9results about How to "Small margin of error" patented technology

The invention relates to the field of road maintenance and traffic safety, and relates to a road maintenance operation area safety management and control system, which comprises a cloud platform, an intelligent road cone, a flash warning device, maintenance personnel wearable equipment, a construction warning sign state detector, a construction area vehicle intrusion alarm instrument and a satellite base station, the server is used for performing real-time communication with an intelligent road cone, a flash warning device, maintenance personnel wearing equipment, a construction warning sign state detector, a construction area vehicle intrusion alarm instrument, a satellite base station and a vehicle navigation terminal through 5G wireless transmission equipment, processing and analyzing various data and issuing safety early warning information; a positioning module, a monitoring module, a warning module, a power module and a control module are arranged in the intelligent road cone, and the intelligent road cone is used for defining a maintenance operation area; and the satellite base station is deployed at a construction site commanding height, provides centimeter-level positioning reference and synchronously corrects coordinates of each device. The problem that the risk of accidents is remarkably increased is solved.

The utility model relates to the technical field of cable tie tension test, and disclose stainless steel cable tie tightening tool tension test metering appearance, including the shell, the inside of shell is inlayed and is equipped with signal processing terminal, the bottom of signal processing terminal is inlayed and is equipped with the charging mouth, the surface fixed mounting of signal processing terminal has display screen, the top of signal processing terminal is inlayed and is equipped with force sensor, the feeler rod of force sensor is detachably installed with movable clamp holder. This stainless steel cable tie tightening tool tension test metering appearance, when using stainless steel cable tie tightening tool tightens the cable tie, and the tension of cable tie is passed to force sensor through the movable clamp holder of metering appearance. Force sensor converts tension into electric signal, and the electric signal is handled after signal processing terminal, and is displayed in digital form on display screen in real time. The operating personnel can adjust the operating strength of stainless steel cable tie tightening tool according to the tension numerical value of display, to reach the suitable cable tie tightening tension.

The utility model discloses a tobacco leaf pit digging and mouth fertilizer applying all-in-one machine, and belongs to the field of tobacco leaf planting, the tobacco leaf pit digging and mouth fertilizer applying all-in-one machine comprises two installation frames and a traction rod, the two installation frames are both rotatably connected with one side of the traction rod, the interiors of the installation frames are fixedly connected with fixed wheels, and one side of each fixed wheel is rotatably connected with a rotating disc. The duckbilled box is matched with the opening and closing plate, the L-shaped rod and the tension spring to form a mechanical control structure, precise fertilization is achieved, in the initial state, the tension spring is stretched to generate elastic tension, the L-shaped rod is kept stable, the opening and closing plate is driven to be closed, and fertilizer is prevented from being scattered, and when the duckbilled box rotates to the fixing plate along with the rotating disc, a protruding block on the plate makes contact with the L-shaped rod and exerts pushing force to overcome the elastic force of the tension spring; the L-shaped rod is driven to rotate around the hinge point, the opening and closing plate is synchronously driven to be opened, the fertilizer in the duckbilled box is immediately applied into a dug pit, the purpose of digging the pit and applying the fertilizer at the same time can be achieved by opening and closing the opening and closing of the duckbilled box, and time and labor cost are saved.

This utility model relates to the field of gas annular calibration box technology, and discloses a gas annular calibration box, including a calibration box, on which a detector placement module is provided. A support plate is fixedly connected to the concave surface of the detector placement module. A screw is fixedly connected to the support plate via a motor. A moving block is threadedly connected to the screw. Through the design of the angle adjustment component inside the device, the comprehensiveness and accuracy of detection can be effectively improved. Existing technology fixes the detector in a single position, making it difficult to capture the uneven gas concentration distribution inside the annular box. The adjustable angle design allows the detector to contact the delivered gas at different positions during the detection process, simulating the complex scenario of combustible gas leaking from various directions in actual applications. It can accurately obtain the detector's response performance to gas in various directions, avoiding performance misjudgment caused by a single detection direction, and effectively improving the comprehensiveness and accuracy of detection.

