2315 results about "Pressure detection" patented technology

The invention discloses a threading pipe sealing air pressure detection device, and belongs to the technical field of threading pipe production. A threading pipe sealing air pressure detection device comprises an operation table, first rectangular sliding grooves are formed in the surfaces of the two sides of the upper end of the operation table, a moving assembly is connected into an inner cavity of each first rectangular sliding groove, and one end of each moving assembly is connected with an air pressure pump; the frame body connecting assembly adopts a double annular groove structure composed of a first annular connecting block and a second annular connecting block, the inner diameter and the outer diameter of the frame body connecting assembly are precisely matched with the end of the threading pipe, the arc-shaped guiding design is matched, the butt joint sealing performance is guaranteed, the pipe body is prevented from being scratched, and through the linkage feedback design of the air pressure jacking assembly and the polishing assembly, the polishing efficiency is improved. The air pressure in the pipe pushes the sealing block to ascend and descend, so that the sealing performance is judged, and compared with manual observation of a pressure gauge, tiny leakage points of the threading pipe can be accurately recognized, missing detection and false detection are avoided, and the detection precision is further improved.

The invention relates to the technical field of flexible sensors, in particular to a gradient hierarchical porous structure flexible piezoresistive sensor and a preparation method thereof. The sensor is of a laminated structure and comprises an upper flexible packaging protection layer, a lower flexible packaging protection layer, a conductive fabric electrode and a middle piezoresistive sensing layer, and a limiting frame is arranged on the periphery of the sensor. The sensing layer is prepared by adopting a 3D printing ink direct writing technology, and adopted printing slurry takes silicone rubber as a matrix and is uniformly mixed with expanded conductive microspheres and conductive filler. The printing wires are stacked in order to form a macroscopic gradient porous network structure; after the expanded microspheres are subjected to in-situ foaming, micro closed pores are formed in the material, and a rough microstructure is constructed on the surface of the wire material, so that hierarchical multi-scale regulation and control of a conductive network are realized cooperatively, contact sites are increased remarkably, and the sensitivity of the sensor is further improved effectively. The flexible piezoresistive sensor prepared by the invention has the advantages of high sensitivity, wide pressure detection range and high linearity, and has the commercial values of simple preparation process, high repeatability, lower cost and the like.

The embodiment of the invention provides an electronic lead sealing strip and a detection method based on the electronic lead sealing strip, the electronic lead sealing strip comprises a shell, a first lock cylinder, a second lock cylinder, a pressure detection module and a control module, the first lock cylinder, the second lock cylinder, the pressure detection module and the control module are arranged in the shell, and the first lock cylinder and the second lock cylinder are arranged in parallel; a pressure detection module is arranged at the vertical position of the first lock cylinder, and the first lock cylinder is further connected with a connecting line. The control module is connected with the first lock cylinder, the second lock cylinder and the pressure detection module. And under the condition that the connecting wire is inserted into the second lock cylinder and is stably installed, the control module determines the connecting state of the connecting wire by judging a loop of the first lock cylinder and the second lock cylinder and / or a pressure value collected by the pressure detection module. Whether the electronic lead sealing strip is cut off or not is judged according to the detected pressure value, and the reliability of the electronic lead sealing strip is improved.

The invention discloses a self-adaptive apple maturity lossless picking flexible claw and a picking method. The device comprises a base assembly, and a visual recognition module, a flexible clamping jaw assembly, a distributed pressure sensing module, a transmission execution module and a control unit are integrated on the base assembly. And the visual module adopts a depth camera and a YOLO11n model, judges the maturity grade in real time based on the apple red area proportion and is matched with the corresponding grabbing threshold force. The pressure sensing module is a thin film pressure sensor, and multi-point pressure feedback is achieved through a plurality of pressure detection points. The transmission module adopts a single motor to drive a lead screw nut lifting table, opening and closing of clamping jaws are synchronously controlled, the structure is light and simple, and cost is low. The picking method follows the process of recognition, matching, force control and picking, a cutter is not needed, lossless and high-success-rate self-adaptive picking is achieved, the problem of damage or failure caused by traditional fixed force control is effectively solved, the method is suitable for dense orchards, and the intelligent and lossless levels of apple picking are improved. The control unit is low in response delay and small in overshoot, and it is ensured that the grabbing force is accurately matched with the fruit state.

