41results about How to "High measurement and control precision" patented technology

The invention discloses a mountain torrent disaster on-line monitoring and identification early warning method. The method includes the following steps that: a data acquisition subsystem acquires data at a site: an automatic rainfall monitoring station acquires and processes disaster field rainfall information and transmits the information to the system platform of an early warning index analysis model through a wireless mode and / or a wired transmission mode, a water level and / or mud level monitoring station acquires and processes field debris flow and water level information and transmits the information to the system platform of the early warning index analysis model through a wireless mode and / or a wired transmission mode, and a video monitoring station acquires and processes disaster field image information and transmits the information to the system platform of the early warning index analysis model through a wireless mode and / or a wired transmission mode; an identification early warning subsystem performs early warning judgment and issues internal early warnings; personnel are determined, and formal early warnings are issued; real-time monitoring is performed; and information query is performed. The method has the advantages of rapid identification and predictive early warning, and can assist in avoiding loss. The invention also discloses an early warning system using the mountain torrent disaster on-line monitoring and identification early warning method.

The invention discloses an anti-dizziness stabilizing mechanism which is suitable for cars, ships and other vehicles. The stabilizing mechanism comprises a lower platform, three actuators, a mechanism controller, joints and an upper platform, wherein the lower platform is fixedly connected with a vehicle, and the upper platform is fixedly connected with a facility. The mechanism controller fixed to the lower platform perceives the posture change of the vehicle, hereby controls the three actuators fixedly connected with the lower platform through the single-freedom-degree joints to change the length of pushing rods and drives the upper platform connected with the actuators through three double-freedom-degree joints to enable the posture change of the upper platform in a space to just offset the posture change of the vehicle, and the space of the facility fixedly connected to the upper platform is always kept to be balanced and stable when the vehicle is bumped and waggled, so that carsickness, seasickness and other illness situations of a passenger are effectively reduced and relieved.

The invention discloses a vacuum-induction centrifugal casting device comprising a furnace body, wherein the upper end of the furnace body is provided with a furnace cover, a smelting cavity and a centrifugal casting cavity are symmetrically arranged in the furnace body, a smelting device is arranged in the smelting cavity, a centrifugal heating and casting device is arranged in the centrifugal casting cavity, and an overturning space for the smelting device is respectively arranged between the upper parts of the smelting cavity and the centrifugal casting cavity and the furnace cover. The invention further discloses a titanium alloy casting method by utilizing the vacuum-induction centrifugal casting device, wherein the titanium alloy casting method comprises the following steps that after titanium alloy is molten into liquid metal in a crucible, the crucible is overturned so that the liquid metal flows into a rotating casting liner, and a heating and heat-insulating device is further mounted outside the casting liner, finally a thin-wall titanium alloy casting is obtained. The vacuum-induction centrifugal casting device disclosed by the invention can cast flawless-surface thin-wall metal components.

The invention relates to a quantitative soil splash erosion power monitoring system and method. A distance between a splash erosion disc of a soil splash erosion monitoring system and a video raindrop disdrometer of a rainfall monitoring system is maintained within 3m to 5m, the consistency of a rainfall area in which the rainfall monitoring system is located is guaranteed, and all parameters of the rainfall area suffering the rainfall are maintained consistent, so that the measurement and the calculation of raindrop kinetic energy, the sampling of splash erosion amount and the establishment of arelational expression between the raindrop kinetic energy and the splash erosion amount can be relatively precisely carried out, and the soil splash erosion amount in the selected rainfall area can be relatively precisely predicted. The quantitative soil splash erosion power monitoring system is convenient to operate and high in measure and control precision, utilizes a raindrop spectrum to generate the raindrop mass data and speed data, has the advantages of high precision, high speed, high efficiency, capability of clearly representing the raindrop mass and the raindrop speed, and the like in the event based rainfall process, and is wide in application range.

