738 results about "Pneumatic actuator" patented technology

The invention discloses a fault monitoring sealing ball valve, belongs to the technical field of ball valves, and solves the problems that a self-adaptive compensation mechanism of an intelligent valve positioner can cover the degradation process of mechanical wear of a pneumatic sealing ball valve quietly during long-term operation, and finally sudden control instability is caused due to the fact that nonlinear wear exceeds a compensation limit. Comprising a valve body, a pneumatic actuator arranged on the valve body, a valve rod which is in transmission connection with an output shaft of the pneumatic actuator and located in the valve body, a valve ball fixedly connected with the valve rod and a fault prediction circuit. The fault prediction circuit comprises a multi-dimensional physical sensing array module, a high-speed synchronous acquisition and preprocessing module, a core signal processing and fusion analysis module, an artificial intelligence coprocessor module and a predictive maintenance decision and life cycle management module. Multi-dimensional signals are collected in real time, valve health is evaluated after fusion analysis, and early warning and maintenance decisions are output.

The invention provides a wearable tactile feedback adjusting device used for simulating material surface texture characteristics in real time in a mixed reality environment. The invention relates to a method. The device comprises a U-shaped pneumatic actuator surrounding the fingertip of a user, a fingerstall support for accommodating the fingertip of the user, a resonance actuator located on the fingerstall support and capable of generating vibrotactile feedback to enhance the perceived roughness when the user touches the surface of an object, and a pneumatic control system that can generate a pneumatic drive command to reduce roughness perception when touching the surface of the object. Notably, the fingertip and the finger pulp of the user can still directly touch the surface of the object and cannot be blocked by the U-shaped pneumatic actuator, so that the real texture simulation experience is realized.

The invention relates to the technical field of valves, and particularly discloses an intelligent pneumatic adjustment heating sealing butterfly valve which comprises a butterfly valve assembly, a pneumatic actuator, a temperature control unit, a control panel and a base. The pneumatic butterfly valve is characterized in that the butterfly valve assembly and the pneumatic actuator are fixedly arranged on the base, the base is provided with a frame type supporting structure, and the pneumatic actuator and the control panel are both contained in the frame type supporting structure; the butterfly valve assembly comprises an annular valve body arranged on the base, a valve rod rotationally arranged on the annular valve body and a circular butterfly plate fixedly connected to the valve rod and located in the annular valve body, one end of the valve rod is driven by a pneumatic actuator to rotate, and the other end of the valve rod is rotationally connected with the annular valve body; an annular groove and a sealing ring embedded in the groove are arranged on the periphery of the butterfly plate, the inner circle face of the annular valve body protrudes towards the butterfly plate to form an arc-shaped boss, the butterfly plate and the valve rod are located in an annular space of the annular valve body, and sealing is achieved when the butterfly plate rotates till the sealing ring abuts against the arc-shaped boss.

The present disclosure relates to systems, devices, and methods for automated fluid transfer. In an embodiment, the present disclosure relates to a system for fluid transfer between a fluid device and a cartridge for cell processing. The system comprises a first portion comprising an instrument head coupled to a gantry, the instrument head comprising a pneumatic actuator, a peristaltic pump, and a gripping feature for receiving the fluid device. The peristaltic pump may be configured to engage compressible fluidic tubing of a fluid pump module of the fluid device to transfer the fluid between the fluid device and the cartridge. The system further comprises a second portion comprising a docking station for receiving the cartridge. In some variations, movement of the pneumatic actuator relative to the fluid pump module causes occlusion of the compressible fluidic tubing of the fluid pump module by the peristaltic pump.

The invention discloses a pneumatic actuator remote intelligent monitoring system based on the Internet of Things, and relates to the technical field of actuator control. Traditional, quantum and biosensors are used for data acquisition, adaptive coding is adopted, transmission is combined with quantum encryption and ultra-wideband, quantum machine learning and causal inference are analyzed and applied, and remote control comprises brain-computer, holographic and intelligent agent technologies; naked-eye 3D and AR are used for visualization, system management depends on a block chain and a quantum key, and a self-repairing function is achieved. The advanced technology is creatively applied, data are comprehensively collected, transmission safety is guaranteed, faults are accurately analyzed and predicted, convenient remote control and visual display are achieved, system safety and stability are improved, and efficient operation of the pneumatic actuator is powerfully guaranteed.