The invention relates to the technical field of package detection, and discloses a non-abandoned wine product package box compression resistance detection method and system based on a sensor. According to the method, surface pressure distribution data and internal stress waveforms of a packaging box are collected through a sensor network, and a multi-modal sensing data flow is generated. A three-dimensional digital twinning model of the packaging box is constructed based on the data flow, and material elastic parameters and structural constraint conditions are initialized; and carrying out compression resistance prediction training on the model to generate an adaptive compression resistance prediction model, and outputting a deformation simulation sequence in a virtual pressure environment. Real-time sensor data and a simulation sequence are dynamically compared to calculate a deformation error coefficient, so that a trigger threshold value of a pressure detection device is adjusted, and a compression resistance detection cycle is started. Multi-source data are fused in the circulation process for spatio-temporal feature analysis, and the overall compressive strength of the packaging box is evaluated. According to the invention, accurate prediction and dynamic detection of the compression resistance of the packaging box are realized.

This invention relates to a sampling device and method for sulfur hexafluoride (SF6) and its mixed gases used in electrical equipment. The sampling device includes an equipment connection module, a sampling module, a gas filling module, and a vacuuming module. The equipment connection module, used to connect the electrical equipment and the gas sampler, consists of an equipment connection valve, a diaphragm pump, and corresponding pipelines. The sampling module, used for gas buffering, consists of a sampling cylinder, a pressure detection unit, a sampling valve, a gas filling valve, a tail gas valve, and corresponding pipelines. The gas filling module, used to fill the sampling container, consists of a booster pump, a sampling container connection valve, and corresponding pipelines. The vacuuming module, used for vacuuming and tail gas collection, consists of a vacuum pump, a tail gas collection device, and its connection valves. The sampling method utilizes appropriate flushing and vacuuming methods when the gas pressure is higher or lower than 0.2 MPa. This sampling device and method can improve the accuracy of sampling sulfur hexafluoride gas or sulfur hexafluoride mixed insulating gases.

The invention relates to an automobile massage seat system, a control method and an automobile, and belongs to the technical field of automobile chairs, the automobile massage seat system comprises a pressure detection unit arranged on a seat and used for collecting pressure data to generate a continuous pressure distribution image of a contact part of a user and the seat; the acupuncture point determining unit is used for calculating the coordinate position of the target acupuncture point in a seat coordinate system based on the continuous pressure distribution image by combining an anatomical mark positioning and pressure feature matching method; and the massage execution unit is arranged in the seat and is used for massaging the user. The actual contact form of the user and the seat can be dynamically recognized based on the collected pressure distribution image, individualized precise positioning of acupuncture point coordinates is achieved through fusion analysis of anatomical marks and pressure features, the massage execution unit can adjust the massage position in real time according to the positioned coordinates, and the massage effect is improved. Therefore, it is ensured that the massage head accurately acts on the target acupuncture point, and the massage effectiveness and overall comfort of a user are improved.

The utility model relates to a portable coffee machine which comprises a shell assembly, a water tank, a water pump, an extraction assembly and a pressure detection piece, and the shell assembly is provided with a first through hole; the water tank is installed in the shell assembly. The water pump is installed in the shell assembly, the water pump is provided with a water inlet end and a water outlet end, and the water tank is communicated with the water inlet end of the water pump; the extraction assembly is mounted in the shell assembly, and the extraction assembly is communicated with the water outlet end of the water pump; the pressure detection piece is installed in the first through hole, the pressure detection piece is provided with a detection end, the detection end is communicated with the extraction assembly, and the pressure detection piece is used for detecting and displaying the pressure in the extraction assembly. According to the portable coffee machine, the pressure in the extraction cavity is detected through the detection end, so that the pressure in the extraction cavity is displayed through the pressure detection, a user can conveniently know the pressure in the extraction cavity, and then the user can conveniently adjust coffee extraction conditions according to self requirements.