The invention discloses a dual-varying-slope erosion groove and interflow determining instrument and a determining method thereof. A model fixing support formed by welding a lower soil erosion groove, an upper soil erosion groove and a steel frame is arranged, and the upper and lower bottom ends of the model fixing support are each connected with a lifting device. The upper soil erosion groove and the lower soil erosion groove are connected through a plastic transition belt. The soil erosion groove is divided into a left part and a right part through a soil erosion groove partition plate, and the lower soil erosion groove is connected with an interflow collector and a surface flow collector. The invention further relates to the determining method adopting the dual-varying-slope erosion groove and interflow determining instrument in the soil water erosion process; by adopting the instrument, slope surface micro-topographies of different concave-convex forms can be constructed; by determining interflow, surface flow, sediment, slope surface erosion morphology, the number and sizes of rills and other important parameters, quantitative analysis can be performed on the rules of occurrence and development of soil water erosion in the whole precipitation process, and the application range is wide.

The invention provides a device and a method for extracting soil surface crack pores, and relates to the basic technical field of soil. The device comprises the following steps that a photo taking device is fixed on a fixing frame; a lens of the photo taking device is arranged in a downward direction; a photostudio is positioned under the photo taking device; a shooting hole is formed in the top surface of the photostudio, and is arranged in a way of being opposite to the lens of the photo taking device; a soil sample placing hole is formed in one side wall of the photostudio; a soil sample fixing platform is arranged inside the photostudio and is positioned right under the shooting hole; the soil sample fixing platform comprises a base and a placing platform; the base is fixed onto the bottom of the photostudio; the placing platform is fixed on the base; a soil sample placing groove is formed in the middle of the fixing platform; a plurality of target points are arranged around the soil sample placing groove; the included angle between the two adjacent target points is 45 degrees. The device and the method have the advantages that the operation is convenient; the test and controlprecision is high; the change process of each parameter of soil surface cracks / pores and the like can be clearly shown again; the application range is wide.

The invention provides an inertial navigation system testing method and testing system. The testing method comprises the following steps: setting a control command configuration content to configure a control command of an inertial navigation system, setting a flow control configuration content to configure different test control flows, calling the flow control configuration content to setting a control flow to test the inertial navigation system, and according to the set control flow, calling the control command configuration content. The invention also provides an inertial navigation system testing system, which comprises a control command configuration file, which is used for storing a control command configuration content for configuring the control command of an inertial navigation system; a test control flow content configuration file, which is used to store a flow control configuration content for configuring different test control flows; and a test platform, which is used to call and operate the control command configuration file and the test control flow content configuration file. The provided system and method can control the flows in an inertial navigation system test without changing the software codes and hardware equipment.

The invention relates to the field of bearing manufacturing equipment and aims to provide a bearing ring blank cold-rolling machine. The bearing ring blank cold-rolling machine includes a bottom box, a core roller device, a rolling wheel device, a supporting wheel device, a driving device, a blank supporting device, a discharge channel, a feeding device and a measuring and control device, wherein the upper end of the bottom box is provided with a rear plate, the core roller device is connected with the upper end of the bottom box through at least one small sliding rail and provided with a core roller, the rolling wheel device is located on the left side of the core roller device, provided with rolling wheels cooperated with the core roller in blank rolling, and connected with the rear plate, the supporting wheel device and the driving device are located on the right side of the core roller device and are connected with the upper end of the bottom box through at least one big sliding rail, the blank supporting device is located on the lower side of the core roller, a discharge channel is formed in the lower side of the core roller, and the feeding device and the measuring and control device are located on the upper side of the core roller. A bearing ring blank processed by the bearing ring blank cold-rolling machine is dense in interior texture, long in service life and small in metal machining allowance.

The invention belongs to the technical field of motor vehicle safety testing, and in particular relates to a motor vehicle safety belt locking performance test bench, including a test bench, which is characterized in that the test bench is equipped with a vehicle sense test mechanism and a belt sense test mechanism at the same time. A measurement and control system is provided beside the test bench, and the measurement and control system is electrically connected to the vehicle-inductive testing mechanism and the inductive testing mechanism respectively. The beneficial effects of the present invention are: by changing the motion acceleration of the linear motor head, the emergency locking function of the safety belt worn by the driver under different working conditions can be simulated, and the test bench can realize the emergency locking function of the safety belt of different types of motor vehicles. Detection of locking performance.

