40results about How to "Realize displacement control" patented technology

The invention relates to a device suitable for ring shear test and soil sample preparation of a vertical shearing surface. The device comprises a shearing box, a lifting system, a power rotating system, a monitoring control system, a soil sample preparation system and a frame, wherein shearing plates are uniformly fixed on an annular base plate along the radial direction of the annular base plate; an outer cover of the shearing box is covered on the annular base plate and the shearing plates and is assembled and fixed with the annular base plate through a guide strip and a guide slot; the outer cover of the shearing box is connected with a rotating force arm of the power rotating system and is used for transmitting torque; a coupling pressing plate is aligned and embedded into a central hole of a top plate of the outer cover of the shearing box and is driven by the lifting system to load normal force; the annular base plate is aligned and embedded into a cylindrical support platform; and under the effect of driving torque, an inner cylindrical side wall generated by the circling motion of the annular base plate under the driving of the shearing plates is the vertical shearing surface. According to the invention, the shearing displacement and the uniform distribution of the shearing stress on the shearing surface can be guaranteed, the thickness of the vertical shearing surface is not limited and the device has the functions of sample preparation and vertical shearing test.

The present invention provides an opening-type wind tunnel model test support device, belonging to the technical field of wind tunnel tests. The support device employs a 'link rod' mechanism, and independent motion of each support arm achieves angle and displacement control. The whole set of system employs hydraulic position servo and is formed by a Z-directional mechanism and a variable angle mechanism. The Z-directional mechanism is formed by a pedestal, a support, a hydraulic cylinder, a pulley and a guide rail, and the hydraulic cylinder achieves Z-direction displacement through guidance push of the pulley by the guide rail. The variable angle mechanism is formed by a model support rod, a fixing support arm, three movable support arms, six dual-action single-pole piston hydraulic cylinders, and can achieve conversion of a pitch angle and a yaw angle. Through correlated effects and mutual monitoring of four subsystems, the opening-type wind tunnel model test support device is high in control system anti-interference capability, can greatly improve the precision and the reliability of the monitoring system, is free and flexible in set of control parameters and can meet the various control requirements.

The invention discloses a high embankment slope stabilizing structure. The high embankment slope stabilizing structure comprises a retaining wall, steel pipe piles and anchor rods; the retaining wallis arranged at the foot of a high embankment slope, concrete-filled steel pipe piles are arranged on the inner surface of the retaining wall, an excavation step and a gravel drainage zone are arrangedat a filling and excavation interface, the bottoms of the concrete-filled steel pipe piles and the steel pipe piles penetrate through the gravel drainage zone, and the upper sections of the steel tube piles are sleeved with grouting sleeves correspondingly; the lower end of the grouting sleeves extend to the gravel drainage zone, the upper end of each grouting sleeve is connected with a groutingopening through a grouting pipe, a fixed pulley and a pipeline channel are arranged inside each concrete-filled steel pipe pile, the anchor rods are is fixed in a rock stratum behind the excavation step, the exposed parts of the tops of the anchor rods are connected with steel strands, and the steel strands are connected to the fixed pulleys or the steel pipe piles at the same height; the steel strands connected to the fixed pulleys are led out of crown beam through the pipeline channel and connected with a steel strand tensioning device. The high embankment slope stabilizing structure is suitable for reinforcing and active control of embankment deformation in the embankment construction and operation process, and is particularly suitable for embankment projects with high requirements forembankment stability and later operation safety.

The invention relates to the technical field of civil engineering, in particular to a foundation pit supporting structure and a construction method thereof. The structure comprises steel plate piles which are oppositely arranged, and supporting pieces fixed between the steel plate piles; and the supporting pieces are of a splicing structure and are adjustable in length. According to the foundationpit supporting structure, the supporting piece with the adjustable length is arranged so that the supporting piece can automatically control the axial force of the supporting piece, displacement control of the foundation pit supporting structure can be achieved according to the deformation of a foundation pit, and a relatively wide application range is achieved; and in addition, the supporting piece of the splicing structure can avoid the welding process in the construction process, so that the construction process is simple, and the material utilization rate is high.

The invention discloses a pushing system and method for a PLC multipoint synchronous three-dimensional hydraulic bridge. The pushing system comprises a pushing monitoring system and multiple groups ofwalking-type three-dimensional hydraulic pushing devices for pushing pushed steel box beams, and each pushing buttress is provided with a left temporary supporting base and a right temporary supporting base which are symmetrically distributed. The pushing method includes the steps of 1, constructing assembly jig frames and temporary buttresses; 2, constructing a three-dimensional adjusting device, the pushing devices and the temporary supporting bases; 3, carrying out steel-box-beam assembling and synchronous pushing; 4, carrying out steel-box-beam pushing. According to the pushing system andmethod for the PLC multipoint synchronous three-dimensional hydraulic bridge, steel box beams are synchronously pushed forwards multiple times through the multiple groups of walking-type three-dimensional hydraulic pushing devices, pushing controlling is easy and convenient, synchronous action of the multiple groups of walking-type three-dimensional hydraulic pushing devices can be easily and conveniently achieved, pushing positions are flexibly distributed, guide beams and sliding rail beams for longitudinal pushing are not required, self-balancing pushing is really achieved, and the pushingprocess is safe and reliable.

