58results about How to "Reduce the error factor" patented technology

The invention relates to a method for measuring the mass concentration of a particulate matter. A processor controls a sampling pump so that airflow enters from a particulate matter collecting unit, atmospheric particulate matter information is acquired, whether an instrument needs to be calibrated is judged, a beta-ray calibration module is started to calibrate the parameter values of a light scattering measurement module if calibration is needed, and the light scattering measurement module is turned on after the parameters are calibrated; and if calibration is not needed, the light scattering measurement module directly carries out measurement. By combining a light scattering method for measuring the concentration of the particulate matter with a beta-ray method, the measurement is accurate and data are directly read on line in real time; the beta-ray calibration module and the light scattering measurement module share one gas path, so as to ensure that various conditions in the calibration process are consistent and reduce error factors; and the parameters of the light scattering measurement module are calibrated by using the beta-ray calibration module when the measurement environment is changed, and the light scattering measurement module is separately utilized to measure the concentration of the particulate matter when the measurement environment is not changed.

The invention discloses a quick measurement method and device of underwater sound transmitting transducer wideband sending response, and belongs to the field of the underwater sound transducer measurement. The method comprises the following steps: placing a to-be-measured underwater sound transmitter transducer in a reverb pool, producing wideband continuous white noise signals by a signal producer, and amplifying and stimulating the underwater sound transmitting transducer to emit a sound signal through a power amplifier, utilizing a standard hydrophone with known sensitivity at a reverb control area of the reverb pool, and measuring the reverb sound field space average sound pressure through the standard hydrophone by adopting a standard hydrophone space scanning motion method, and thencomputing the sending response of the underwater sound transmitting transducer. By adopting the method disclosed by the invention, the wideband measurement of the underwater sound transmitting transducer can be realized, the method has the advantages of being accurate in measurement result, simple in measurement step and high in efficiency; in the same reverb pool, the lower limit frequency measured by adopting method disclosed by the invention is lower than the lower limit frequency of the pulse sound technology.

The invention discloses a three pairs of sliding pair-spherical hinge-spherical hinge (3-PSS) mechanism-based coordinate measuring machine. The 3-PSS mechanism-based coordinate measuring machine is characterized in that: a three pairs of sliding pair-spherical hinge-spherical hinge parallel mechanism is provided; three motion sliding blocks are independently arranged on a pair of ball guide rails which are arranged in parallel and can slide freely along the ball guide rails respectively; the three motion sliding blocks are connected with one end of each of three pairs of link rods through one end of a universal joint respectively; the other end of each of three pairs of link rods are connected with a measuring moveable platform through the other end of the universal joint respectively; a measuring head is arranged on the lower plane of the measuring moveable platform; three indication gratings are fixedly connected to the three motion sliding blocks respectively; a scale grating and the pair of ball guide rails are arranged in parallel and are arranged on the guide rail mounting surfaces of guide rail cross beams; and the guide rail cross beams are suspended and fixedly connected to a pair of brackets. The 3-PSS mechanism-based coordinate measuring machine has high rigidity, a simple structure, high processing assembly property and low cost and can measure the three-dimensional space sizes, the shapes and the mutual positions of parts quickly and precisely.

The invention discloses a portable bus hydraulic punching machine and a punching method. The hydraulic punching machine at least comprises a hydraulic punching machine main body, a hydraulic punching machine bottom plate, a scale mother blank side bracket, a movable scale set I, a movable scale set II, a scale mother blank for positioning scales, and a protective upright post; a perforated fixed hydraulic punching machine and the scale mother blank side bracket are arranged on the hydraulic punching machine bottom plate; after supporting and accurately positioning the scale mother blank, the scale mother blank side bracket properly prolongs the length of the scale mother blank to the positive direction of the hydraulic punching machine main body, and keeps the height of the scale mother blank accordant with the punching plane of a hydraulic punching machine static impact mill; the scale mother blank is provided with two inverse trapezoidal positioning tenons for accurately positioningthe scale set I or the scale set II; and the scale set I is used for a vertical alignment method, and the scale set II is used for a planar alignment method. The portable hydraulic punching machine punches a bus based on the punching requirement of a bus connection form by using a scale I or a scale II with graduation as a reference of a bus punching circle center.