The invention provides a deep-sea mining simulation device and a simulation method thereof. The device comprises: a water tank, a multi-degree-of-freedom motion robot arm, a circulating water pump and a flow meter, wherein an opening is formed in the upper part of the water tank; the lower end of the multi-degree-of-freedom motion robot arm is connected with a mining device and stretches into the water tank; the circulating water pump is connected to the water tank; the flow meter is connected to the circulating water pump and is connected to the mining device through a communicating water pipe. According to the deep-sea mining simulation device and the simulation method thereof, provided by the invention, a multi-degree-of-freedom motion and mineral collection process of a mining head can be simulated; the deep-sea mining simulation device and the simulation method thereof are suitable for hydrodynamic performance research of a deep-sea mining device.

Closure device or lock device for a vacuum chamber comprisinga counter plate, which can be arranged on a vacuum chamber and surrounds an opening of the vacuum chamber,a frame, which is supported in such a way that the frame can be moved in relation to the counter plate and on which a closure cover is movably arranged, wherein the closure cover closes the opening in sealing manner in a closed position against the counter plate,at least one magnet device for producing a closing force acting between the counter plate and the closure cover, which is in engagement with the counter plate and with the closure cover.

The invention relates to a steam cylinder electric control drainage device which comprises a steam cylinder. The steam cylinder comprises a steam rotary connector which is provided with a drain outlet and a steam inlet. The steam cylinder electric control drainage device is characterized by further comprising a temperature transmitter, a control valve, a drain pipe and a controller, the drain pipe is communicated with the drain outlet of the steam rotary connector, the temperature transmitter and the control valve are arranged on a pipeline of the drain pipe, the temperature transmitter is electrically connected with the controller, and the control valve is directly or indirectly electrically connected with the controller. Steam lock can be effectively prevented from being formed, drainage is accurate, and energy conservation and efficiency are achieved.

The invention relates to the field of bearing ring manufacturing and measuring devices and aims at providing a cold rolling measuring and controlling device for a workblank of a bearing ring. The cold rolling measuring and controlling device for the workblank of the bearing ring comprises a fixed seat, a sliding seat connected with the fixed seat through a transverse sliding rail, a measuring head fixedly connected with the sliding seat, a collision mechanism driving the measuring head to collide against the outer periphery of the workblank of the bearing ring, and a measuring and controlling device. When the cold rolling measuring and controlling device for the workblank of the bearing ring is used, the collision mechanism pushes the measuring head to collide against the outer periphery of the workblank of the bearing ring, the outer periphery of the workblank of the bearing ring enables the measuring and controlling device to act through the measuring head and the collision mechanism along with the expansion of the outer diameter of the workblank of the bearing ring during the cold rolling, and when the outer diameter of the workblank of the bearing ring reaches the specified value, the measuring and controlling device transmits a signal to a controller and then the controller controls a bearing ring cold rolling device to stop and get out of the cold rolling state. The cold rolling measuring and controlling device for the workblank of the bearing ring is relatively high in measuring efficiency and measuring precision.

The invention discloses a flow metering system for oilfield production fluid. The flow metering system consists of a flow measurement mechanism, a compensation mechanism and a data calculation mechanism which are connected integrally. The system is very suitable for measuring liquid, such as mud, slurry, slurry oil, fuel oil, residual oil, coal tar and other fluids with high viscosity as well as suspended, easy-to-crystallize and dirty fluids, which is difficult to measure by a conventional flowmeter, to keep extremely high measurement precision and measurement stability. The metering system is novel in design and high in functionality; the difficulty in accurate metering of mixed media of oilfield production fluid, particularly medium oil / water components can be accurately metered, so that the efficiency of the metering system is improved, the investment for meters is reduced, and the demands of the metering system for various environments are met; the system is not required to be cleaned and maintained by a worker, so that human resources are saved, and the production efficiency is improved; the application prospect is considerable.