The invention relates to the technical field of sensors, in particular to a temperature and humidity pressure sensor which comprises a port seat, a PCB mainboard supporting seat, a PCB mainboard, a terminal seat assembly and a shell, the port seat is provided with a pressure detection special channel and a temperature and humidity detection special channel which are separated, and a pressure sensing module is mounted through a sensing position at the top of a boss. A traditional complex inner plane machining structure is abandoned, and the special channel meets the requirements of two types of detection on the fluid state through differential design. The PCB mainboard supporting seat is provided with a positioning structure and a through groove, accurate positioning and stable electric connection of the PCB mainboard and the sensing module are guaranteed, the terminal seat assembly adopts a buckle and guiding design to improve the assembling efficiency, reliable protection is achieved in cooperation with a double-sealing structure, synchronous and accurate detection of temperature, humidity and pressure parameters is achieved on the whole, assembling is convenient, the production cost is low, and the product quality is improved. The method is suitable for various working condition scenes; the problems that the detection precision of the same flow channel of an existing integrated sensor is mutually disturbed, and the machining technology is complex can be effectively solved.

The application discloses a kind of building engineering template support strength detection equipment, belong to template strength detection technical field, including detection table and rack, the top of detection table is provided with support frame and turnover mechanism, turnover mechanism is used to drive support frame overturning;It also includes the moving mechanism and guide mechanism being set in rack, lifting frame is set on moving mechanism.The application is integrated with vibration mechanism by setting cleaning mechanism on lifting frame, can automatically clean template surface before strength detection;Cleaning shovel is driven under the vibration mechanism, and the template surface is flexibly and slightly high-frequency spliced and vibrated, effectively removes cement block and other sundries on the surface of wooden template, avoids template surface being pressed in subsequent pressure detection due to the existence of hard object, which protects the flatness and reuse value of template, and also ensures that support strength detection directly acts on template body, thereby significantly improving the accuracy and reliability of detection result.

The utility model discloses gel pillow pressure detection equipment, which comprises a workbench, a support frame is arranged at the top of the workbench in a sliding manner, a hydraulic rod is arranged at the top in the support frame, a pressure sensor is arranged at the bottom of the hydraulic rod, and a mounting frame is arranged at the bottom of the pressure sensor; a head mold is arranged in the mounting frame, and two groups of positioning holes are formed in the side wall of the head mold; an adjusting mechanism is arranged in the mounting frame, the adjusting mechanism can adjust the contact surface of the head mold for extruding the gel pillow, the head mold and the adjusting mechanism are arranged, the head mold can simulate the extrusion of a real head on the pillow, and the adaptation degree of the pillow and a real use scene is improved; meanwhile, the adjusting mechanism can drive the head mold to rotate, and the contact surface of the head mold extruding the gel pillow can be adjusted, so that the conditions that the back side of the head makes contact with the pillow and the head lies on the side and makes contact with the pillow can be simulated, and the pressure detection accuracy is improved.

The invention discloses an evaporation pressure reference controller for a lithium bromide absorption refrigeration system. The evaporation pressure reference controller comprises a pressure detection unit, a reference unit, a comparison unit and an execution unit. The pressure detection unit detects absolute pressure in the evaporator in real time; the reference unit provides a reference signal of the target evaporation pressure; the comparison unit outputs a pressure deviation signal; and the execution unit adjusts the circulation volume of the lithium bromide solution so as to approach to the solution circulation volume under the full-load design working condition of the system, and the adjustment benchmark is the full-load design working condition of the system. The evaporation pressure serves as an absolute physical reference, the solution circulation amount is dynamically adjusted, the system is made to adapt to the heat source load, the concentration automatically avoids the crystallization line, and the functions of load monitoring, crystallization early warning, energy efficiency calculation and the like are provided. And the device is suitable for various low-grade heat source scenes such as hot water, steam and flue gas, can be used for new machine manufacturing and stock transformation, and reduces the equipment size and the manufacturing cost.

