34results about How to "Precise displacement control" patented technology

The invention discloses an electric stair-climbing robot which comprises a stair-climbing machine table. The stair-climbing machine table is longitudinally provided with two through grooves. Two oil motors are symmetrically arranged on the lower portion of the stair-climbing machine table. A force output shaft of each oil motor is connected with a lead screw, and the lead screws are installed on the stair-climbing machine table. Each of the two lead screws penetrates through one oil cylinder, inner threads matched with the lead screws are arranged in the oil cylinders, and the oil cylinders and the lead screws form thread transmission pairs. The tops of the oil cylinders are fixedly connected with a clutch, the clutch is located in the through grooves, a manned plate is arranged at the top end of the clutch, and the oil cylinders drive the manned plate to move through the clutch. Stair climbing can be achieved by means of the two oil cylinders through stretching, retracting and forward and backward alternative movement of piston rods.

The invention is a large multifunctional frozen soil-structure interface cyclic direct shear apparatus and a test operation method. The structure of the apparatus comprises a horizontal and vertical loading system, a horizontal and vertical displacement and a load sensor, a temperature control and refrigeration system, a temperature sensor, a data collecting and self-stabilizing system, a guide rail system, and a soil sample box and supports. The test operation method comprises the steps of: 1. Installing the interface steel of required roughness; 2. Applying normal boundary conditions to a soil sample; 3. Cooling the soil sample; and 4. When the temperature cools to a target temperature, performing a shearing to the frozen soil interface in a selected shearing speed, at the same time the date collecting system beginning to record the stress-strain relation of the frozen soil interface. The apparatus and the method are the advantageous in that: 1) accurate control of the interface temperature in the temperature range between 0 DEG C and -20 DGE C can be achieved; 2) three normal boundary conditions of constant stiffness, constant displacement and constant stress can be accurately applied; 3) interfaces of various roughness can be simulated; 4) two shear modes of cyclic shear and monotonic shear can be realized; and 5) the stress applying and displacement control are accurate.

The invention discloses a pallet-free off-line stacking device. The pallet-free off-line stacking device comprises a pallet returning machine, a primary brick push mechanism, a primary brick receivingplatform, a secondary brick push mechanism, a secondary brick receiving platform, a third brick push mechanism, a third brick receiving platform, a fully-automatic green brick stacking machine and apiled brick conveyor. By means of the primary brick push mechanism, bricks on each single layer can be pushed from the pallet returning machine to the primary brick receiving platform. By means of thesecondary brick push mechanism, the bricks on each single layer can be pushed from the primary brick receiving platform to the secondary brick receiving platform. By means of the third brick push mechanism, the bricks on each single layer can be pushed from the secondary brick receiving platform to the third brick receiving platform. By means of the fully-automatic green brick stacking machine, the bricks on each single layer can be clamped and delivered from the third brick receiving platform to the piled brick conveyor. The third brick push mechanism comprises two movable push block platesand multiple third fixing push plates, wherein the movable push block plates are used for pushing the bricks, and the third fixing push plates are used for achieving hole reservation operation of thebricks on each single layer. The pallet-free off-line stacking device is good in operation stability, reliable in stacking process, high in locating precision and capable of automatically stacking thebricks into piled bricks with lifting holes.

The invention discloses a quantitative air exchange experiment system for a closed breeding box based on a stepping motor, and relates to a livestock and poultry closed breeding box. The experiment system is characterized in that an air exchange device is arranged at the top on the left inner side of the closed breeding box; a first one-way air vent for air inflow is formed in the top on the right inner side of the closed breeding box; a second one-way air vent for air outflow is formed in the inner middle of the closed breeding box; a third one-way air vent for air outflow is formed in the right inner side of the closed breeding box; the first tee opening, the second tee opening and the third tee opening of a tee are respectively connected with the outlet of the first one-way air vent, the inlet of the second one-way air vent and the outlet of a piston sleeve of the air exchange device; a computer is connected with the stepping motor of the air exchange device. Through the adoption of the stepping motor for control, the purpose of accurately controlling the air input-output volume is achieved; through the adoption of the one-way air vents, one-way flow of air is ensured, and the accurate quantitative air exchange is realized; the experiment system is suitable for accurate control of air control amount in the closed breeding environment.

The technology belongs to the field of pressure vessel inspection devices, and in particular relates to a high-temperature gas-cooled reactor pressure vessel inspection device. The inspection device 1 is located between the outer cylinder wall 2 of the pressure vessel and the cabin cylinder wall 3. The inspection device 1 includes a circular guide rail 4, a track running trolley 5, a lifting rod 6, a two-axis scanner 7, a positioning pin pointing mechanism 8, and a circular guide rail. 4 is a whole ring spliced ​​by a plurality of arc guide rails; the track running trolley 5 is located on the circular guide rail 4 and can move along the track; a lifting rod 6 is installed on the track running trolley 5, and the lower end of the lifting rod 6 carries a positioning pin to point to the mechanism 8. It can be controlled and fixed with the positioning pin at the bottom of the pressure vessel. The lower end of the lifting rod 6 of the present invention carries a positioning pin pointing mechanism 8, which can be controlled and fixed with the positioning pin at the bottom of the pressure vessel.