The invention discloses an ethylene concentration measuring and monitoring device and a measuring and monitoring method thereof. The ethylene concentration measuring and monitoring device comprises asealed box, gas sensors, temperature and humidity sensors, an ultraviolet lamp assembly, a light-transmittable cylinder, a wind power assembly and a control assembly. The ethylene concentration measuring and monitoring device uses the ordinary gas sensors for replacing high-priced ethylene sensors and uses multiple gas sensors, so that the concentration measuring accuracy is improved and the service life is prolonged; ultraviolet lamps are used for catalyzing ethylene, the ultraviolet lamps have lower energy consumption than mercury lamps, the ultraviolet lamps do not contain a common harmfulsubstance mercury in a CCFL technology, and the ultraviolet lamps have vibration-proof and impact-resistant effects and are rarely damaged, so that garbage can be reduced and the cost can be reduced;in addition, through a fitting relationship of voltage and concentration, the ethylene concentration can be accurately detected; furthermore, through decomposition of the ultraviolet lamps, the concentration can be accurately controlled, so that the intelligent control operation ability is strong and the measurement and control precision is high.

The invention belongs to the technical field of laser time transfer, and discloses a laser time transfer processing method and system, a storage medium, a device and an application, and the method comprises the steps: constructing respective local time systems of a ground observation station and a spacecraft, and controlling a laser pulse transmitting link and a laser pulse receiving link with thereference of the local time systems; in a transmitting link, performing event moment measurement on a first transmitted pulse, encoding the measurement moment, performing pulse position encoding modulation on subsequent pulses, and generating an encoded laser pulse sequence; receiving a sent coded laser pulse sequence containing time information at a spacecraft receiving link end, and convertingthe coded laser pulse sequence into an electric signal; measuring the moment of each pulse, and comparing the decoding moment with the measured pulse moment to obtain the system time deviation betweenthe spacecraft and the ground observation station. According to the invention, time transmission and synchronization between deep space aircrafts with farther distances are realized, and the controlprecision of the deep space aircrafts is improved.

The invention discloses a cement stabilized broken stone scouring resistance test method based on a transverse wheel roller. The cement stabilized broken stone scouring resistance test method comprises following steps: 1, reasonable grading limit is selected based on the different grades of aggregates, and a mix ratio is designed; 2, at least five binder dosages are selected based on the mix ratioand technology requirements, and optimum water content and the largest dry density of a mixed material at different dosage conditions are determined; 3, moulding of a standard test piece is realizedbased on experiments, and the optimal binder dosage is determined; 4, moulding of a double layer rut plate is carried out; 5, nourishing of the moulded test piece is carried out at standard conditionsfor 28 days; 6, after nourishing, the test piece is dried at 105 DEG C until the weight is constant, and mass m1 is obtained via weighting; 7, a transverse distributed type rut instrument is turned on for 60min; 8, after test, the rut plate is taken out from the transverse distributed type rut instrument, and is dried at 105 DEG C until the weight is constant, mass m2 is obtained via weighting, and the mass m3 of a test mould is obtained via weighting after demoulding; and 9, results are obtained based on formulas that the scouring amount is m1-m2, and the scouring rate is (m1-m2) / (m1-m3). The cement stabilized broken stone scouring resistance test method is simple, and operation is convenient.

The invention relates to a closing distinguishing method of a quasi-spherical resonant cavity. The closing distinguishing method comprises the steps of 1, placing the quasi-spherical resonant cavity in a constant-temperature chamber, placing the quasi-spherical resonant cavity on an optical platform by a support, and aligning an upper hemisphere and a lower hemisphere of the quasi-spherical resonant cavity for coincidence and alignment by an alignment ring; 2, completing coincidence and alignment of the two hemispheres, and introducing stable flow amount of high-purity low-temperature gas intothe quasi-spherical resonant cavity to complete connection and debugging of an experiment system; and 3, performing closing operation of the quasi-spherical resonant cavity, achieving accurate monitoring of a gap between an upper hemisphere equatorial plane and a lower hemisphere equatorial plane during the closing process by accurate measurement and control of a microwave signal and real-time calculation of relative excessive half width, and achieving accurate distinguishing on closing of the quasi-spherical resonant cavity according to a change trend of the relative recess half width. The new closing judging method has universality on a quasi-spherical structure, and quantitative comparison among different methods is facilitated by an evaluation index such as a perfect closing index.

