292results about "Using fluid means" patented technology

The invention discloses a plunger piston shoe assembly inner contour measuring method, device and equipment and a storage medium, liquid is added into an inner contour space of a plunger piston shoe assembly, the liquid adding amount in the inner contour space and the pressure in the inner contour space are obtained, and the mapping relation between the liquid adding amount and the pressure is established, the inner contour space comprises a gap between the wrapping and pressing part and the ball head part, a ball head hole and a wrapping and pressing hole; a first area and a second area in the mapping relation are obtained, the first area is used for representing the relation between the liquid adding amount and the pressure when a part of the gap and the ball head hole are filled with liquid, and the second area is used for representing the relation between the liquid adding amount and the pressure when the other part of the gap is filled with the liquid; and establishing a coordinate system, and calculating the inner contour of the wrapping and pressing part according to the physical properties of the liquid, the first region and the second region. According to the method for measuring the inner contour of the plunger piston shoe assembly, the inner contour of the wrapping and pressing part of the plunger piston shoe assembly can be nondestructively detected.

The invention discloses a plunger piston shoe assembly inner contour measuring method, device and equipment and a storage medium, the plunger piston shoe assembly inner contour measuring method comprises the following steps: filling the inner contour space of a plunger piston shoe assembly with liquid; liquid in the inner contour space is discharged, the liquid discharge amount in the inner contour space and the pressure in the inner contour space are obtained, and the mapping relation between the liquid discharge amount and the pressure is established; a first area and a second area in the mapping relation are obtained, the first area is used for representing the relation between the liquid discharge amount and the pressure when the liquid in one part of the gaps and the liquid in the ball head hole are discharged, and the second area is used for representing the relation between the liquid discharge amount and the pressure when the liquid in the other part of the gaps is discharged; and establishing a coordinate system, and calculating the inner contour of the wrapping and pressing part according to the physical properties of the liquid, the first region and the second region. According to the method for measuring the inner contour of the plunger piston shoe assembly, the inner contour of the wrapping and pressing part of the plunger piston shoe assembly can be nondestructively detected.

The invention discloses grouting body surface roughness measuring equipment and a measuring method, and the equipment comprises a sample forming device which comprises a sample forming box; the liquid injection device comprises a liquid injection container and a connecting pipe, the two ends of the connecting pipe are connected to the sample forming box and the liquid injection container respectively, and first liquid is loaded in the liquid injection container; the measuring device comprises a measuring container and a balance, the balance detects the weight change of the measuring container, and the measuring container is filled with second liquid; and the cooling device is connected with the sample forming box and transmits cold energy. By injecting the first liquid and adopting a cooling condensation mode, the process of actual grouting and waiting for slurry solidification is simulated, the condensation time is shorter so as to save the experiment time, and after the experiment, the sample can be heated to be melted and recycled, the experiment can be repeated for multiple times, and the waste of materials in the experiment process is reduced. Moreover, the second liquid is used for replacing traditional sand, and the second liquid can flow into various tiny gaps, so that the detection precision is higher.

The invention discloses a stator oil hole detection device based on air flow change and a detection method thereof, and aims to provide an efficient, accurate and reliable stator oil hole detection device based on air flow change and a detection method thereof. An oil hole detection device is arranged above the workbench, and a conveying device used for conveying a to-be-detected piece to a detection position is arranged below the workbench. The oil hole detection device comprises a rotating support arranged on the workbench, detection assemblies symmetrically distributed at the two ends of the rotating support, a driving assembly driving the rotating support to rotate, clamping air cylinders evenly and symmetrically distributed in the four directions of the rotating support, and air pressure detection pieces arranged on the clamping air cylinders. The detection assembly comprises a guide disc arranged on the rotating support and a plurality of plug pins evenly distributed on the guide disc, and the rotating support is provided with a displacement groove enabling the plug pins to act synchronously to be inserted into the oil holes. The method is suitable for the technical field of stator oil hole detection.

The invention provides a high-precision optical microcrystalline glass analysis system, and belongs to the technical field of microcrystalline glass detection. Wherein the detection core is arranged in the cylinder body in a sliding fit manner. The sleeve is connected with the detection core. One end of the driving rod is in sliding fit with the sleeve, and the other end is in transmission fit with the second driver. And a first elastic piece is abutted between the driving rod and the sleeve. The liquid storage pipe is arranged in the vertical direction, and the barrel is communicated with the liquid storage pipe. During detection, the controller is used for controlling the first driver to drive the barrel to be close to the objective table, so that the distance between the detection core and the objective table is a first preset distance. The controller is also used for determining the distance between the detection core and the surface of the glass-ceramic standard component according to the first preset distance and the thickness of the glass-ceramic standard component, and recording the distance as a standard distance. The controller is further used for controlling the second driver to drive the detection core to move towards the objective table by a second preset distance, and the second preset distance is larger than the standard distance. On the basis of guaranteeing the detection precision, the structure simplification and the low cost are realized at the same time.