The invention discloses a steel box girder incremental launching construction method based on walking type three-dimensional hydraulic incremental launching equipment. The two ends of a construction steel box girder are each supported on a girder end pier, and the construction steel box girder is divided into a first girder body and a second girder body with a midspan pier being the boundary; incremental launching construction includes the steps that 1, temporary piers and midspan temporary piers are constructed; 2, incremental launching is conducted on the girder bodies synchronously throughthe walking type three-dimensional hydraulic incremental launching equipment; 3, midspan closing is conducted. The walking type three-dimensional hydraulic incremental launching equipment is adopted for conducting incremental launching on the two girder bodies synchronously until the two girder bodies of the constructed steel box girder are closed from two sides to the midspand; incremental launching of the walking type three-dimensional hydraulic incremental launching equipment is easy and convenient to control, multiple sets of walking type three-dimensional hydraulic incremental launching equipment can easily and conveniently act synchronously, incremental launching positions are arranged flexibility, a guide beam and a slideway beam used for longitudinal incremental launching are not needed, self-balance incremental launching is really realized, and the process of incremental launching is safe and reliable.

The invention discloses an automatic detection device for elevator guide rails, comprising a base, a first chute is formed on the base, a first rack is formed in the first chute, and a first gear is arranged on the bottom plate , the first gear is meshed with the first rack, the bottom plate is provided with a second chute, the second chute is provided with a second gear, and the bottom of the detection plate is formed with a hole parallel to the second chute. The second rack, the second rack is meshed with the second rack; the first gear is fixedly inserted on the first rotating shaft, one end of the first rotating shaft is fixedly connected to the output shaft of the drive motor, and the other end An external spline part is formed, and a first bevel gear with an internal spline hole in the center is inserted into the external spline part, and the second gear is fixedly inserted on the second rotating shaft, and the second rotating shaft is fixed A second bevel gear is plugged in. The invention has simple structure and reduces production cost.

The invention belongs to the technical field of testing, and relates to an impedance adjuster used for multi-parameter measurement of a microwave network under a microwave large signal state. The whole machine of the impedance adjuster consists of a microwave main body, a control unit, a display unit, a key, a drive unit, a photoelectric detection feedback unit, an external control computer, a standard external control interface and a precision The mechanical transmission part is composed. According to the principle of adjusting impedance in parallel, the impedance adjuster is connected in parallel to the flat coaxial transmission line through the admittance slider. The automatic control based on the high-performance microprocessor cooperates with the precision stepping motor and the precision mechanical transmission device, which can accurately realize the The displacement control of the admittance slider completes precise and small controlled displacement in the horizontal and vertical directions, and realizes precise impedance adjustment with a maximum reflection coefficient modulus of 0.875 and a repeatability better than 40dB.

The invention provides a linear compressor and a position detection method. The linear compressor comprises a shell, a piston and an air cylinder, wherein the piston and the air cylinder are arranged in the shell. The piston is arranged in the air cylinder in a sliding manner. An exhaust valve and an air cylinder cover are arranged on the air cylinder. The linear compressor further comprises a position detection assembly. The position detection assembly comprises a detection magnetic body and detection coils. The detection magnetic body is fixed to the exhaust valve. The detection coils are arranged on the air cylinder cover. The detection magnetic body and the detection coils are arranged oppositely. In the reciprocating motion process of the piston, the distances of the piston close to the exhaust valve are different, impacting force of different degrees is generated to the exhaust valve, and therefore the opening degrees of the exhaust valve are different; the distance between the detection magnetic body and the detection coils is changed, and therefore induced electromotive force values generated by the detection coils are different; and according to the induced electromotive force values generated by the detection coils, displacement of the piston can be calculated, position detection accuracy of the linear compressor is improved, and use reliability is improved.

The invention discloses a self-adaptive dynamic surface control method based on RBF neural network compensation, and the method comprises the steps: firstly guaranteeing the convergence and robustness of a proposed control scheme for the external time-varying disturbance of a primary permanent magnet linear motor through employing a backstepping method according to the Lyapunov stability theory; moreover, solving the problem of differential expansion in backstepping control by introducing an instruction filter, and finally,compensating unmodeled load disturbance suffered by the primary permanent magnet linear motor through an RBF neural network, so that the displacement control of a closed-loop signal of the primary permanent magnet linear motor can be achieved, and meanwhile, the robustness of the provided control method for parameter uncertainty is ensured.