The invention relates to a quantitative soil splash erosion power monitoring system and method. A distance between a splash erosion disc of a soil splash erosion monitoring system and a video raindrop disdrometer of a rainfall monitoring system is maintained within 3m to 5m, the consistency of a rainfall area in which the rainfall monitoring system is located is guaranteed, and all parameters of the rainfall area suffering the rainfall are maintained consistent, so that the measurement and the calculation of raindrop kinetic energy, the sampling of splash erosion amount and the establishment of arelational expression between the raindrop kinetic energy and the splash erosion amount can be relatively precisely carried out, and the soil splash erosion amount in the selected rainfall area can be relatively precisely predicted. The quantitative soil splash erosion power monitoring system is convenient to operate and high in measure and control precision, utilizes a raindrop spectrum to generate the raindrop mass data and speed data, has the advantages of high precision, high speed, high efficiency, capability of clearly representing the raindrop mass and the raindrop speed, and the like in the event based rainfall process, and is wide in application range.

The invention discloses a crude oil single well metering and measuring system which comprises a shell, a main controller, a receiving terminal, a flow measuring assembly, a density measuring assembly and a temperature measuring assembly. The shell comprises an inner layer shell body and an outer layer shell body, and heat insulation cotton is arranged between the inner layer shell body and the outer layer shell body. A heat guide oil storage chamber is arranged in the inner layer shell body, and an explosion-proof box support is arranged on the outer layer shell body. An explosion-proof box is connected to the explosion-proof box support, and a transverter, an air switch and a tracing ribbon are arranged in the explosion-proof box. The tracing ribbon is located in the transverter. The air switch controls the tracing ribbon to be started and stopped. The flow measuring assembly is arranged in the inner layer shell body, and the density measuring assembly and the temperature measuring assembly are both arranged on the outer layer shell body. The flow measuring assembly, the density measuring assembly and the temperature measuring assembly are all in signal connection with the main controller, and the main controller is in signal connection with the receiving terminal. The metering precision of an oil well is improved, the using cost of an oil well metering instrument is reduced, and the metering efficiency of the oil well is improved.

The invention discloses a multifunctional electric energy measurement and control device and a measurement and control method thereof, relating to the technical field of electric energy measurement and control, and aiming to solve the problem that an existing electric power meter has a single function and cannot meet the requirements of digitization, intelligence and networking of a low-voltage power distribution system. The key points of the technical scheme are that: the device comprises measurement and control equipment, a parameter measurement module, a main control module, a switching value signal input module, a relay control module, a display module, a communication module and a computer module; and the parameter measurement module, the switching value signal input module, the relaycontrol module, the communication module and the display module are all in communication connection with the main control module, the communication module is in communication connection with the computer module, and the relay control module is in communication connection with the measurement and control equipment. The scheme of the invention has the effect that: the functions of electric quantitytelemetering, alarming, state remote communication, switch remote control, remote real-time monitoring and display for network communication and the like are integrated, so that the low-voltage powerdistribution system can achieve the effects of datamation, intelligence and networking.

The invention discloses a defocus measurement and control system and method for powder feeding type laser additive manufacturing equipment. The defocus measurement and control system comprises a computer numerical control system, wherein the computer numerical control system is bidirectionally connected with a man-machine interaction system and a distance sensor; the man-machine interaction systemis used for compiling programs, inputting parameters and visually displaying system state information; the computer numerical control system is respectively connected with a motion controller, a laser controller and a powder feeding controller through data cables; the powder feeding controller is connected with a powder feeding head through a powder feeding pipeline; the powder feeding head is arranged right opposite to a working plane; the distance sensor is arranged on the side wall of the powder feeding head; and the motion controller is used for controlling the movement of a machine tooland the powder feeding head. According to the defocus measurement and control system and method for the powder feeding type laser additive manufacturing equipment, the defocusing amount of the workingplane and the powder feeding head in the additive manufacturing process can be preset and monitored in real time, the process stability of each layer is improved, and the quality of a powder feedingtype laser additive manufacturing product is further improved.