The invention discloses a feeding, discharging and positioning device suitable for a robot feeding and discharging flexible production line. A fork-shaped feeding and discharging device, a plurality of pull nails, an auxiliary workbench and a plurality of zero point positioning systems are included. The multiple pull nails are evenly arranged on a rapid replacement tray, two lug plates provided with positioning holes are arranged, and an RFID code is fixed to the corner. A robot flange assembly is fixed to the center of a transverse arm of a U-shaped fork-shaped assembly, a position sensor anda code reader are fixed to the two ends, and positioning pin installing holes for fixing positioning pins are formed in the two vertical walls. The zero point positioning systems are fixed to the positions, corresponding to the pull nails, of the auxiliary workbench. During work, the positioning holes of the rapid replacement tray are inserted and connected in the positioning pins of the fork-shaped assembly. The pull nails are arranged in pull nail zero point positioning holes of the zero point positioning systems, and inverted cone faces of the upper ends of the pull nails are clamped and connected in inverted cone holes of the zero point positioning systems. The feeding, discharging and positioning device is used in the robot feeding and discharging flexible production line, can adaptto diversity of workpieces and is high in recognition accuracy, good in grabbing reliability and high in zero point positioning precision.

The invention discloses a positioning system and positioning methods which can be used indoors. A method comprises the steps of S1, measuring a LBS (Location Based Service) base station coordinate, specifically, obtaining a mobile terminal GNSS (Global Navigation Satellite System) coordinate based on GNSS signal positioning features through utilization of an outdoor environment, sending a positioning request message by a mobile terminal to a positioning service center, sending a positioning message by the positioning service center to the mobile terminal, sending a positioning message reply message, computing the positioning message reply message to obtain a pseudo range from the mobile terminal to an LBS base station, and computing the LBS base station coordinate through utilization of the pseudo range and the GNSS coordinate of the mobile terminal; and S2, computing a mobile terminal coordinate, specifically, sending the positioning request message by the mobile terminal, sending thepositioning message by the positioning service center to the mobile terminal, receiving the positioning message by the mobile terminal and a WPS (Wide band Positioning Station), sending positioning message reply messages by the mobile terminal and the WPS to the positioning service center, comparing and computing the positioning message reply messages of the mobile terminal and the WPS to obtainthe pseudo range from the mobile terminal to the LBS base station, and computing the mobile terminal coordinate through utilization of the pseudo range from the mobile terminal to the LBS base stationand the LBS base station coordinate.

The invention, which belongs to the field of the measurement machine of numerical control precision measurement equipment, especially relates to an articulated arm type measurement machine with an articulated arm structure. The measurement machine arranged symmetrically along a ZX plane comprises five steering knuckles capable of moving freely and independently and seven connecting arm segments. The five steering knuckles are in a dual-point support mode and support points of all knuckles except the knuckle 4 are arranged symmetrically along the ZX plane; and the knuckles 1 and 4 are infinite rotation knuckles. The measurement machine has comprehensive advantages of flexible operation, high structural rigidity, and light weight and the like.

The invention discloses a positioning system and a positioning method capable of being used indoors. The positioning system capable of being used indoors includes the following four parts of: a mobileterminal, an LBS base station, a WPS base station and a positioning service center. The mobile terminal and the LBS base station can communicate with each other. The LBS base station and the positioning service center can communicate with each other. The WPS base station and the LBS base station can communicate with each other. The mobile terminal is connected with the positioning service centerthrough the LBS base station. The WPS base station is connected with the positioning service center 104 through the LBS base station. Through employing the system of the invention, impacts caused by network jitters on precise positioning can be avoided, and precise indoor positioning is achieved.

