134results about How to "Affect measurement accuracy" patented technology

The invention provides a concrete material in-high-temperature compression testing machine and an in-high-temperature compression testing method. The concrete material in-high-temperature compression testing machine comprises loading equipment for applying pressure on a concrete test-piece, heating equipment for heating the concrete test-piece, and a displacement acquisition device for measuring the deformation of the concrete test-piece. According to the concrete material in-high-temperature compression testing machine, the heating equipment and the loading equipment for concrete testing are skillfully combined together, and are assisted by the displacement acquisition device, so that a comprehensive testing system capable of being used for concrete test-piece in-high-temperature compression testing is formed, synchronization of heating and loading is realized, a concrete environment in high temperature due to fire can be truly simulated, a test result obtained by performing a concrete material test through the concrete material in-high-temperature compression testing machine is very close to actual compressive property of concrete in high temperature due to fire, and a guarantee is provided for researching high temperature performance and fire resistance of a concrete material.

The invention discloses a method and a device for testing a gas combustion nozzle. The method is characterized in that a combustible gas and high-pressure air are connected into a nozzle to be tested, so as to generate a vortex saturated mixed gas in the nozzle, the mixed gas combusts when meeting an electric spark generated by a pulse igniter so that a torch is formed, the color, the length and the shape of the flame are observed, and the highest temperature of the flame and the content of harmful gases exhausted to air are detected by using a sensor so that a design basis is provided for the application of the combustion nozzle. According to the method and the device, the pollution of the various harmful gases to the environment can be reduced when the existing energy resources are maximally utilized; the device has the function of objectively evaluating the structure design of the nozzle in the detection of combustion nozzles with different fuels as combustion mediums and different structures, and is good in popularization and application values, and the optimal air-fuel ratio of various kinds of nozzles or a certain nozzle can be found.

The invention discloses a variable-gravity orientation typical friction pair sliding abrasion tester and a test method. The variable-gravity orientation typical friction pair sliding abrasion tester comprises a bracket, a vacuum box, an index plate, a loading mechanism, a sample fixture, a sample clamping mechanism and a friction sensor for detecting friction force generated by friction between a fixed sample and a movable sample, wherein the vacuum box is arranged on the bracket through the index plate; the sample fixture and the sample clamping mechanism are arranged in the vacuum box. By adopting the variable-gravity orientation typical friction pair sliding abrasion tester and the test method, the change of the friction force of a typical friction pair under different gravity orientations in a vacuum environment can be measured accurately, the influence of a gravity effect on abrasion can be analyzed, and the influence of an alternating load on the abrasion of the typical friction pair can be measured.

The invention relates to a power joint device. The device comprises a joint body, a power device and a measuring device; the measuring device comprises a first angular measuring device, the first angular measuring device comprises a first magnet and a first magnetic field induction circuit, the first magnet is connected with one end of a motor output shaft, and is close to a first motor cover plate, the first magnetic field induction circuit is arranged on the inner side of the first motor cover plate and is close to the first magnet, a motor rotates to drive the motor output shaft to rotate,and further drive the first magnet to rotate, and the first magnetic field induction circuit induces the rotating angle of the first magnet so as to measure the rotating angle of the motor. Through the first magnet and the first magnetic field induction circuit which are in the non-contact coupling manner, measuring of the motor rotating angle is achieved, mechanical friction losses are avoided, simpleness, lightness, thinness and low cost are achieved, compared with an existing integrated type encoder scheme, mechanical structural design complexity is greatly simplified, a magnetic field generated by the magnet is a static magnetic field, the environment interference influence is avoided, and reliability is high.

The invention provides an automatic exploitation measuring device and control method of a coal bed gas well. The measuring and control method is used for controlling a working fluid level by controlling the casing pressure of the coal bed gas well so as to stop the using of a traditional gas-liquid separator on the gas well field; requirements on gas production rate measurement can be satisfied by using a gas flowmeter; meanwhile, the liquid is separated from solid-phase coal powder and a gas after produced to the ground and before passing through a liquid flowmeter, thus the measuring accuracy is improved; the measurement is realized and the measuring accuracy is also increased while the liquid production rate is very small. A produced liquid measuring device, a produced gas measuring device and a control box provided by the invention are respectively mounted on a base bracket to form a highly integrated automatic exploitation measuring and control system of the coal bed gas well; therefore, the parameters are measured and field equipments on the well field are also simplified; the device is very simple and convenient to move, mount, operate, use and maintain; moreover, the invention also provides an optimized exploitation control method of a coal bed gas well.