Apparatus for determining a needle size including a phacoemulsification probe having a distal tip. The probe has an aspiration channel that transfers aspiration fluid from the distal tip and that has a first pressure sensor coupled with the channel, and an irrigation channel that transfers irrigation fluid to the distal tip and that has a second pressure sensor coupled with the channel. A needle-sleeve combination, consisting of a sleeve coaxially surrounding the needle, is coupled with the probe distal tip. A processor acquires from the first pressure sensor a first pressure profile of the aspiration fluid passing the first pressure sensor and acquires from the second pressure sensor a second pressure profile of the irrigation fluid passing the second pressure sensor. The processor formulates a difference between the two profiles, and determines the size of the needle of the needle-sleeve combination in response to the difference.

The invention belongs to the technical field of medical instrument evaluation, particularly relates to a tendon cross-sectional area measuring device and a tendon cross-sectional area measuring method, and provides the tendon cross-sectional area measuring device and the tendon cross-sectional area measuring method on the basis of a volumetric method and a die forming technology. The long and thin cylindrical measuring cylinder is used for containing normal saline, the pressure sensor is used for measuring the hydraulic pressure change caused by the fact that the tendon is immersed in the normal saline, then the liquid volume change is obtained, and the average cross sectional area of the tendon under the corresponding displacement is obtained based on the displacement of the tendon immersed in the liquid. Further, the minimum point of the tendon cross section area is accurately measured, and a reference is provided for a later tensile test.

The invention discloses high-precision automatic detection equipment and method for the collapse amount of an upper cover of a battery pack of a new energy automobile. The equipment comprises a rack, a detection platform, a profiling positioning block, a pressing mechanism, an operation unit and a pneumatic displacement sensor. The sensor consists of a fixed seat, a pneumatic unit and a contact piece with a magnet, wherein the magnet is adsorbed and fixed with a steel block on the fixed seat. The method comprises the following steps: matching and positioning the upper cover of the battery pack through the profiling positioning block, acquiring product identity information by the code scanning unit, clamping a workpiece by the pressing mechanism, enabling a contact piece of the pneumatic displacement sensor to be in contact with the surface of the upper cover, converting the sinking amount into an air pressure signal and detecting, and finally binding and storing the sinking amount and the identity information. According to the invention, rapid workpiece positioning, stable clamping and high-precision detection are realized, and the requirements of battery pack upper cover collapse amount full detection and data tracing in automatic production are met.

A measuring nozzle arrangement 2 of a pneumatic measuring device for measuring, in particular, shaft-shaped workpieces 38 has measuring nozzles 16 to 20, 36 arranged on a carrier element 4 to 14 and an adjusting device 28 for adjusting the carrier elements 4 to 14 relative to one another. According to the invention, the measuring nozzle arrangement 2 has at least four carrier elements 4 to 14 with measuring nozzles 16 to 20, 36, which are arranged in pairs diametrically opposite one another (4, 6 or 8, 10 or 12, 14) relative to an axis 22, which defines a radial direction and a circumferential direction, and are adjustable in the radial direction, wherein the adjusting device 28 is designed and constructed for the radial adjustment of the carrier elements 4 to 14 into different measuring positions of the measuring nozzles 16 to 20, 36.

The utility model provides an efficient double-diameter synchronous comprehensive measuring instrument, which relates to the technical field of measuring instruments and comprises a supporting seat, a convex cover plate is fixed and communicated to the top of the supporting seat and close to the center, a square groove is formed in one side wall of the convex cover plate and close to the top, inner diameter grooves are symmetrically formed in the inner wall of the square groove, and the inner diameter grooves are communicated with the convex cover plate. The two side walls of the convex cover plate are each fixedly provided with four measuring heads, one end of each measuring head is provided with a first spray head in an embedded mode, an air source device is arranged in the supporting base, the top of the air source device is fixedly communicated with a connecting pipe, and the top of the connecting pipe is fixedly connected with a convex box; according to the utility model, the part is embedded into the inner diameter groove and the measuring head, and then the first nozzle and the second nozzle are used for spraying gas, so that the inner diameter and the outer diameter of the part can be synchronously measured, the use and the operation are simple, the measurement is convenient, the size of the part is out of tolerance, the out-of-tolerance can be displayed on a screen of a pneumatic gauge, and visual fatigue is avoided; and quality control is facilitated.

