45 results about "Physical laboratory" patented technology

The invention discloses an aluminum alloy section for physical laboratory cabinet and a preparation method thereof. An alloy comprises, by weight, 4.2 to 5.4% of Zn, 1.8 to 2.6% of Mg, 0.15 to 0.35% of Cu, 0.3 to 0.7% of Mn, 0.05 to 0.25% of Cr, no more than 0.15% of Ti, 0.3 to 0.6% of Si, no more than 0.25% of Fe, 0.1 to 0.2% of Zr, 0.08 to 0.14% of Cd, 0.04 to 0.06% of In, 0.3 to 0.05% of Sc, 0.025 to 0.045% of Er and 0.01 to 0.02% of Tm, with the balance being Al. According to the invention, through optimization of alloy components and reasonable arrangement of heat treatment technology, the prepared aluminum alloy section has excellent comprehensive mechanical properties, tensile strength of no less than 450 MPa and non-proportional extension strength of no less than 400 MPa, can substantially improve safety performance of the aluminum alloy laboratory cabinet, is applicable to preparation of the physical laboratory cabinet without dependence on import materials and has important economic benefits.

The present invention discloses a physics laboratory instrument. The physics laboratory instrument comprises a location frame, a rotation arm, a servo motor, an upper and lower cylinder, a temperature sensor and a master control box. The rotation arm comprises a movable end and a rotation end, the movable end is a cylindrical structure and is cooperatively arranged at the outer portion of the location frame, the master control box is fixedly arranged at the side wall of the movable end, the rotation end is provided with the upper and lower cylinder, the driving shaft of the upper and lower cylinder is vertically arranged downwards, the end portion of the driving shaft is provided with the temperature sensor, the servo motor is arranged on the location frame, the driving shaft of the servo motor is in cooperation connection with the side wall of the movable end, and the master control box is electrically connected with the servo motor, the upper and lower cylinder and the temperature sensor through wires. The structure principle is simple, the automation degree is high, the temperature sensor is controlled to be regulated to an assigned position when the temperature sensor is required to detect temperature so as to avoid too fast aging rate of the device main body and lines in the high-temperature environment for a long time and solve the problems that the device usage period is short and the efficiency is low.

The invention relates to a desktop cloud-based resource optimization allocation method, which belongs to the technical field of resource scheduling. A desktop cloud-based resource optimization allocation method, including a desktop cloud-based resource optimization allocation method, the following steps: S1: According to the professional teaching desktop cloud D based on professional teaching, the teacher T defined by the scope of teaching courses , Build a laboratory resource optimization model based on the student S who has completed the semester course goal; calculate the ideal number of desktop clouds, recalculate the minimum number of desktop clouds according to the limit of the number of professional teachers, and try to let those who have arranged experimental teaching according to the determined number of desktop clouds D The physics lab is as full as possible. The invention can maximize the use of desktop cloud resources, allow the physical laboratory to fully meet the use of desktop clouds, and allow the desktop cloud to achieve the highest utilization rate under limited teacher resources.

A twisting-preventive compound pendulum contacting by circular spherical grooved surface and relates to college physical test, in particular to manufacturing of a twisting-preventive pendulum. A pendulum rod in a physics lab is generally in linear contact with a hanging rod and always twists. A kind of a pendulum rod is in spot contact via a knife edge but is poor in durability. The technical scheme of the twisting-preventive compound pendulum includes that a circular hole is reserved on the pendulum rod, a circular groove is reserved at the center of the circular hole, the bottom of the cross section of the circular groove is semi-circular, a projection in the shape of a thin circular cake is formed on the hanging rod, the top of the cross section of the cake is semi-circularly formed, the diameter of the semicircular top of the hanging rod is smaller than that of the semicircular bottom of the groove of the hanging rod, so that two spherical surfaces are guaranteed to be in spot contact. The hanging rod in spherical contact is small in friction, low in abrasion and high in durability. Vertical state of the swing rod can be guaranteed and no twisting is caused due to the fact that the spherical contact is spot contact, test error is reduced, testing accuracy is increased, horizontal adjustment procedures of instruments are reduced and test speed is increased.

A large volume decimal capacitance box used in physical laboratories of universities is composed of two-step disks of 10x0.1muF and 10x1muF and two cut out and cut-in switches of 10muF or 10muF, 20muF. This invention strings ferrite magnetic beads on the lead connecting the capacitor and the switch to suppress the generation of inrush current and arc so as to increase the lifetime of switches.

The invention provides a pear-shaped bottle liquid dispensing tray frame for a chemical physics laboratory, comprising a base plate, a marking block and a clamping nut; the base plate is a vertical plate structure with an inner groove, and two of the base plates An upper support plate and a lower support plate are respectively connected therebetween. The invention provides a pear-shaped bottle liquid dispensing tray rack for chemical physics laboratory, the adjustment box and the lower support plate are arranged, and the lower end of the spring is against the bearing fixedly arranged on the bottom plane of the adjustment tank, while the upper end of the spring is It just hits the bottom plane of the fin platform, so that the lower support plate can have a certain cushioning performance in the process of adjusting up and down, which is convenient for stability during operation, and finally realizes pear-shaped bottles that can adapt to different specifications, changing the traditional single bottle. In the fixed form, it only needs to replace the upper support plate and adjust the height of the lower support plate to adapt to pear-shaped bottles of different specifications.