The invention provides a self-adaptive cross damping flutter suppression method for blades of an offshore wind turbine, and belongs to the technical field of wind power generation based on computer data processing. The method comprises the following steps: firstly, establishing an aeroelastic model containing a non-diagonal damping item, and coupling sinking and floating motion and pitching motion through a cross damping coefficient; secondly, designing a self-adaptive control law based on a differential Riccati equation, and dynamically adjusting a damping parameter to compensate the time-varying aerodynamic force; and finally, proving closed-loop stability through a Lyapunov theory, and verifying a control effect by utilizing numerical simulation. An external pneumatic executing mechanism is not needed, the structure is simple, response is fast, the vibration convergence time can be shortened to be within 4 seconds at the wind speed of 8 m / s, the steady-state error approaches zero, and the method is suitable for flutter suppression of the blades of the large offshore wind turbine.

The invention relates to a surge protector withstand voltage test system and method, and belongs to the technical field of surge protectors, the system comprises a test tool, the test tool comprises a tool body, a pneumatic execution component and a PCB function board, the tool body is made of bakelite, metal handles are arranged on the two sides of the tool body, and a detachable cover plate is fixed to the bottom of the tool body through hinges and lock catches; a wiring groove is formed in the inner side of the cover plate; the pneumatic execution component comprises a double-piston cylinder, a slide rail, a clamp assembly and an elastic conductive elastic needle; the double-piston cylinder drives the clamp assembly to linearly move along the X direction through the slide rail so as to clamp the surge protector to be tested; the elastic conductive elastic needle is fixed on the clamp assembly, the head of the elastic conductive elastic needle is in elastic contact with an exposed contact of the tested surge protector, and the tail of the elastic conductive elastic needle is connected to the PCB function board through a wire; the PCB function board comprises a high voltage constant current source circuit, a multipath relay switching circuit and an MCU control module.

The invention discloses a pneumatic stop valve, belongs to the technical field of valves, and solves the problems that when the pneumatic stop valve acts once per minute at the temperature of 380 DEG C, a valve rod is oxidized and collapsed due to high-temperature filler, the valve rod is abraded by catalyst particles, the valve rod is slightly bent by 0.08 mm due to the pressure difference of 0.5 MPa, sealing and hiding of the valve rod are invalid, and closing lags. Comprising a valve body, a support installed on the valve body through a valve cover, a corrugated pipe fixedly connected into the support, a pneumatic actuator fixedly connected to the upper end of the support and a valve rod, the valve rod is connected into the corrugated pipe in a sliding mode, and the upper end of the valve rod is in transmission connection with the movable end of the pneumatic actuator. All the structures keep efficient sealing, the displacement direction of all the structures is limited, meanwhile, the displacement and strain data of the valve rod are monitored, the bending amount is calculated through multi-source data fusion for position compensation, and meanwhile the pneumatic execution module is controlled to complete S-curve optimized valve opening and closing actions.

The invention discloses a modified thermoplastic solid-solution anticorrosive coating, a preparation method thereof and application of the modified thermoplastic solid-solution anticorrosive coating on the surface of a pneumatic actuator, and belongs to the field of industrial equipment surface protection materials. Two novel modifiers are designed to construct a multi-protection system. Wherein the layered double hydroxide-silane covalent grafting modifier takes magnesium-aluminum layered double hydroxide as a matrix, and after covalent modification by a silane coupling agent, the matrix is compounded with a quinoline derivative in an intercalation manner, so that the interface bonding and barrier properties are improved; according to the polyaniline-graphene covalent grafting modifier, few layers of graphene and polyaniline are copolymerized and then grafted with a polyurethane prepolymer, so that the toughness and the conductive corrosion resistance of a coating are enhanced. The coating is prepared by taking polyethersulfone as a matrix, compounding the modifier, nano silicon dioxide and other components, mixing, dissolving, dispersing at a high speed and ultrasonically defoaming. The coating has the advantages of high interface adhesion, strong corrosion resistance, dynamic fatigue resistance, environmental protection, no solvent and the like, and is suitable for surface protection of key components such as a pneumatic actuator shell.

The improved pneumatic actuator comprises a first shell and a second shell which are detachably assembled together, and an inner cavity is formed after the first shell and the second shell are assembled; the air tap is arranged on the first shell and partially extends into the inner cavity; the device further comprises a driving rod, the driving rod extends into the inner cavity from one side of the second shell, the part, located in the inner cavity, of the driving rod is provided with a piston, the side, facing the second shell, of the piston is provided with a spring, and at least one end of the spring is arranged on an adjusting gasket. A diaphragm is arranged on the side, facing the first shell, of the piston, a sealed air cavity is formed between the diaphragm and the first shell, and the inner end of the air nozzle is communicated to the air cavity. According to the improved pneumatic actuator, the main shell is of a two-half type detachable assembly structure, the main shell can be conveniently disassembled to replace and adjust the internal structure, springs with different elastic coefficients can be conveniently replaced, and therefore the improved pneumatic actuator can be better matched with different operation target working conditions of a supercharger.