The invention discloses a five-axis linkage machining center geometric accuracy comprehensive detection device and method, the detection device comprises a reference cube, a rotating shaft installation module, a fine adjustment mechanism and an integrated detection unit, the reference cube is a hollow cube made of granite or marble, and a through hole is formed in the left side of the reference cube along the symmetric center line; the rotating shaft mounting module comprises a connecting sleeve, a fixing sleeve and a plurality of locking screws; the fine adjustment mechanism comprises a plurality of fastening screws; the integrated detection unit comprises a first gradienter which is fixedly connected to the upper plane of the reference cube in the same plane and a second gradienter which is fixedly installed on the right plane of the same reference cube in the same plane. According to the invention, seven key geometric accuracies of the five-axis linkage machining center can be detected through one-time clamping and debugging, specifically, the seven key geometric accuracies comprise the planeness of the axis guide rail, the straightness of the three moving axes and the perpendicularity among the three moving axes, and the detection efficiency and the detection accuracy are remarkably improved.

The present invention relates to a wearable device system designed to enhance child safety and management in recreational environments such as amusement parks and trampoline parks. The system comprises a rechargeable bracelet equipped with GPS for real-time location tracking, LED indicators, and haptic feedback for communication. The bracelet is complemented by a charging bin with Qi-standard compliant wireless charging coils and safety features. The system supports various wireless communication technologies and includes software for monitoring and managing device features, establishing virtual fences, and summoning wearers to designated locations, thereby improving operational efficiency and user safety.

The invention relates to the technical field of film laminating devices, in particular to a packaging material film laminating device which comprises a device body, the device body comprises a device frame, raw material rollers and product rollers are installed on the device frame, the raw material rollers comprise a paper roller and a film laminating roller, and the packaging material film laminating device further comprises a gluing assembly and a lining roller which are installed on the device frame. A smoothness tester is mounted on the device frame, the smoothness tester is provided with a detection viewport, the detection viewport faces a product route and faces one side with a film, the smoothness tester is connected with a control device and can transmit tested data to the control device, and the numerical value is a flatness roughness numerical value; and when the flatness roughness value obtained by the control device is greater than a certain value, the control device starts the first sliding motor, so that the raw material is coated with a thicker glue solution layer. The device has the advantages of being capable of automatically adjusting flatness and convenient to use. The invention further provides a packaging material film covering method.

The utility model provides a water flowing fractured zone detection device, which comprises a water pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water inlet pipe, a water outlet pipe, a water outlet pipe and a water outlet pipe, and the water inlet pipe is sequentially provided with a water inlet section and a water outlet section; the bag is arranged on the periphery of the water pipe in a sleeving manner, and the radial size of the bag is variable, so that the bag can be attached to the inner wall of the detection hole to block the detection hole; the adjusting pipe is used for injecting a medium into the bag so as to change the radial size of the bag; the temperature sensing optical fiber is provided with a testing section, the testing section is provided with a plurality of temperature measuring points at intervals in the length direction of the temperature sensing optical fiber, and the temperature sensing optical fiber can detect the temperature in the detection hole; the host is electrically connected with the temperature sensing optical fiber, and the host can receive detection data of the multiple temperature measuring points and calculate the height of the water flowing fractured zone according to the detection data. According to the technical scheme provided by the utility model, the problems of complex structure and tedious detection operation of the height detection device for the water flowing fractured zone in the prior art can be solved.

The application relates to the technical field of machining detection, in particular to a rapid testing fixture for clamp precision detection, which comprises a rack, a main shaft assembly, a conversion assembly and a coaxiality detection device, the rack is provided with a sealed cavity, the main shaft assembly penetrates through the cavity, can rotate around the own axis and move axially, the conversion assembly is connected with the main shaft and a detection assembly, the detection assembly is composed of a detection tool shank and a detection clamp sleeve, the tool shank is provided with an inner hole structure in the inside and is provided with a rotary precision adjusting structure, a limiting structure which can be axially driven and locked is arranged between the tool shank and the clamp sleeve, the conversion assembly is provided with a coaxiality correction mechanism and an assembly precision detection mechanism, and can be respectively used for correcting the coaxiality of the detection assembly and detecting the assembly precision, and the coaxiality detection device is used for detecting the radial runout of the inner hole of the tool shank and the detection clamp sleeve; the testing fixture can be used independently of the numerical control machine tool, does not occupy the machine tool production resources, can quickly complete the clamp precision detection, and effectively improves the detection and production efficiency.