The invention provides a sensor calibration system, a control method and a control device thereof. The sensor calibration system comprises a measurement sensor, a calibration sensor and a controller, wherein the measurement sensor is arranged in an open space. The calibration sensor is arranged in a housing structure, wherein the housing structure comprises a fixed part, a movable part and a transmission part which is connected with the movable part. The transmission part can drive the movable part to reciprocate according to a control instruction. Furthermore when the movable part seamlessly abuts against the fixed part, the movable part and the fixed part form a closed space; when the movable part does not abut against the fixed part seamlessly, the movable part and the fixed part form an open space. The controller is connected with the measurement sensor and the calibration sensor and transmits control instruction to the transmission part. The sensor calibration system can output accurate sensor data after long-term use of the sensors.

The invention belongs to the technical field of nucleus technology application, and relates to an on-line analysis device of pulsed neutron coal element content and proximate analysis indexes. The on-line analysis device comprises a radiation protector, a coal conveying channel and a detection device; the coal conveying channel and the detection device are arranged in the radiation protector; the detection device is positioned below the coal conveying channel; the detection device comprises a neutron detector, a pulsed D-T neutron generator and a BGO (bismuth germanium oxide) detector and is characterized in that a lead plate a, a polyethylene plate and a lead plate b are sequentially arranged between the pulsed D-T neutron generator and the BGO detector; and the BGO detector is positioned in a BGO detector constant temperature control system, with a temperature range kept at -4.5 DEG C to -5.5 DEG C. According to the invention, the on-line analysis device is not influenced by parameters such as changes of coal type, speeds of a belt for conveying coal, thickness changes of coal seams, particle sizes of coal and the like, so that the precision for measuring parameters of coal property is high.

The embodiments of the invention disclose an absolute grating ruler and a displacement measuring method. The absolute grating ruler includes a light source, a lens group, a signal processor and an image sensor array. After collimating and focusing a light beam emitted by the light source, the lens group emits the light beam to the image sensor array. The image sensor array collects light information, converts the light information into electricity information and sends the electricity information to the signal processing module. The signal processor carries out analog-to-digital conversion onthe electricity information to get the gray value of each photosensitive element in the image sensor array, and selects the maximum gray value from the gray values, wherein a target photosensitive element position corresponding to the maximum gray value is a target spot position. The signal processor obtains the position value of a target photosensitive element according to a pre-stored order of the image sensors and the arrangement information of the photosensitive element in each image sensor, and calculates the absolute position measured value of a target spot according to the position value of the target photosensitive element. The image sensor array is used to replace an absolute code path, which saves the manufacturing cost and improves the measurement accuracy and response speed.

The invention relates to a liquid level anti-blocking device for a chilling chamber of a gasification furnace. The liquid level anti-blocking device comprises a pressure taking pipe communicated with the chilling chamber and a flange type pressure transducer mounted at the outer end of the pressure taking pipe, wherein a flushing water ring is arranged between the pressure taking pipe and the pressure transducer; a through hole for communicating the surface of a film box of the pressure transducer with the pressure taking pipe is formed in the middle of the flushing water ring; a water inlet channel communicated with an external pipeline is formed in the side wall of the flushing water ring; a water outlet of the water inlet channel is formed in the end face of the flushing water ring on one side of the pressure taking pipe; a flushing water pipe, of which one end is connected with the water outlet formed in the end face of the flushing water ring, is arranged in the pressure taking pipe; the outlet end of the flushing water pipe is arranged in the pressure taking pipe leading to one side of the chilling chamber. High-pressure flushing water is led to one side close to the chilling chamber, so that settling of smudgy mediums can be prevented, the service life of a liquidometer can be prolonged, and the safety of gasification furnace running is improved.