The invention discloses a multifunctional neural electrode for intracranial pressure detection and closed-loop nerve regulation, the multifunctional electrode sequentially comprises a PMUT electrode for intracranial pressure detection and nerve regulation and a macro-micro electrode for electroencephalogram signal detection from top to bottom, and the PMUT electrode is bonded on the macro-micro electrode. The PMUT electrode is bonded to the macro-micro electrode to serve as a multifunctional electrode, the PMUT electrode can serve as a pressure sensor and can also serve as an ultrasonic transducer, the dual functions of intracranial pressure detection and fixed-point ultrasonic nerve stimulation are achieved, the macro-micro electrode can achieve detection of local field potential and peak potential, and the ultrasonic nerve stimulation function is achieved. Therefore, a detection-feedback-regulation closed-loop system is realized.

The invention provides a prepreg method and equipment for automatically adjusting compensation parallelism, computer equipment and a storage medium. The method comprises the steps that an upper roller and a lower roller abut against each other in parallel to obtain a current end pressure standard value; setting an end pressure deviation threshold value; respectively obtaining a first end pressure value and a second end pressure value when the two ends of the upper roller and the lower roller jointly extrude the carbon fibers during preimpregnation; carrying out difference processing on the first end pressure value and the second end pressure value to obtain an end pressure deviation value; judging whether the absolute value of the end pressure deviation value is greater than an end pressure deviation threshold value; if yes, the gaps between the two ends of the upper roller and the gaps between the lower roller are automatically adjusted so as to compensate the parallelism between the upper roller and the lower roller. Through comparison and judgment of the end pressure deviation threshold value and the absolute value of the end pressure deviation value, the gap does not need to be adjusted according to the pressure detection value, mechanical vibration and pressure detection noise are prevented from causing excessive adjustment of preimpregnation equipment, interference items of mechanical vibration and pressure detection noise are eliminated, and the prepreg operation is more stable.

The invention relates to the technical field of coke oven operation control, in particular to an expansion pressure detection method applied to an electric heating coke oven, which comprises the following steps: dividing coking stages based on coal state change in a historical coking period of the electric heating coke oven, and setting a reference acquisition frequency for each coking stage; for each coking stage, real-time data acquisition is carried out based on the reference acquisition frequency, and expansion pressure detection data is obtained; performing pressure anomaly calculation on the expansion pressure detection data to obtain an expansion pressure change rate and an expansion pressure distribution characteristic; correcting the reference acquisition frequency according to the reference acquisition frequency to obtain a dynamic acquisition frequency corresponding to the coking stage; and generating expansion pressure detection alarm information in response to the condition that at least one of the expansion pressure detection data, the change rate, the distribution characteristic and the dynamic acquisition frequency exceeds a corresponding preset warning threshold value. Acquisition frequency can be dynamically adjusted along with coal expansion characteristics, timeliness of pressure peak capture is guaranteed, and redundant data in a stable stage is reduced.

The invention relates to the technical field of transmitters, in particular to a pressure difference transmitting device which comprises a hydraulic body, and an upstream hydraulic channel and a downstream hydraulic channel are arranged in the hydraulic body. The sealing mechanism isolates the high-pressure cavity from the low-pressure cavity when the first pressure detection unit and the second pressure detection unit perform air pressure detection, and communicates the high-pressure cavity with the low-pressure cavity when the first pressure detection unit and the second pressure detection unit do not perform air pressure detection; separate transmission of liquid and gas is carried out through a liquid flow channel composed of an upstream hydraulic channel and a downstream hydraulic channel and a gas pressure cavity channel, so that a high-pressure cavity extends between a first pressure detection unit and the upstream hydraulic channel, a low-pressure cavity extends between a second pressure detection unit and the downstream hydraulic channel, and a medium is introduced at the beginning or discharged after completion; and the damage of measurement components caused by overlarge one-way pressure difference is avoided.

The invention discloses a nondestructive pipeline gas pressure detection method and system based on ultrasonic waves, and the method comprises the steps: S1, carrying out the detection of the pressure of a pipeline gas in a reference pressure state, acquiring the amplitude of a reference signal received after the ultrasonic signal passes through the pipeline to be detected and the reference gas medium in the pipeline to be detected; s2, under the pressure to be measured, the amplitude of the measured signal received after the ultrasonic signal penetrates through the measured pipeline and the gas medium in the measured pipeline is obtained; and S3, estimating the current pressure of the gas in the pipeline according to the obtained reference signal amplitude and the measured signal amplitude.