The utility model relates to a mechanism for detecting the clearance degree of a core sleeve. The measuring device comprises a measuring ring which can be matched with a mandrel to be measured in an inserted mode. The shaft supporting device is arranged on the workbench and located beside the measuring ring, and the shaft supporting device is used for supporting a mandrel to be measured and enabling the mandrel to be measured to be coaxial with the axis of an inner hole of the measuring ring; the center positioning device comprises a supporting device and a jacking device, the supporting device comprises a lower center shaft which is coaxial with the measuring ring, the lower center shaft can move along an inner hole of the measuring ring and is supported at the lower end of the mandrel to be measured, and the jacking device is used for jacking the upper end of the mandrel to be measured; and the measurement driving device is used for driving the center positioning device to move so as to enable the mandrel to be measured to move to different positions along the inner hole of the measuring ring. According to the utility model, the detection error is reduced, and the accuracy of the detection result is improved.

The utility model relates to a deep well sampling device for water resource survey, which belongs to the field of water resource survey and comprises a collecting and releasing assembly and a sampling assembly, the collecting and releasing assembly comprises a rotating cylinder and a support frame, the rotating cylinder is arranged on the support frame, and a caliper rope is wound on the rotating cylinder. According to the deep well sampling device for water resource exploration, the heavy hammer and the magnet are held in the hand, the closed sampling barrel is put into a deep well through the retracting and releasing assembly, the depth of the sampling barrel put into water is monitored through the water pressure sensor, when the sampling barrel is put into the designated depth, the heavy hammer is put down, and the housing and the sampling barrel can move downwards under the action of falling gravity; the water inlet is opened, water can enter the sampling barrel, then the magnet is put down and falls to the top of the limiting ball, the heavy hammer can be attracted up from the top of the housing, the sampling barrel can return to the original position to seal the water inlet, and therefore underground water at the specified depth can be accurately sampled.

This invention relates to the field of power system safety assurance technology, specifically providing a circuit breaker with operation monitoring function and its monitoring method. The circuit breaker includes: a circuit breaker spring, a base housing fixed to one end of the circuit breaker spring, a deformation assembly, a transmission assembly, and a detection assembly within the base housing. The deformation assembly visualizes the minute deformation generated by the spring and generates relative displacement. The transmission assembly uses a lever amplification method to transmit the displacement to the detection assembly. The detection assembly includes a piston and a MEMS pressure sensor. One end of the piston is connected to the transmission assembly, and the other end is movably sealed within a closed space, where the MEMS pressure sensor is located. This invention effectively converts the minute deformation of the circuit breaker spring into changes in air pressure, introducing a MEMS pressure sensor to achieve high-precision monitoring. It possesses strong anti-interference capabilities, meets the requirements of low false alarms and zero calibration, reduces operation and maintenance costs, and offers high monitoring accuracy and reliability.

To provide a tank inspection method with which water injected into a tank during inspection can be efficiently discharged.SOLUTION: A tank inspection method TIM includes a support step P1, a water injection step P2, a pressure increase step P3, and a water discharge step P4. The support step P1 includes supporting a tank while crossing a central axis with a horizontal plane so that openings provided at both ends in a direction along the central axis of the tank are an upper opening and a lower opening. The water injection step P2 includes injecting water into the tank from the lower opening of the tank and exhausting air inside the tank from the upper opening. The pressure increase step P3 includes increasing the water pressure inside the tank to a predetermined pressure by pressure-feeding water to the lower opening in a state where an upper valve for opening and closing an upper channel connected with the upper opening is closed. The water discharge step P4 includes discharging water from the lower opening of the tank.SELECTED DRAWING: Figure 2

The utility model provides coal seam creep monitoring equipment which comprises a creep monitoring sensor, a liquid injection module and a metering module which are arranged in a coal seam, the creep monitoring sensor comprises a flexible expansion rubber pipe, a circular end protection plate and an axial displacement limiting connecting rod, and a liquid inlet and a liquid outlet are formed in the circular end protection plate; the internal creep state of the coal seam is indirectly reflected by monitoring the deformation of the flexible expansion rubber pipe, the difficulty of direct measurement is ingeniously avoided, the rigidity of the flexible expansion rubber pipe is obviously lower than that of the coal seam, the real creep process of the coal seam reaction is ensured by utilizing a low-rigidity structure, and the flexible expansion rubber pipe is tightly attached to the hole wall through a liquid injection expansion mechanism of the flexible expansion rubber pipe; the coal seam creep monitoring device is simple in structure, high-precision liquid discharge amount monitoring is matched, the coal seam creep situation can be obtained in real time, the defect that a traditional method cannot monitor internal creep of a coal seam is overcome, the special requirement of creep monitoring for the rigidity of the sensor is met, and a brand new technical means is provided for early warning of rock burst induced by creep.