Systems and method describe an actuator control system for controlling an intelligent actuated nose bridge on a pair of wearable glasses. The actuator control system receives a set of measurement data corresponding to a length of the nose bridge, generates a predicted set of measurement data for the length of the nose bridge, transmits the predicted set of measurement data to pneumatic actuators coupled to the nose bridge, captures a first set of images of the nose bridge, generates an augmented set of measurement data for the nose bridge, generates an adjusted set of measurement data based on the predicted set of measurement data and the augmented set of measurement data, and transmits the adjusted set of measurement data to the pneumatic actuators coupled to the nose bridge.

A valve assembly for a pneumatic system of a vehicle, in particular a commercial vehicle, including: an outlet valve assembly for venting the pneumatic system, a control device for operating the valve assembly in order to admit and release air to and from a pneumatic actuator, wherein the control device is configured to output, to the outlet valve assembly, a switching signal for switching the outlet valve assembly, and, via the switching signal, the outlet valve assembly can be switched to a noise-reducing first venting mode or a quick-venting second venting mode.

The invention discloses an air supply method and an air supply system for a pulsating type ventricular assist device. The air supply method comprises the following steps: setting working parameters of the pulsatile ventricular assist device; the stroke range of the piston in the air pump is determined according to the working parameters; obtaining a piston position piecewise function based on the stroke range; the piston is driven to be at the working zero point, the air pump communicates with the pre-inflation equipment through the pre-inflation pipeline, the air pump is inflated through the pre-inflation equipment, and air pump pressure initialization is completed; and the pre-inflation equipment is disconnected, the air pump is communicated with the pneumatic execution part through the air supply pipeline, a piston in the air pump reciprocates according to the determined piston position piecewise function, the pressure in the air pump is periodically changed, and the pneumatic execution part is periodically and intermittently driven to work according to the sequence of inflation, high-pressure keeping, deflation and low-pressure keeping. The problem of air supply of a balloon, an extracorporeal membrane cavity and the like of an existing pulsatile ventricular assist device is solved.

The utility model relates to a buffer device of an actuating mechanism. The buffer device comprises a pneumatic actuator, a buffer block, an energy accumulator, a buffer shell, a buffer piston and a buffer spring, the pneumatic actuator comprises an actuator shell, an actuator upper cover, an actuator piston and an actuator push rod; the actuator piston can axially slide along the inner wall of the actuator shell; a plurality of actuator guide shafts are arranged between the actuator upper cover and the actuator piston; the actuator piston is fixedly connected with the actuator push rod; the buffer block is fixed to the lower end of the actuator shell, and a closed air storage space is formed between the buffer block and the actuator piston. The buffer block is provided with an exhaust port which can be controlled to be opened and closed; the actuator push rod penetrates through the buffer block and is in sliding fit with the buffer block; the buffer shell limits the maximum stroke of downward movement of the actuator piston. The buffer piston is annular and is arranged between the actuator push rod and the buffer shell in a sleeved mode, the upper portion of the buffer piston abuts against the actuator piston, the lower portion of the buffer piston is communicated with an oil discharge channel embedded in the buffer block, and the oil discharge channel is communicated with the hydraulic energy accumulator.

The invention provides a pneumatic driving part and a pneumatic valve, and relates to the technical field of valve control. The pneumatic driving piece comprises a front cover, a rear cover, a cavity and a piston piece; the first end of the cavity is connected with the front cover, the second end of the cavity is connected with the rear cover, the piston piece is arranged in the cavity, and the cavity is divided into a first inner cavity corresponding to the front cover and a second inner cavity corresponding to the rear cover based on a piston head of the piston piece; the piston piece is used for moving based on the pressure difference between the first inner cavity and the second inner cavity; the front cover is provided with a first one-way sealing piece, and the first one-way sealing piece is used for buffering the moving tail end, moving in the first direction, of the piston piece. The rear cover is provided with a second one-way sealing piece, and the second one-way sealing piece is used for buffering the moving tail end, moving in the second direction, of the piston piece. The first direction is the direction from the rear cover to the front cover, and the second direction is the direction from the front cover to the rear cover. And the movement tail ends of the piston piece in different directions can be buffered, and impact caused by inertia is effectively reduced.