The invention discloses an automated ramp device which comprises a frame (9), a ramp (2), a lifting mechanism (5), a lifting arm (7), a tube seat (4), an oil tube propelling mechanism (8), hydraulic arms (12) and a tube seat lifting hydraulic cylinder (14). The ramp consists of a horizontal section and an inclined section; the hydraulic arms (12) are respectively arranged at the two sides of the horizontal section of the ramp (2); hydraulic arm extension hydraulic cylinders (10) and hydraulic arm lifting hydraulic cylinders (11) are arranged on the hydraulic arms (12); the lifting mechanism (5) is arranged in the horizontal section of the ramp (2) and is connected with the lifting arm (7); the tube seat (4) is arranged on the lifting mechanism (5); a sliding rail (6) is arranged in the lifting mechanism (5); the oil tube propelling mechanism (8) is arranged on the sliding rail (6); and the tube seat lifting hydraulic cylinder (14) is arranged at one side of the bottom of the tube seat (4). The automated ramp device has the advantages that the automation of oil tube delivery and unloading in oil exploitation can be realized, and the oil tube delivery efficiency is improved.

The invention provides a method for measuring the lighting diameter of a small-aperture diaphragm and the rotating angle of a driving lever. According to the method, a mach-zehnder interference system and a dual-optical wedge movement micrometer system are used for measuring the dimension of an image of the small-aperture diaphragm, so that the non-contact measurement on the diameter of the small-aperture diaphragm can be realized. The probability of man-made misreading can be reduced at an observation screen by adopting reticle design.

A method and an apparatus for measuring brake torque of an elevator are provided to accurately measure the torque of a brake of an elevator by uniformly maintaining the brake torque. An unbalance torque for rotating a driving pulley(18) by a weight difference between an elevator car(12) and a weight(22) is calculated based on the specifications of the elevator. A motor(26) is driven at a constant speed in a stat in which brake pads(30,32) of the elevator(10) make contact with a brake wheel(28). The output torque of the motor(26) is detected and a brake torque is calculated from the detected torque and the unbalance torque. The elevator(10) operates at a low speed. An apparatus for measuring the brake torque generated by the brake of the elevator(10) includes an unbalance torque acquisition unit for acquiring the unbalance torque.

The invention belongs to the field of oil and gas resource exploitation, and relates to a wellhead foam drainage gas production foam automatic detection device which comprises an automatic detection front end, a detection system part and a mechanical structure part. The automatic detection front end comprises a capacitance detection front end and an infrared detection front end, and the detection system takes an MCU as a core controller to realize acquisition, processing and transmission of a detection result; the mechanical structure part comprises a sealing lens, an infrared mounting head, an infrared sensor shell, an optical cavity, a processing system upper shell, a processing system lower shell, a detection front end upper shell, a detection front end lower shell, a detection capacitor, a capacitance sensor shell, a capacitor mounting head and a device shell. According to the device, the wellhead foam can be detected in real time, the accuracy and the real-time performance of detection are improved by adopting the capacitance detection front end and the infrared detection front end, the collected data are analyzed and processed by utilizing the micro-control system, the result is automatically transmitted to the mobile terminal, and the automatic control is completed.

The invention discloses a high-speed wireless dynamic weighing sensor system. The system includes a weighing sensor, a power supply system, a Wheatstone bridge, an AD data collection card, a battery detector, a CPU, a temperature sensor, a control relay, a storage card and a power consumption control system. The power supply system is respectively and electrically connected with the Wheatstone bridge and the battery detector. The Wheatstone bridge is electrically connected with the AD data collection card. The weighing sensor is electrically connected with the AD data collection card. The battery detector is electrically connected with the CPU. The weighing sensor in the system of the invention has only one externally connected antenna, on-site installation and construction are enabled tobe more convenient, human error factors are reduced, construction costs are reduced, the weighing sensor system uses almost no wire joint on 32 sensors as compared with wired sensors, costs are greatly reduced, too much invalid data collection and transmission can be avoided through the power consumption control system, and system running efficiency is improved.