The application discloses a floating type offshore platform pontoon camber detection device and relates to the technical field of pontoon camber detection devices. The device comprises a mounting cover, an air pressure sensor, a temperature sensor and a battery pack are mounted on the inner wall of the mounting cover, the battery pack supplies power to the air pressure sensor and the temperature sensor respectively, a magnetic force suction disc is fixedly connected to the bottom end of the mounting cover through a transition net, the air pressure sensor and the temperature sensor are connected with a signal transmitter through data transmission cables respectively, and water-insoluble gas is injected into the mounting cover through a gas delivery pipe. The device has the beneficial effects that: after the mounting cover is adsorbed to the pontoon through the magnetic force suction disc, water-insoluble gas is injected into the mounting cover, so that a stable environment is formed in the pontoon and the internal and external pressure of the pontoon is kept consistent, the pressure is different at different depths underwater, the air pressure data in each mounting cover is transmitted, the pontoon camber is detected, the camber data is detected, and the device is convenient to operate and flexible to use.

The invention belongs to the technical field of angle measurement, and discloses a compact coal mining machine rocker arm angle measuring device based on liquid level sensing, which comprises a closed pipe, a capacitive sensor, a signal processing unit and a main control system, the closed pipe is fixed on a vertical panel of a rocker arm of the coal mining machine, capacitive sensors are symmetrically arranged on the outer side wall of the closed pipe, the capacitive sensors are electrically connected with the signal processing unit, and the signal processing unit is in communication connection with the main control system. According to the technical scheme, stable and reliable monitoring is achieved in swing angle detection of the rocker arm of the coal mining machine, and the actual requirements under the underground operation environment are met.

The invention discloses a pneumatic measurement system for slide valve core edge processing quality detection, and the system comprises a pneumatic measurement module which collects the pneumatic measurement data of the slide valve core edge, and transmits the data to a data processing and analysis module; the optical measurement module performs optical measurement on the size and the surface quality of the edge of the valve core of the slide valve and transmits optical measurement data to the data processing and analyzing module; the motion control module controls a pneumatic measuring head of the pneumatic measuring module to move along the axial direction of the spool of the slide valve so as to ensure that the pneumatic measuring head performs full-coverage scanning on the edge of the spool of the slide valve in the detection process; and fusing pneumatic measurement data, optical measurement data and motion control data, and carrying out defect identification and quality evaluation based on a deep learning algorithm. According to the technical scheme, pneumatic measurement and optical measurement are combined, high-precision detection of the edges of the valve element of the sliding valve is achieved, and the problem that the measurement precision is insufficient in a complex environment is solved by fusing multi-modal data.

The utility model specifically relates to an electronic water pump fitting dimension detection device, which belongs to the technical field of fitting dimension detection and comprises a mounting base, a pressure control air pump fixedly mounted on the mounting base, a fixed mounting frame arranged on the upper surface of the mounting base, and a glass guide pipe designed in the fixed mounting frame. A positioning pressure block is clamped in the glass guide pipe in a sliding mode, a detection graduated scale is embedded in the inner side of the fixed installation frame, a pressure adjusting structure is designed on one side of the installation base, a flow guide hose is installed at the lower end of the pressure adjusting structure, a monitoring probe is fixed to the other end of the flow guide hose, and the outer side of the monitoring probe is sleeved with a distance adjusting outer sleeve. A user can conveniently and visually observe the air pressure difference between the interior of the glass guide pipe and the interior of the detection probe so as to quickly judge whether the size of the interior of the round hole reaches the standard or not, and the detection efficiency of the size of the round hole in the water pump accessory is improved.