The utility model discloses a quick exhaust gas circuit structure which comprises a pneumatic actuator, the pneumatic actuator is connected with a one-way valve, a pneumatic control valve and a shut-off valve, a second electromagnetic valve is arranged on the one-way valve, the one-way valve is connected with a three-way valve, and the three-way valve and the pneumatic control valve are both connected with a first electromagnetic valve and a filtering pressure reducing valve. When the air cylinder needs to be fed with air, the first electromagnetic valve is powered on, the air source passes through the first electromagnetic valve, the air control valve is controlled to be communicated with an air path, and the air source enters the filtering pressure-reducing valve to be subjected to pressure reduction, the first electromagnetic valve and the air control valve are in a closed state, and an interface 1 and an interface 2 in the three-way valve are used for ventilation, so that air cannot be fed at the moment; the first electromagnetic valve is powered on, and the air source passes through the first electromagnetic valve to control the air control valve to be communicated with the air path; an air source enters from the pneumatic control valve, the second electromagnetic valve is not powered on, and the one-way valve cannot flow back. The quick exhaust gas circuit structure is used for a single-action cylinder, realizes emergency opening and closing, and accelerates the exhaust time of the cylinder.

A positioner for a pneumatic actuator for actuating a control instrument, such as a control valve, of a process plant, may include an electropneumatic converter, such as a current-pressure converter; a circuit board which carries supply electronics for the electropneumatic converter a casing which comprises at least one electronics compartment in which at least one electronic component of the positioner, in particular the supply electronics, is accommodated, and a converter compartment, in which the electropneumatic converter is accommodated. The electronics compartment and the converter compartment may be spatially separated from one another. The converter compartment may be delimited at least partially by the circuit board.

The invention discloses a double-acting shifting fork type pneumatic actuator, and relates to the technical field of actuators. Comprising a box body and a rotating shaft, the rotating shaft is provided with a shifting fork with a sliding groove, the buffering assembly comprises a hollow buffering ring located between the rotating shaft and the shifting fork, and the buffering ring is fixedly connected with the shifting fork and is slidably connected with a pushing ring through a plurality of guide rods. The lubricating assembly comprises lubricating boxes located on the two sides of the sliding groove and provided with a plurality of extrusion holes, and extrusion boxes communicated with the extrusion holes and an adjusting assembly are arranged in the lubricating boxes. The adjusting ring is connected with the buffering ring in a sliding mode and fixedly connected with the guide rod, the extrusion box communicates with the buffering ring through a guide pipe, and vibration and abrasion of a shifting fork groove and a sliding block are reduced through impact force of multi-stage buffering fluid and lubrication.

The invention relates to a bidirectional sealing pneumatic butterfly valve which is mainly composed of a valve body, a valve rod, a butterfly plate, a valve seat, an air source, a pneumatic actuator and the like. A first air bag assembly is arranged in the butterfly plate, a second air bag assembly is arranged in the valve seat, the valve body is provided with an air connector communicated with an air source and the second air bag assembly, and the two air bag assemblies are communicated when the butterfly plate is closed. The air bag assembly is filled with high-pressure air provided by the air source, and bidirectional sealing of the butterfly plate and the valve seat is achieved. Meanwhile, cleaning paddles are arranged on the two sides of the butterfly plate, and fluid drives the butterfly plate to rotate to clean attachments on the butterfly plate when the valve is opened. The butterfly valve prevents frictional wear between the butterfly plate and the valve seat through air bag sealing, improves the sealing effect and prolongs the service life; the performance of the butterfly plate is guaranteed by cleaning paddles; the sealing performance can be recovered quickly, the structure is simple, installation and maintenance are convenient, practicability and economical efficiency are high, and the device is suitable for industrial pipeline system flow control and cut-off.

The invention relates to the technical field of vibration suppression, and discloses a multi-physics field cooperative control intelligent vibration suppression method and system, and the method comprises the following steps: S1, building a multi-physics field digital twinborn model based on a finite element analysis method, the multi-physical field at least comprises a coupling relationship among a pneumatic field, an electromagnetic field and a structural field, and the modeling of the fluid-structure interaction effect is included; and S2, based on the digital twin model, an improved particle swarm optimization algorithm is adopted to generate a control weight distribution scheme, and the control weight distribution scheme is used for dynamically adjusting the output proportion of a pneumatic actuator and an electromagnetic actuator. According to the method, the multi-physical field digital twinborn model containing the coupling relation of the pneumatic field, the electromagnetic field and the structural field and taking into account the fluid-solid coupling effect is established, so that the problem that the control precision is limited due to the fact that a single physical field control strategy is mostly adopted in a traditional vibration suppression method is solved.

