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

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 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 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 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 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 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 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 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%.