The invention relates to an electrical device comprehensive property on-line intelligent measurement and control system, comprising an electrical device, a remote controller, an infrared sensing temperature rise measuring module, a switch device arc fault detecting and positioning module, a switch module based on vibration signal extraction, an on-line monitoring module, an intelligent evaluation module, a fault early warning module and an information interaction module. The remote controller sends a control signal to the electrical device, and is in communication with the infrared sensing temperature rise measuring module, the switch device arc fault detecting and positioning module, the switch module based on vibration signal extraction, the on-line monitoring module, the intelligent evaluation module, the fault early warning module and the information interaction module. The system has the characteristics of simple structure, convenient control, diversified function, low operation cost and stable operation, and realizes the comprehensive on-line monitoring of various performance states of the electric device; in addition, the system employs the special measurement and control technology, possesses high measurement and control precision, and realizes expert self-diagnosis.

The invention relates to a movable water loss and soil erosion laboratory which comprises a power and movable towing vehicle (2), a variable slope experimental groove (3), a down-spraying type sprinkler (4), a water supply system (5) and a water loss and soil erosion observation system (6); wherein, the power and movable towing vehicle (2) comprises a power towing vehicle (7), a mobile generator (8) and an external power source (9), and the power towing vehicle (7) comprises a driving cab (47), a carriage (22) and an experimental control room (38) positioned between the driving cab (47) and the carriage (22); the mobile generator (8) and the external power source (9) are positioned on the power towing vehicle (7). The invention overcomes the defects of poor mobility, complicated control as well as time-wasting and labor-wasting experiments of various field water loss and soil erosion experimental methods and experimental facilities. The movable water loss and soil erosion laboratory can be conveniently moved in various field experimental sites, and an observing and controlling system can be used for adjusting and controlling the rainfall intensity and the variable slope experimental groove, thus the use and the operation are convenient, and the observing and controlling accuracy can be high.

The invention relates to the field of bracing devices for foundation pit support structures, and specifically relates to a high-accuracy load control device for a support axial force, and a use methodthereof. The high-accuracy load control device for the support axial force comprises a jack (1), and is characterized by further comprising a reversing valve (2), a ball valve (41), an unloading valve (42), a high-pressure overflow valve (43), an oil pressure gauge (5), an oil pump (6), an oil tank (7), a stepper motor (8) and a controller (9), wherein a first oil inlet port of the reversing valve (2) is connected with an oil inlet end of the jack (1) through a first oil pipe (31); a second oil inlet port of the reversing valve (2) is connected with an oil outlet end of the jack (1) through asecond oil pipe (32); and the second oil pipe (32) is further connected with an oil unloading pipe (35). The high-accuracy load control device for the support axial force is compact in size, convenient to use, high in acceleration response, and high in adaptability.

The invention relates to an automatic feeding system for chemical production. The automatic feeding system comprises a feeding component, an online density measurement component, a differential pressure type liquid level measurement component and a pressure type flow sensor component. Problems about more on-site personnel, rough management, high potential safety hazard, frequent occurrence of safety production accidents and injuries to the personnel can be solved, problems about high randomness of on-site personnel in operation control, poor control accuracy, great affection on product quality, high production cost of products, failure in being effectively applicable to chemical industrial development and meeting safety requirements on the chemical production and the like are solved, product links can be effectively monitored and controlled, on-site personnel can be greatly reduced, and modern chemical production safety requirements are conformed to.