A rotary two-station laser marking and pressure detection tool disclosed by the present invention comprises a turntable, the turntable is provided with a first station and a second station, the periphery of the turntable is provided with a pre-pressing head, a measuring head, a laser marking machine and a code scanning camera, and a driving device can drive the pre-pressing head and the measuring head to respectively carry out pressure detection on an isolation knife arranged at the first station or the second station. The pressure sensor in the measuring head transmits a measured pressure value to the computer, the laser marking machine can record a two-dimensional code on the isolation knife, and the code scanning camera can scan and recognize two-dimensional code information and transmit the two-dimensional code information to the computer. The invention aims to provide the rotary two-station laser marking and pressure detection tool which can simultaneously realize laser marking of an isolation knife, scanning confirmation and pressure detection of a two-dimensional code, uploading of data and binding of two-dimensional code information and a pressure value, so that the confusion situation possibly caused by manual data entry is avoided; meanwhile, the detection time is shortened, and the labor cost is reduced.

The invention relates to an intelligent water pressure control method and system for a spunlace non-woven fabric production line, and belongs to the technical field of non-woven fabric production. The method comprises the steps that a fiber web surface image, a fiber web operation speed value, a water flow temperature value and a water pressure fluctuation signal are collected; extracting a fiber distribution density characteristic value and a fiber orientation angle characteristic value according to the fiber web surface image; based on the fiber-water pressure characteristic mapping database, extracting a reference pressure set value; performing frequency domain analysis on the water pressure fluctuation signal, calculating a water flow dynamic viscosity compensation coefficient according to the water flow temperature value, and outputting a comprehensive disturbance compensation vector; inputting the data and a pressure data sequence of a historical preset time period into a long short-term memory neural network model, and outputting a pressure predicted value sequence; and solving an optimal pressure set value, calculating a deviation absolute value according to the optimal pressure set value and an actual pressure detection value, and generating a corresponding water pressure adjusting instruction. The water pressure self-adaptive adjusting device can realize water pressure self-adaptive adjustment in the production process of spunlace non-woven fabrics.

A pressure measurement assembly for sensing a force acting on an end portion of a robot nail, and a bionic finger, said pressure measurement assembly comprising an end knuckle (1), an artificial nail (2), and a processing module. The artificial nail (2) is mounted on the end knuckle (1), the rigidity of the artificial nail (2) is set above Mohs 2, a nail front edge (21) extends outwards beyond a fingertip of the knuckle, and an end portion of the nail front edge (21) serves as a first force acting area (21a) to be in physical contact with an external object. The artificial nail (2) is slidably connected to the end knuckle (1) in a direction along the fingertip. Under a force acting on the first force acting area (21a), the artificial nail (2) slides toward the knuckle. At least one first pressure sensor (212) capable of autonomous elastic recovery after being pressed is fixed on the sliding path for measuring a first one-dimensional force. The size of the outer diameter of the pressure sensor (212) is configured to be at most 100% of the maximum size of the artificial nail (2). The processing module is coupled to the first pressure sensor (212) for outputting, on the basis of the first one-dimensional force, the applied force acting on the first force acting area (21a).

A chip peeling apparatus is provided that includes a housing having a seating surface for mounting a wafer, a recessed portion and a first vacuum suction hole in the seating surface, and a second vacuum suction hole, a blow hole and a protrusion in the recessed portion. The chip peeling apparatus further includes: a vacuum suction source that evacuates the first vacuum suction hole and the second vacuum suction hole; a pressure detector that detects a degree of vacuum of the second vacuum suction hole; a pressurization source that sends a fluid to the blow hole; a flow rate control valve; and a controller that determines a flow rate of the fluid to be sent to the blow hole, based on the degree of vacuum, and controls, via the flow rate control valve, the fluid sent from the pressurization source to flow at the determined flow rate.