The invention belongs to the technical field of valves, and discloses a single-action pneumatic actuator control system which comprises a gas supply gas circuit, a pneumatic pilot valve, a first electromagnetic valve, a pilot loop and a delayed discharge loop. And the delayed discharge loop is configured to discharge the air pressure in the control air cavity, and after a preset time, the air pressure is gradually reduced to be below a set value so as to cut off the pneumatic pilot valve. During power failure in a whole platform range, the time-delay discharge loop can enable the whole control system to automatically switch into a pure pneumatic time-delay mode, so that the situation that the BDV immediately enters an open state due to power loss of the first electromagnetic valve is avoided, and the environmental adaptability and long-term operation reliability of the control system under extremely severe environments such as an ocean platform and flammable and explosive environments are remarkably improved; the safety performance is improved.

A vacuum system comprises at least a pneumatic positioning device comprising a mount configured to hold an effecting element and a pneumatic actuator connected to the mount. A control valve is connected to the pneumatic actuator and to a fluid supply. A fluid sensor measures the pressure of the pneumatic actuator. A method includes applying a controlling signal to the control valve to vary the pressure of the pneumatic actuator and move the mount from a starting position to an end position, monitoring the pressure of the pneumatic actuator by the fluid sensor, determining when the mount arrives at the end position, and deriving the controlling parameters based on processing a set of observed parameters, wherein the set of observed parameters comprises at least the controlling signal, the varying pressure, and arrival information of the mount at the end position.

The utility model relates to the technical field of pneumatic control systems, in particular to a single-action pneumatic PST system, which comprises a pneumatic actuating mechanism, a cam valve and an explosion-proof junction box, a valve position transponder is arranged at the front end of the pneumatic actuating mechanism, one end of the cam valve is communicated with a filtering pressure reducing valve, one end of the filtering pressure reducing valve is communicated with a safety valve, and the other end of the filtering pressure reducing valve is communicated with an explosion-proof junction box. And one end of the explosion-proof junction box is connected with a first electromagnetic valve and a second electromagnetic valve respectively. According to the improved single-action pneumatic PST system, the first electromagnetic valve, the hand-operated direction valve and the second electromagnetic valve are adopted, and when the single-action pneumatic PST system is used, flexible control can be conducted when the single-action pneumatic PST system faces complex working conditions and different operation requirements; the explosion-proof junction box and the energy accumulator are adopted, when the single-action pneumatic PST system is used, the electrical safety of the system in a dangerous environment can be guaranteed, meanwhile, the pressure of the system can be kept within a relatively stable range, and the stability of the system during use is improved.

The invention provides a method for achieving deep energy-saving sealing through a sealing ring, and relates to the technical field of sealing elements. The sealing performance and the service life of the sealing ring under high-temperature, high-pressure and complex working conditions are remarkably improved and prolonged through key technical means of material composite modification, a multi-stage sealing structure, intelligent installation feedback and running state online monitoring. Graphene and ceramic micro powder are added into a silicone rubber base material, and a low-friction PTFE coating is sprayed, so that the durability and the self-lubricating property of the material are improved; the sealing ring main body adopts a double-lip structure to be matched with the central supporting ring, so that the compression resistance and buffering capability are enhanced; the pressure sensor and the image recognition module are integrated, intelligent feedback control in the installation process is achieved, and the intelligent pressure sensor has the advantages of being low in sealing leakage rate, capable of reducing energy consumption, long in service life and high in intelligent degree, is suitable for various industrial application scenes of hydraulic systems, pneumatic actuators, valves and pipeline connection and has good popularization value and industrialization prospects.

Systems and method describe an actuator control system for controlling an intelligent actuated nose bridge on a pair of wearable glasses. The actuator control system receives a set of measurement data corresponding to a length of the nose bridge, generates a predicted set of measurement data for the length of the nose bridge, transmits the predicted set of measurement data to pneumatic actuators coupled to the nose bridge, captures a first set of images of the nose bridge, generates an augmented set of measurement data for the nose bridge, generates an adjusted set of measurement data based on the predicted set of measurement data and the augmented set of measurement data, and transmits the adjusted set of measurement data to the pneumatic actuators coupled to the nose bridge.