The invention relates to a detection device for detecting the bonding strength of a wet base surface and a detection method thereof. The device comprises a double-arm type universal testing machine, wherein a lower end of a lower cross beam of the double-arm type universal testing machine is connected with a lifting rod for lifting a to-be-tested material , a lower end of the lifting rod is of a hollow structure, a first bolt hole is transversely formed in the lower end of the lifting rod, a fixing frame is fixedly connected with the portion, below the double-arm type universal testing machine, of a workbench, a standard-size concrete plate is installed on a lower-layer plate of the fixing frame, a test piece is formed on the concrete plate and the test piece, a drawing connector is bondedto a forming face of the test piece through high-strength bonding agent, and a second plug pin hole is formed in an upper end of a drawing rod. The device is advantaged in that the device is simple in structure, convenient to use, controllable in loading speed and force and accurate in detection.

The invention discloses an underwater low-resistance pile foundation low-strain dynamic monitoring device. A driving hammer and a stress wave receiving probe are integrated into a stress wave generation receiving device, and meanwhile automation of falling and lifting of the driving hammer is achieved; the stress wave generation receiving device is fixed to the top of a pile foundation through the combination of a balancing weight and a fixing device, an adhesive gluing gelatinous layer is arranged at the lower end of the stress wave receiving probe, and water passages are formed between the outer wall of a pushing and pressing chamber and the inner wall of a shell and between the outer wall of the pushing and pressing chamber and the inner wall of a waterproof separating layer respectively to be used for reducing water resistance. The underwater low-resistance pile foundation low-strain dynamic monitoring device has the advantages that the device can be used in deepwater high pressure environments; the driving hammer and the detection probe are combined, so that manual work is saved, and the water resistance is small during knocking through the driving hammer.

The invention discloses a low-strain dynamic monitoring device for an underwater pile foundation. A driving hammer and a stress wave receiving probe are arranged in a stress wave generating and receiving device together, the driving hammer can be released and retracted automatically, the stress wave generating and receiving device is fixed to the top of the pile foundation through the combination of a balance weight and a fixing device, an attaching colloidal matter layer is arranged at the lower end of the stress wave receiving probe, an openable water resistant door is arranged on the lower portion of a left cavity, rubber is arranged on the lower surface of the water resistant door, and when a pile is pressed by the stress wave generating and receiving device, a frame block presses the pile to achieve sealing together with a pile cap and then the water resistant door is opened. In this way, the left cavity contains no water all the time, and knocking effect can not be affected by friction between the driving hammer and water when the driving hammer falls down. A length adjuster is arranged to adjust the stretching length of the fixing device so that the low-strain dynamic monitoring device can be adapted to underwater pile foundations with different pile diameters.

The invention discloses an intelligent maintenance automatic lifting and shifting device. The intelligent maintenance automatic lifting and shifting device comprises a track, a moving device is movably mounted in the track, a first motor is fixedly mounted in the moving device, a first bevel gear is fixedly mounted at the output end of the first motor, the first bevel gear is engaged with a secondbevel gear, a first transmission rod penetrates through the circle center of the second bevel gear, a wheel is fixedly mounted at one end of the first transmission rod, the second bevel gear is engaged with a third bevel gear, a second transmission rod penetrates through the circle center of the third bevel gear, a control assembly is fixedly mounted in the moving device, a brake box is fixedly mounted in the moving device, and a first gear is movably mounted in the brake box. The intelligent maintenance automatic lifting and shifting device is compact in internal structure, high in integration level, simple in overall structure combination and convenient to assemble and maintain, and high-precision displacement control is effectively achieved for common large machines.

The invention discloses a dust-fall type crushing structure for microbial preparation particles. A fixing support is fixedly connected to an installation port, a second support is fixedly connected to the bottom end part of a grinding box, the fixing support and the second support are connected through a hydraulic driving cylinder, a first support is fixedly connected to the top end part of the grinding box, the fixing support and the first support are connected through a spring, and a telescopic pipeline is connected to a charging port; and a second clamping ring is fixedly connected to the bottom end part of the telescopic pipeline, the second clamping ring and the second support are fixedly connected, a first clamping ring is fixedly connected to the top end part of the telescopic pipeline, and the first clamping ring is fixedly connected with the fixing support. According to the invention, the problem that the microbial preparation particles are powdery and are extremely easy to disorderly disperse and attach to the interiors of a degradation box and the grinding box, is solved.