The invention relates to the technical field of automobile testing equipment, and discloses a new energy automobile chassis load testing device which comprises a testing table, a ramp is connected to one side of the surface of the testing table, electric sliding rails are symmetrically installed on the two sides of the testing table, and walking frames are slidably arranged in the electric sliding rails. Telescopic rods are arranged on the two sides, close to each other, of the walking frame, pressure detection mechanisms are arranged at the tops of the two sides of each telescopic rod correspondingly, each pressure detection mechanism comprises a mounting plate, the mounting plates are fixedly connected with the two sides of the corresponding telescopic rod correspondingly, and hanging rods are fixedly mounted on the two sides of the center of the bottom of each mounting plate; the bottom of the hanging rod is hinged to a swing arm, an extension arm is movably installed in the swing arm, and the sides, close to each other, of the extension arm are rotationally connected with a gravity roller, the driving test of various different items can be simulated, continuous running is achieved, the integration degree is high, and the test time is highly saved.

The invention belongs to the technical field of flexible electronics, and relates to a flexible piezoresistive sensor based on an MXene multilevel heterostructure and a preparation method of the flexible piezoresistive sensor. The method comprises the steps that MXene nanosheets are attached to the surface of a thermoplastic polyurethane nanofiber substrate through electrostatic self-adsorption, a nanofiber composite layer is obtained, UIO-66-NH2 is dispersed in the thermoplastic polyurethane nanofiber substrate, and the surface of the thermoplastic polyurethane nanofiber substrate is modified with a first chitosan modification layer; the MXene nanosheets are embedded into the three-dimensional network of the polyurethane foam skeleton through dipping and extruding operation, a porous foam composite layer is obtained, and the surface of the polyurethane foam skeleton is modified with a second chitosan modification layer; and combining the nanofiber composite layer and the porous foam composite layer through a conductive adhesive containing silver paste, and carrying out packaging treatment to form the MXene multistage heterostructure with tightly combined interfaces. Based on the method, through the synergistic effect of the multistage heterostructures, high sensitivity, wide pressure detection range and high stability are realized at the same time.

A control method and control apparatus for an electronic oil pump, applied to a vehicle. The control method comprises: after an engine of a vehicle is started, detecting whether a pressure measurement device has a fault; when the pressure measurement device does not have a fault, on the basis of real-time oil state parameters and real-time working condition parameters of the engine, determining a target requested rotation speed corresponding to an electronic oil pump, wherein the real-time oil state parameters at least comprise a real-time oil temperature and a real-time oil pressure, and the real-time working condition parameters at least comprise a real-time engine rotation speed and a real-time engine torque; and, on the basis of the target requested rotation speed, controlling the oil pump rotation speed of the electronic oil pump.

The utility model relates to the field of aviation mechanical parts, in particular to aviation mechanical part reliability life analysis pressure detection equipment which comprises a workbench and is used for aviation mechanical part life analysis pressure detection. According to the pressure detection equipment for reliability and life analysis of the aviation mechanical part, through the arrangement of the protective cover, the sealing door, the electric heater, the hydraulic cylinder, the hydraulic pump, the connecting sleeve, the pressure sensor, the contact block, the driving signal controller and the display, the aviation mechanical part is placed on the placing plate, and the sealing door is closed; then multiple sets of electric heating devices on the two sides in the protective cover are turned on, the interior is heated through the electric heating devices, then a hydraulic pump switch is turned on, oil pressure is generated in the interior to push a hydraulic cylinder and a contact block at the lower end to press downwards, and therefore pressure detection is conducted on the mechanical parts; and data obtained by a pressure sensor above the contact block is transmitted to a driving signal controller, and then the driving signal controller transmits the data to a display for observation and analysis.

The utility model discloses a temperature pressure detection instrument, include: installation joint is installed on the test end pipeline, and the test core is installed on the installation joint, the temperature pointer subassembly is connected with through the temperature sensing component in the test core middle part, and the pressure pointer subassembly is connected with through the linkage amplification subassembly on one side of test core, the working medium in the pipeline or equipment flows in after in the utility model, and the temperature pointer subassembly is driven to rotate through the temperature sensing component, and the pressure pointer subassembly is driven to rotate through the linkage amplification subassembly, can detect pressure and temperature value simultaneously, and the relevant data is read on a dial simultaneously, and the detection cost is reduced effectively, and the detection efficiency is improved.

