0.2 percent of Ti, 0.05 to 0.08 percent of Al, and the balance of Fe. The novel multi-element alloy grinding forging is formed by adopting a metal mold sand coverage process, the thickness of a sand coverage layer of the forging is between 3mm and 4mm, and the size of the novel multi-element alloy grinding forging is phi (40-60)mm*(50-70)mm. By adjusting the content of the C, Si, Mn, Cr, Re, P, S, V, Ni and Al elements, controlling the thickness of the sand coverage layer in the preparation process and adjusting the heat treatment process, the obtained novel multi-element alloy grinding forging has the advantages of good mechanical property, strong impact toughness and low unit abrasion.

The invention discloses a task stack overflow detection method and system, and the method comprises the steps: responding to task creation, determining the position of a stack bottom according to thedistributed task stack information, and carrying out the assignment of the last n bytes of the stack bottom; in response to system scheduling, enabling the task to be switched among all states, irregularly checking whether the last n bytes at the stack bottom of the task stack space are equal to pre-assigned values or not, wherein the task states include the creating state, the ready state, the running state, the waiting state, the hanging state and the stopping state; and determining that task stack overflow exists in response to the fact that the last n bytes of the stack bottom of the taskstack space are not equal to a pre-assigned value. According to the method, a processor does not need to be supported by MMU/MPU hardware, extra codes are not added to the function, the size of a compiled mirror image is not increased, and the method is particularly suitable for an operating system of the Internet of Things equipment.

The invention particularly relates to a new-energy intelligent multifunctional conversion car and a control method and belongs to the field of cars. The car comprises a car box body, a driving mechanism, a toilet partition, a squatting pan, a kitchen partition, a folding appliance, a lifting appliance, a right outward retractable closed balcony, a left outward retractable opened balcony, a water supply tank, a waste water tank, a storage battery, passenger seats, an external power socket and a storage cabinet. According to the car, the use functions of a passenger car and a motor home are successfully combined into the car type of one car, the space of the car and the limited resources of the country are fully saved and utilized, and since two original cars are replaced with one car through the functional conversion, not only are the occupation of parking spaces and traffic flow blockage reduced, but also environmental pollution is reduced. Great convenience is brought to the happy life of people, the economic loss of repeated car purchase of people is also decreased at the same time, the new-energy intelligent multifunctional conversion car meets the social development demand in the future, and the car capable of realizing intelligentization and multifunctional integration is truly achieved.

The invention discloses a gesture recognition method fusing an electromyographic signal and a visual image, and the method comprises the steps: collecting an electromyographic signal through a high-density electromyographic signal collection arm band, collecting a visual image through a camera, and fusing an electromyographic image converted from the electromyographic signal with the visual imageto obtain an image; and inputting the image obtained by fusing the surface electromyographic image and the visual image into an image classification module for identification and classification. According to the method, two different network structures do not need to be used for identifying and classifying the surface electromyographic signals and the visual images, the surface electromyographic signals and the visual images only need to be transmitted into the network architecture at the same time, identification and classification can be carried out by using the same network, the network complexity can be effectively reduced, and limited resources are saved. According to the invention, the form of using a single input mode to carry out gesture recognition in each set of traditional network can be improved, and the respective limitations that the surface electromyographic signal and the visual image are respectively used for gesture recognition are improved.