The invention relates to an intelligent dehumidification device of an atmospheric particulate matter sampler. The intelligent dehumidification device is characterized by comprising a conical cover, an inverted U-shaped dehumidification device, a steel pipe and three humidity sensors, wherein a conical flow guide plate is arranged on the inner wall of the conical cover; a circular through hole for holding one of the humidity sensors is formed in the side surface of the conical cover; the conical cover is connected with a steel wire mesh through a thread; a first vertical section of the inverted U-shaped dehumidification device is sleeved with a condensing sleeve, and the bottom end of the first vertical section is connected with the conical cover; a second vertical section of the inverted U-shaped dehumidification device is sleeved with a heating sleeve, and the bottom end of the second vertical section is connected with the steel pipe; an arc section is provided with a circular through hole for holding another humidity sensor; the top end of the steel pipe is connected with the bottom end of the second vertical section; a circular through hole for holding the last humidity sensor is formed in the lower part of the steel pipe; a signal processing system in an electronic control system can judge humidity signals received from the three humidity sensors in real time and adjust the working states of the condensing sleeve and the heating sleeve by controlling the on or off of corresponding electronic power switches according to judgment results.

A horizontal and vertical deformation combined testing method for deep-layer rock bodies or soil bodies is disclosed. The method includes drilling a testing hole, mounting a horizontal and vertical displacement combined testing device for the deep-layer rock bodies or soil bodies, backfilling and protecting the testing hole, and performing measurement with instruments. The combined testing hole is utilized in the method, and therefore half of the testing cost is saved, and a horizontal and vertical three-dimensional deformation at a point of a rock body or a soil body can be obtained. In addition, a novel vertical settlement magnetic ring device and a backfilling method can greatly increase the testing precision. The method can meet safety monitoring projects requiring high precision, such as deformation monitoring of tunnels, high slopes, deep foundation pits and dam bodies.

The invention relates to a non-contact laser precise cylindrical gear profile radial eccentricity detection method. A numerical value optimization model is established according to the range of a laser displacement sensor, the included angle between laser light and a profile normal line and other factors, the best installation position and the angle of the sensor are further obtained, and the problems that the detection precision is influenced due to elongation of a laser spot and an over large measuring angle can be avoided. The laser light is struck on a measured profile, the gear rotates ata constant speed around a rotation center, and data of each measured point of a single-sided profile of the gear are further measured. The installation angle of the sensor is adjusted, and in the same way, the data of each measured point of the profile at the other side of the gear can be measured. The data measured under two attitudes of the sensor are fused, processing is carried out based on the geometric relationship between the sensor and the gear: based on least squares linear regression, the initial calculation values of the gear profile radial eccentricity and the initial eccentric angle are obtained; and by using iterative cycle approximation of a Jacobian gradient matrix, the exact solutions of the gear profile radial eccentricity and the initial eccentric angle can be obtained.

The present invention provides a P2O5 minim moisture sensor capable of rapidly measuring. The P2O5 minim moisture sensor comprises a device body, a base and a sensor core, wherein the device is hollow, is arranged on the base, and is provided with a sampling gas inlet and a sampling gas outlet, the sensor core is fixed inside the device body through a support structure, the inner cavity of the device body is divided into two separate spaces such as an upper separate space and a lower separate space through the support structure, one end of the sensor core is positioned in the upper separate space, the other end is positioned in the lower separate space, the device body is further provided with a bypass gas outlet, the bypass gas outlet is communicated with the upper separate space, the sampling gas outlet is communicated with the lower separate space, and gas to be detected is divided into two parts so as to be discharged, wherein one part passes through the upper separate space and is discharged from the bypass gas outlet, and the other part passes through the sensor core, enters the lower separate space, and is discharged through the sampling gas outlet. According to the present invention, the P2O5 minim moisture sensor has characteristics of simple structure, high measurement accuracy, fast measurement, corrosion resistance, and reliable sealing effect.

The invention, which belongs to the technical field of measuring instruments, particularly relates to an inner cavity diameter measuring device of a hub. The device comprises a left vernier scale, a right vernier scale, a measuring instrument body, a positioning component and a fastening component. The positioning component is used for being inserted into the positioning center of a wheel center hole; the left vernier scale or the right vernier scale is inserted into a lower scale slot or an upper scale slot and slides; and the rightmost end of the right vernier scale and the leftmost end of the left vernier scale are in contact with the inner cavity wall respectively. The fastening component fixes the left vernier scale and the right vernier scale in reading to eliminate the influence onthe measurement accuracy and accuracy by movement of the left vernier scale and the right vernier scale. With the provided device, the measurement of the inner diameter of the hub with the inverted-mode cavity reducing chamber is realized; the measurement is accurate with high precision; the device is convenient to operate with high universality; and the function of measuring the inner cavity withthe irregular structure is realized, wherein the traditional measuring tool can not realize the function.