The invention provides a flexible butt joint tool for a back-pulling airtight detection belt, and belongs to the field of machine tools. The problems that an existing tool cannot achieve high-precision butt joint, airtight detection and flexible buffering functions easily, and workpiece clamping deflection or detection failure is likely to be caused are solved. The backward-pulling airtight detection flexible butt joint tool comprises a box body, a driving unit and a tool body, the output end of the driving unit is provided with a rotating shaft and a pull rod, the tool body comprises a positioning disc, a tool cylinder, a reference piece and a spring clamping cylinder, the front end of the spring clamping cylinder is provided with a plurality of pressing blocks and sealing rings, the front end of the reference piece is provided with a reference hole and a plurality of equally-divided holes, and the pressing blocks are arranged on the box body. The bottom of the reference hole forms a workpiece reference surface, the equally-divided hole is of a T-shaped structure and is communicated with the outside of the reference piece, the rear end of the reference piece is connected with a movable piece, the movable piece is movably connected with the pull rod, an elastic piece is arranged between the movable piece and the pull rod, a plurality of guide columns are arranged on the movable piece, a plurality of stepped holes are formed in the reference piece, and limiting parts are arranged at the front ends of the guide columns. The method has the advantage of high-precision detection.

The utility model relates to the technical field of pneumatic gauges, in particular to an electronic column pneumatic gauge, which comprises a measuring mechanism and a stabilizing mechanism, and the stabilizing mechanism comprises two rotary knobs, two screw rods, two abutting discs, a protection assembly, two meshing assemblies and a plurality of moving assemblies. A measuring body in the existing measuring mechanism is a common electronic column pneumatic gauge in the market and is directly placed on a placing frame, the inner side of the placing frame is slightly smaller than the width of the measuring body, so that the measuring body is clamped and supported, and the measuring body is directly placed through a protective shell and an attaching plate which are directly placed. The protection effect on the measuring body is enhanced, subsequent disassembly and installation are facilitated, the design structure is simple, production is convenient, and the problems that a protection shell is fixed to a supporting base and is inconvenient to move, the pneumatic measuring instrument body is not easy to disassemble and maintain after being used for a long time, and installation is inconvenient are solved.

The invention relates to the technical field of rubber support detection, and discloses a shock insulation rubber support deformation detection device which comprises a heat insulation box, the interior of the heat insulation box is hollow, one side of the heat insulation box is open, first hydraulic rods are symmetrically arranged in the heat insulation box, and a heat insulation door is slidably connected to one side of the opening of the heat insulation box. An air extraction opening is formed in the side, away from the heat insulation door, of the heat insulation box, a communicating pipe communicating with the air extraction opening is installed on the surface of the heat insulation box, the other end of the communicating pipe communicates with an air storage cylinder installed at the top of the heat insulation box, and an air extraction piston is slidably connected into the air storage cylinder; one end of the air exhaust piston is fixedly connected with a movable rod which penetrates through one end of the air storage cylinder and extends to the outside, cold air in the heat insulation box is pumped into the air exhaust piston to be stored in a heat preservation mode through sliding of the air exhaust piston in the air storage cylinder, and when deformation detection is conducted on the shock insulation rubber support next time, the cold air stored in the air storage cylinder is sent back to the heat insulation box. The purpose of mixed heat exchange between cold air and gas in the heat insulation box is achieved.

The invention relates to engine cylinder body detection equipment, which belongs to the field of cylinder body detection equipment, and comprises a rod body, an air supply device and a detection disc arranged at the end part of the rod body, the peripheral side of the detection disc is sleeved with a flexible part; the outer wall of the flexible part is attached to the inner wall of the cylinder body. A plurality of detection channels are uniformly formed in the peripheral side of the detection disc; the detection channel penetrates through the flexible part; the air supply device is communicated with the plurality of detection channels; the air supply device is used for introducing air pressure into the plurality of detection channels; a movable plug is arranged in the detection channel; the movable plug is used for separating the detection channel from the indicator tube; an indicator tube is arranged on the detection disc; detection liquid is contained in the indicating tube; the indicator tube is communicated with the detection channel; and an image sensor is arranged on the rod body. The device has the technical effects of simplifying the detection operation and protecting the cylinder body.

The excessive attraction detection device (10) is composed of a cylinder part (12) including pistons (36, 38) and a magnet part (50) including an attraction permanent magnet (58), and the attraction permanent magnet can move integrally with the pistons between an attraction position and an avoidance position. The adsorption position desorption acting force acting on the piston is larger than the magnetic force of mutual pulling between the adsorption permanent magnet and the workpiece under the condition that one workpiece is adsorbed and held by the workpiece adsorption device, and is smaller than the magnetic force of mutual pulling between the adsorption permanent magnet and the workpiece under the condition that two workpieces are adsorbed and held by the workpiece adsorption device.