The invention discloses a rainfall erosion process measurement instrument and a measurement method thereof. The rainfall erosion process measurement instrument and a tripod fixed platform are arranged outdoors, and the rainfall erosion process measurement instrument is arranged on the tripod fixed platform. The screw is fixed; the rainfall erosion process measurement instrument includes a frusto-conical sputtering platform with an inner diameter of 20cm, an outer diameter of 100cm, and a height of 20cm. A 5cm-high concentric circle water tank is arranged every 10cm in width. The ring-shaped concentric water tanks are placed at a height of 15cm, 10cm, 5cm, and 0cm corresponding to the distance from the splash erosion table; different water inlet and outlet pipelines are connected to the concentric water tanks at various distances and heights. The present invention also relates to a method for measuring the rainfall erosion process by using the rainfall erosion process measuring instrument. The instrument can be used to measure the amount of splash erosion of soil particles of different periods, different rain intensities, and different qualities, and draw the rainfall erosion process line, which can clearly reproduce the rainfall. Erosion process, wide range of applications.

The invention relates to the field of bearing ring manufacturing and measuring devices and aims at providing a cold rolling measuring and controlling device for a workblank of a bearing ring. The cold rolling measuring and controlling device for the workblank of the bearing ring comprises a fixed seat, a sliding seat connected with the fixed seat through a transverse sliding rail, a measuring head fixedly connected with the sliding seat, a collision mechanism driving the measuring head to collide against the outer periphery of the workblank of the bearing ring, and a measuring and controlling device. When the cold rolling measuring and controlling device for the workblank of the bearing ring is used, the collision mechanism pushes the measuring head to collide against the outer periphery of the workblank of the bearing ring, the outer periphery of the workblank of the bearing ring enables the measuring and controlling device to act through the measuring head and the collision mechanism along with the expansion of the outer diameter of the workblank of the bearing ring during the cold rolling, and when the outer diameter of the workblank of the bearing ring reaches the specified value, the measuring and controlling device transmits a signal to a controller and then the controller controls a bearing ring cold rolling device to stop and get out of the cold rolling state. The cold rolling measuring and controlling device for the workblank of the bearing ring is relatively high in measuring efficiency and measuring precision.

The invention discloses a tractor static rollover stability test bed. The test bed comprises a base, a test platform, a power device, a drive device, safety protection devices, anti-sideslip devices and a measurement and control system, wherein a rack is arranged on the base, the drive device is mounted on the rack and connected with the power device and the test platform, the safety protection devices and the anti-sideslip devices are mounted on two sides of the test platform in the tractor driving direction, a wheel positioning device is arranged at the bottom of the test platform, and a signal output end of the measurement and control system is connected with a signal input end of the wheel positioning device and a signal input end of the test platform. The tractor static rollover stability test bed comprises a simple test process, has high measurement and control accuracy, can meet the requirements for stability and lifting speed of tractor static rollover stability tests and is high in carrying capacity and safe and reliable in operation. The invention also discloses a control method of the tractor static rollover stability test bed.

The invention relates to an integrated aircraft fuselage with a skin antenna, and belongs to the field of radar platform load integrated design. The aircraft fuselage comprises a left fuselage side wall mechanism, a right fuselage side wall mechanism, a fuselage top wall plate and a fuselage bottom wall plate; the two sidefuselage mechanisms have the same structure; each fuselage side wall mechanism is formed by transversely arranging and connecting a plurality of machine body side wall units; and each fuselage side wall unit comprises a fuselage frame composed of a pair of rod-shaped fuselage frame edges, an upper truss girder and a lower truss girder, a fuselage outer mask is arranged on the outer side face of the fuselage frame, two antenna unit sets are evenly distributed on the inner side face of the fuselage frame, and each antenna unit set comprises three or more antenna units. An integrated skin antenna array surface conformal with the fuselage is formed; and the plurality of antenna unit groups are electrically connected through connecting ribs, upper trussed beams and lower trussed beams to form an antenna array plane. The antenna array plane does not need extra supporting structures such as a hanging bin, a disc and a balance beam, and the load weight can be reduced by about 12%.