The invention discloses a health degree estimation method for a pneumatic actuator. According to the invention, system identification is carried out at a stable working point and a discrete state space model is obtained. And comprehensively considering disturbance and excitation signals and the health condition of the actuator, and constructing a discrete state space expression form suitable for the augmented Kalman filter. The health information is modeled as an unknown input disturbance variable and is taken as part of a state variable. And an augmented Kalman filter is adopted to carry out combined prediction on the system state quantity and the unknown input interference quantity. And maintaining the acquired control input sequence and the unknown input disturbance variable sequence output by the filter by adopting a sliding window mechanism, and obtaining an estimated value of a health matrix of the pneumatic actuator by adopting a least square method for a data sequence in a window. And finally, performing feature extraction and analysis on the health matrix estimation value to realize real-time evaluation and dynamic tracking of the health state of the pneumatic actuator. According to the method, accurate, stable and real-time health degree information can still be provided under the condition that the pneumatic actuator has faults, disturbance or model mismatch, and powerful technical support is provided for fault-tolerant control and predictive maintenance of a complex system.

The utility model discloses a straight stroke pneumatic actuator for a lifting rod ball valve. A piston cavity is divided into an upper cavity and a lower cavity by a partition plate; a first upper cavity air source connector is formed in the upper cover in a penetrating mode, a first lower cavity air source connector is formed in the lower cover in a penetrating mode, and a second upper cavity air source connector and a second lower cavity air source connector are formed in the partition plate; the piston assembly comprises a piston rod, an upper piston disc and a lower piston disc, the upper piston disc and the lower piston disc are fixed to the piston rod, the upper piston disc is located in an upper cavity of the piston cavity and matched with the upper cavity in a sealed mode, the lower piston disc is located in a lower cavity of the piston cavity and matched with the lower cavity in a sealed mode, and the piston rod penetrates through the partition plate and the lower end of the piston rod extends out of the piston cavity. One end of the piston rod extending out of the piston cavity is a valve rod connecting end; the manual lifting mechanism is detachably connected with the upper end of the piston rod. According to the lifting rod ball valve, normal use of the lifting rod ball valve in emergency can be guaranteed through two different operation modes of pneumatic operation and manual operation.

A spacecraft with retractable solar sails is a spacecraft that is designed as a semi-autonomous spacecraft that can maneuver and propel using radiation pressure. The spacecraft includes a spherical hull and several propulsion mechanisms. The spherical hull houses the propulsion mechanisms, the payload, and other systems that enable the semi-autonomous operation of the spacecraft. The spherical hull also enables the semi-autonomous operation of the propulsion mechanisms. The propulsion mechanisms enable the propulsion and maneuvering of the spacecraft using radiation pressure in deep space. Each of the propulsion mechanisms includes a solar sail assembly, a sail receptacle, a pneumatic actuator, and a quantity of fluid. The solar sail assembly supports several retractable solar sails. The sail receptacle allows the retraction of the solar sail assembly into the spherical hull. The pneumatic actuator allows the deployment of the solar sail assembly. The quantity of fluid enables the operation of the pneumatic actuator.

The invention belongs to the technical field of pneumatic actuator control, and discloses a driving mechanism, an air cylinder driving method and a grabbing device. The driving mechanism comprises a first gas path, a second gas path, a gas source, a detection piece and a control assembly. The air pressure of the first cavity and the air pressure of the second cavity can be balanced through the control assembly, so that the piston can stop at any position in the air cavity, and the multi-point positioning device can be applied to complex working conditions with requirements for multi-point positioning. The driving mechanism is improved based on an air cylinder structure, and the characteristic that the cost of the air cylinder is relatively low is reserved. And meanwhile, the function of accurately positioning any position is also realized. In other words, under the condition that certain precision requirements are met, the multi-point positioning effect similar to that of a lead screw electric cylinder can be achieved, high cost input is avoided, and in the scene with low requirements for speed and precision, compared with the lead screw electric cylinder, the cost performance is higher.

The invention discloses a low-cost batch rapid automatic detection method and device for a miniature precise pneumatic actuator, and the device is small in size, is low in cost, is suitable for the batch detection of the miniature precise pneumatic actuator with the diameter of a pneumatic shaft smaller than 3mm, the maximum displacement smaller than 5mm, and the displacement speed of 1-1.5 m / s. And moreover, multiple specific displacement detection can be realized on one detection station, and meanwhile, the stability and accuracy of reliable detection are kept in a batch detection process.