The invention discloses a high-precision low-power electromagnetic flow sensing device. The device comprises a measuring tube, an upper magnetic plate, a first electrode, a second electrode, a coil, amagnetic core, a U-shaped magnet and a lower magnetic plate, a through hole of the measuring tube is divided into an upper through hole and a lower through hole by the upper magnetic plate, the lowermagnetic plate is arranged below the lower through hole of the measuring tube, the first electrode and the second electrode are respectively located on both sides of the lower through hole of the measuring tube, the coil horizontally surrounds the magnetic core, the magnetic core is located below the lower magnetic plate, and is placed in the U-shaped magnet, and the upper magnetic plate, the magnetic core, the U-shaped magnet and the magnetic plates are all magnetic conductors. The device has the advantages of small magnetic gap of an excitation magnetic field, high excitation efficiency, low power consumption, more uniform magnetic field distribution, high sensor precision and the like.

The invention discloses a synchronous suspension control method for a horizontal-axis wind-power cabin. Suspension control of a traditional cabin is changed into independent control of the two sides by taking a suspension air gap as a target, and a control strategy integrating cabin suspension height and suspension synchronization is provided; and meanwhile, for the problem that the disturbance ofthe cabin suspension caused by external high-frequency or turbulent wind speed is fast time-varying interference, and the cabin suspension performance is extremely prone to damage, a sliding mode item and an adaptive interference compensation term are introduced to coordinately reconstruct the cabin suspension axial and pitch interference, and a sliding-mode adaptive axial and pitch interferenceobserver is proposed to achieve a steady suspension of the wind cabin with the weight up to 484 kg along with axial and synchronous controllers. According to the method, the suspension stability, fast-change interference suppression and two-side synchronous tracking performance of the cabin are greatly improved, the two-point suspension synchronization performance and the fast-change interferencesuppression capability of the cabin are effectively improved, and meanwhile the method has a strong guiding significance for multi-point suspension control of heavy suspended matters.

The invention discloses a flue gas measuring device which comprises a plurality of first sampling pipes distributed on the cross section of an outlet flue of a denitration device in a matrix mode, each first sampling pipe is provided with a plurality of trumpet-shaped sampling holes at equal intervals, all the first sampling pipes are jointly connected to a collecting pipe, one end of the collecting pipe is connected with a flow equalizing pipe, the middle part of the flow equalizing pipe is connected with a sampling pipe, the sampling pipe samples flue gas in the flow equalizing pipe and then conveys the flue gas into a flue gas pretreatment system through a composite sampling pipe, the flow equalizing pipe is communicated with an air pre-heater outlet steering chamber through a return pipe, and a dilution cooler is also connected between the collecting pipe and the flow equalizing pipe. The dilution cooler can divide flue gas into two parts, one part is diluted after being pre-cooled and then is further cooled, and the cooled and diluted gas is fully stirred and mixed with high-temperature flue gas in the heat tracing pipeline, so that the flue gas is fully mixed with the high-temperature flue gas in the heat tracing pipeline. The influence on the measurement precision caused by cooling nucleation or water vapor condensation into beads due to too low cooling temperature can be further prevented.

The invention discloses a tactile feedback ankle joint functional training system based on a brain-computer interface. The tactile feedback ankle joint functional training system comprises a trainingchair for a user to train and use, a user interface module, an electroencephalography collecting and treating module and a control feedback module, wherein the user interface module comprises a display screen and a host computer, and can provide a cartoon based on steady-state visual sense inducing to allow the user to watch; the electroencephalography collecting and treating module is used for performing collecting, filtering treatment and amplifying treatment on generated eeg signals after the user watches the cartoon, and transmitting the treatment result to the control feedback module; andthe control feedback module is used for controlling the intensity and the frequency of a vibrating module through a single chip microcomputer according to the eeg signals, and performing vibration training on shank muscle of the user, and the user can control the position of training lateral vibration through an active intention. According to the tactile feedback ankle joint functional training system disclosed by the invention, a brain-computer interface manner is adopted, and the eeg signals of the user are extracted to perform tactile training, so that active intention training is realized; and based on the training of steady-state visual sense inducing technique, the gait cycle in a walking process is simulated, and the proprioceptive sensation and abnormal gait training of the user are facilitated.