The invention discloses an anti-shake periscope module, which comprises: a base, a rotating bracket set movably relative to the base, a prism bracket set movably relative to the rotating bracket, and embedded in the prism bracket A prism, a frame fitted with the base, a shell wrapped around the fixed base and the outer periphery of the frame; a first ball assembly, the first ball assembly includes a cylindrical base with a flat end and a plane fixed to the cylindrical base The first magnetic plate seat on the first magnetic plate seat is provided with a fitting groove, and the first magnetic plate is fitted in the fitting groove, and the first magnetic plate is provided on the end surface of the inclined base away from the prism. Magnet fitting groove. According to the present invention, the structure is simple, the performance of the motor is improved and the performance of the motor is stable, and the displacement control of the periscope motor is precise, the power consumption is lower, and the size is reduced to achieve a better anti-shake effect.

The invention belongs to the technical field of the rubber industry, in particular to a rubber tensile intelligent testing device and a testing method thereof. The replacement process of the sample is cumbersome, and the internal sample fixture needs to be disassembled many times. Secondly, during the testing process, the rubber The two ends of the sample need to be tightly clamped and fixed. During the stretching process, the clamped part is often broken first, resulting in inaccurate test results. The following scheme is proposed, including the base, and the top of the base is fixedly installed with a support shell. In addition, a partition is fixedly installed in the middle of the inner wall of the support housing, and a test rotating shaft is installed at the inner bottom of the support housing through a bearing. The present invention can effectively reduce the impact inertia of the parts at both ends when the rubber strip is broken when performing tensile testing on the rubber strip sample. Secondly, the displacement control of the fixing seats at both ends is more accurate, and it can be more intuitive during the tensile test process. It can accurately observe the surface crack and tensile state of the sample, and improve the accuracy and safety of the test results.

The invention relates to a preparation method and preparation mold of an amorphous alloy-copper laminated composite material. The amorphous alloy is an amorphous alloy bar made of 41.25% of Zr, 13.75% of Ti, 12.5% of Cu, 10% of Ni and 22.5% of Be; and the copper is a red copper tube or a brass tube. The outer diameter of the bar is the same with the inner diameter of the copper tube. The preparation method comprises the following steps: under a room-temperature vacuum environment, removing oxide films on the surfaces of the amorphous alloy and the copper through the rubbing effect between the amorphous alloy and the copper; and then heating in vacuum to a temperature in the temperature range of a supercooled liquid region of the amorphous alloy, and keeping the temperature for a period of time to enable the amorphous alloy and the copper to be subjected to atomic diffusion, thus preparing the amorphous alloy-copper laminated composite material. The prepared amorphous alloy-copper laminated material has a tight connection interface between the amorphous alloy and the copper, and the interface is straight and level without any diffusion connection defect such as perforation and the like.

The invention discloses an adaptive robust control method for an electric loading system. The control method includes the following steps: reversely push the loading instruction of the loading system according to the actual output value of the loading system to obtain the speed instruction of the loading system; The actual output value of the loading system and the parameters of the loading system are reversed to the speed command of the loading system to obtain the q-axis current command of the motor of the loading system; according to the actual output value of the loading system and the parameters of the loading system, the The q-axis current command is reversed to obtain the voltage input to the motor of the loading system; and an adaptive algorithm is used to update the parameters of the loading system during the voltage calculation process. The electric loading system in the present invention is controlled by an adaptive and robust control method, which can effectively cope with the impact of high and low temperature alternating environments on the performance of the motor, as well as the impact of external disturbances on the control accuracy of the loading system, and realize Precise displacement control of the loading system.

The invention discloses conical / cylindrical linear rollaway nest superfinishing equipment. The conical / cylindrical linear rollaway nest superfinishing equipment comprises an operating table and a material feeding and discharging conveying mechanism arranged on the operating table, wherein a big reciprocating and small vibrating mechanism, a rollaway nest superfinishing swinging head and a flange superfinishing swinging head are further arranged on the operating table; a feeding opening is formed in the middle of the material feeding and discharging conveying mechanism; a main shaft is arranged on the back side of the feeding opening; an inner hole centering component is arranged at the upper end of the main shaft; the big reciprocating and small vibrating mechanism comprises a big reciprocating mechanism and a small vibrating mechanism; the big reciprocating mechanism and the small vibrating mechanism are connected through a first connecting plate; a first skipping component is arranged on the back side of the rollaway nest superfinishing swinging head; a second skipping component is arranged on the back side of the flange superfinishing swinging head; both the rollaway nest superfinishing swinging head and the flange superfinishing swinging head are driven by the big reciprocating and small vibrating mechanism for superfinishing. The conical / cylindrical linear rollaway nest superfinishing equipment performs rollaway nest superfinishing and flange superfinishing at the same time, is simplex in rollaway nest superfinishing vibration and stable and reliable in working conveying, and can meet superfinishing requirements of a high-precision workpiece.