The utility model relates to the technical field of conveyor belt on-line weighing devices, in particular to a short conveyor belt on-line weighing device, which comprises a driving roller and an auxiliary roller, a conveyor belt is mounted on the driving roller and the auxiliary roller, a weighing roller is mounted in the conveyor belt, a buffer mechanism is arranged on the weighing roller, the buffer mechanism comprises a damper, and the damper is arranged on the conveyor belt. And a damping adjusting mechanism is arranged between the driving roller and the damper. The damping adjusting mechanism is arranged to be matched with the damper, so that the passing area of an oil passing hole in the damper can be automatically adjusted according to different rotating speeds when the rotating speed of the conveying belt is adjusted or the conveying belt is started and stopped, the damping of the damper is changed, self-adaptive damping adjustment is achieved, and the service life of the conveying belt is prolonged. Therefore, the damping is automatically changed when different rotating speeds of the transmission belt correspond to different vibration frequencies, the vibration buffering effect is improved, and the weighing precision is effectively improved.

The utility model relates to the technical field of urban rail transit engineering vehicle equipment, in particular to an urban rail transit engineering vehicle air cylinder pressure acquisition plug-in which comprises a power supply part, a pressure signal sampling module, a pressure channel selection module, an AD conversion module, a signal isolation module, a main control module and a communication module. The power supply part is used for realizing various power supply conversion and protection functions and supplying power to other modules; the pressure signal sampling module is used for carrying out operational amplification processing on 0-5V voltage signals output by the voltage type pressure sensor; the pressure channel selection module is used for selecting five paths of pressure signals and pressure self-checking signals under the control of the CPU; the AD conversion module is used for converting the pressure signal into a digital signal; the signal isolation module is used for realizing isolation between a pressure signal and a main circuit; the stability of the air cylinder pressure acquisition data of the urban rail transit engineering vehicle can be improved.

The invention discloses a manufacturing method of a thin-film acoustic metamaterial composite sound insulation board, relates to the technical field of noise control, and aims to solve the problems that an existing thin-film acoustic metamaterial sound insulation board is narrow in sound insulation frequency band, core components are prone to damage, the structure is unstable, the machining precision is low, and the process adaptability is poor. The sound insulation plate comprises a porous sound absorption plate, a micro-perforated plate, a reinforcing grating and a protective layer, the reinforcing grating is of a frame type structure, the porous sound absorption plate is mounted in the reinforcing grating in a filling manner, the porosity of the porous sound absorption plate is linearly decreased from outside to inside, and the micro-perforated plate and the protective layer are sequentially mounted on the outer surface of the reinforcing grating filled with the porous sound absorption plate; the base plate comprises protective layers, clamping plates and a resonance film set, the resonance film set is composed of 2-3 layers of sound insulation films, an elastic damping layer is arranged between every two adjacent sound insulation films, the resonance film set is arranged between the two clamping plates, and the protective layers are arranged on the outer walls of the two clamping plates; the base layer plate is arranged between the two layers of sound insulation plates which are symmetrical in structure, and the reinforcing grating filled with the multi-hole sound absorption plates is connected with the protective layer of the base layer plate. 20-1600Hz broadband efficient sound insulation is realized, the structure is stable and durable, the product consistency is good, the weight is light, and the construction is easy.

The application provides a one-key powder production secondary regulation temperature intelligent control method and system, relates to the technical field of intelligent management, and the method comprises the following steps: the mill outlet temperature is between the first lower limit and the second lower limit, and the mill inlet temperature is not higher than the upper limit of the inlet temperature; at this time, the coal gas flow setting value is continuously increased; if the outlet temperature is too low, the mill inlet temperature is lower than the lower limit; at this time, the coal gas is not adjusted; if the mill outlet temperature is between the third lower limit and the fourth lower limit and below the fourth lower limit, the coal is reduced and adjusted. The application effectively controls the abnormal fluctuation of the mill outlet temperature, and ensures that the subsequent coal injection process will not be affected by the unqualified coal powder moisture.

The invention discloses an automatic feeding device for polycrystalline alumina fiber spinning colloid preparation, and relates to the technical field of chemical material addition, material addition is carried out by adopting a mode of storing materials in a first hopper and feeding the materials in a second hopper, and the materials are divided into a plurality of feeding batches; the weight change before and after the first hopper outputs the materials and the weight change before and after the second hopper inputs the materials and before and after the materials are output are recorded each time before the last time, the total material adding error obtained before the last time of feeding is obtained from the weight change, and the total amount of the materials needing to be added and the weight of the added materials are combined. According to the automatic feeding device, automatic feeding can be achieved through the discharging switch and the discharging device, errors caused by manual operation are reduced, the exposure time of raw materials is short, and dust exposure and environmental pollution are reduced; through repeated weighing and error feedback control, the raw material adding weight can be more accurately controlled, and the error range is reduced to the maximum extent.