This invention provides a bobbin thread quantity detection device and method, and a sewing machine. The bobbin thread quantity detection device includes two magnetic components, a guide wire, and a detection system. The two magnetic components are respectively mounted on the bobbin case and are arranged opposite to each other along the circumferential direction of the bobbin case. The guide wire is mounted on the bobbin, and the bobbin has two contact portions. The two ends of the guide wire are respectively positioned corresponding to the two contact portions. At least a portion of the guide wire is mounted on the bobbin's rotating shaft, and a bobbin thread is wound on the rotating shaft to provide pressure for the two ends of the guide wire to move towards the two contact portions. The detection system is connected to the guide wire to detect the induced current on the guide wire. During bobbin rotation, the presence or absence of an induced current on the guide wire is used to determine whether there is sufficient bobbin thread. This invention solves the problem of low accuracy in detecting the bobbin thread quantity in existing technologies.

The utility model discloses a kind of sealing detection devices for safety valve production, belong to safety valve production technical field, its technical scheme main points include base, the top of base is provided with detection mechanism and fixed assembly, the detection mechanism includes support frame and sealing joint, the top of sealing joint is connected with external pipe, the left side of sealing joint is fixedly connected with pressure detector, the right side of sealing joint is fixedly connected with flow detector, solve the safety valve sealing detection device in existing detection process usually relies on artificial observation pressure gauge, artificial observation cannot capture subtle change in pressure in real time, detection precision is insufficient, and visual fatigue is easily generated, and existing detection device usually lacks the flow monitoring of leakage medium, only by pressure change judges sealing property, cannot accurately quantify leakage degree, it is not conducive to subsequent product quality analysis and improvement problem.

This invention belongs to the field of handle testing technology, and particularly relates to a handle operating torque testing device and its usage method. The testing device includes: a support platform, a clamping seat, an axial positioning seat, a drive assembly, and a pressure testing assembly. The support platform can support the entire testing device; the clamping seat is used for coaxial clamping of the handle and the axial positioning seat; one end of the axial positioning seat is provided with a positioning groove, the center of the positioning groove coincides with the center of the axial positioning seat; the drive assembly includes a rotary power source and a transmission shaft, one end of the transmission shaft is connected to the output end of the rotary power source, and the other end of the transmission shaft can be coaxially inserted into the positioning groove; the pressure testing assembly includes a swing frame, a pressure sensor, and a contact element; the swing frame is located between the rotary power source and the axial positioning seat, one end of the swing frame can rotate synchronously with the transmission shaft, one end of the pressure sensor is set on the swing frame, and the other end of the pressure sensor is close to the handle along the axial direction of the transmission shaft and connected to the contact element at the end, the end of the contact element away from the pressure sensor contacts the surface of the handle; compared with the prior art, this invention solves the problems of low axial alignment efficiency, reliance on manual experience, and insufficient batch testing efficiency in the prior art, while maintaining high accuracy of the testing results and meeting the standardized testing needs of the lock industry.

The invention discloses a ventilation operation test device for a metal and non-metal mine. The ventilation operation test device comprises a base, a test operation assembly, a mine exclusive detection assembly, a linkage monitoring display assembly and an intelligent test system, a real ventilation system of a metal and nonmetal mine is simulated through the test operation assembly, the detection assembly adapts to common gas, dust and pressure detection requirements of the mine, and the problem that existing equipment and mine ventilation operation are not high in relevance is solved; a test operation assembly, a detection assembly and a monitoring display assembly are deeply integrated through the intelligent test system, operation instructions of students drive equipment, generated working condition parameters are detected in real time, the whole process is synchronously monitored, all data are gathered to a central system to be analyzed, the organic linkage of operation-detection-monitoring-analysis is achieved, and the intelligent test system has the advantages of being simple in structure, convenient to use and high in efficiency. A vivid and closed-loop training environment is formed, and a qualitative leap from discrete operation practice to systematic homework simulation is realized.