42results about How to "Continuous and precise measurement" patented technology

A system and method autonomously and precisely track objects moving along a known course. The objects include, for example, racing horses, other racing animals, or racing vehicles. The system and method utilize modern satellite navigation satellite systems, signal processing, radio communications systems and computer processing to acquire and analyze performance data of the moving objects during competitions and during training and practice. The data acquisition is performed continuously at a rate of at least 1 Hz during the competition, training or practice even in the presence of objects which affect the quality of the signals received from the satellite system.

The invention discloses a distributed optical fiber temperature measuring and sensing device with automatic temperature calibration and a use method thereof, and is characterized in that a beam output end of a coupler is connected with a beam input end of a thermotank, and a temperature controlling module is arranged inside the thermotank, which is doubly connected with a data acquisition unit, and compared with traditional optical fiber temperature measuring and sensing devices, the distributed optical fiber temperature measuring and sensing device has the following advantages: 1. the device is not required to be returned to factories for measuring and debugging, thus saving resources and funds; 2. the device realizes self calibration, thus maintaining continuously precise measurement for a long time; 3. the accuracy and precision of temperature calibration is greatly improved; 4. the time and number of the project operation and cease are greatly reduced.

A dynamic pressure probe includes a holder body having a first passage therein adapted to receive a pressure signal, a pressure sensor including at least a pressure sensing portion located within a sleeve seated within a pressure sensor housing portion, the sleeve engaged with a wall of the housing portion; the pressure sensor including a diaphragm having one face exposed to a pressure chamber within the sleeve between the pressure sensor and the wall; wherein an aperture in the wall of the housing connects the pressure chamber to the first passage; and wherein the first passage continues axially beyond the aperture in a flow direction an acoustic damping coil wound about a vertical axis.

A vehicle-installed exhaust gas analyzing apparatus includes a nondispersive infrared (NDIR) type gas analyzer for continuously measuring concentration of hydrocarbon (HC) in an exhaust gas flowing through an exhaust pipe which is connected to an engine, an exhaust gas flowmeter for continuously measuring flow rate of the exhaust gas flowing through the exhaust pipe, and an operation processing device for processing outputs from the NDIR type gas analyzer and the exhaust gas flowmeter to continuously calculate mass of total hydrocarbon (THC) contained in the exhaust gas. The components are configured so at to be installable in vehicle. THC concentration is obtained by multiplying a measurement result obtained by the NDIR type analyzer by a predetermined conversion factor.

The invention discloses a system for estimating growth conditions of field crops. The system comprises a field working machine and a remote management terminal, wherein the field working machine is used for collecting a crop canopy image in a field, so as to obtain an angle value measured by an angle sensor, and longitude and latitude values for positioning a working region; sending the crop canopy image, the angle value and the longitude and latitude values to the remote management terminal, wherein the angle value is related to the value of the hardness of crop straws and the value of the density of the crops; storing and processing the received crop canopy image, angle value and longitude and latitude values by the remote management terminal to obtain an operation instruction of the field working machine; sending the operation instruction to the field working machine. The invention further provides a method for estimating the growth conditions of the field crops; in the method, data including gravity, bending acting force of a connection rod, horizontal acceleration, the crop canopy image and the like are comprehensively adopted; under the condition of not damaging the crops, the continuous and accurate measurement on the straw hardness and the plant density of the crops can be realized without manual operation, and a crop growth condition picture is drawn.

A telescopic shock absorber, having: a housing; a cavity located within the housing and containing a liquid and a gas; and a sensor for measuring the level of the liquid in the cavity. The sensor has: a first waveguide having a first end and a second end; and a communications interface operable to transfer electrical signals between the first waveguide to the exterior of the housing, wherein the first waveguide is arranged such that when the shock absorber is in normal use the first end is surrounded by the gas and the second end is immersed in the liquid.

A stethoscope system includes a wearable stethoscope patch to be worn by a user that includes a substrate, an accelerometer in the substrate, the accelerometer configured to sense acoustic pressure waves in the user's body to produce a first electrical signal, and an antenna over the substrate and in electric communication with the accelerometer, wherein the antenna is configured to wirelessly transmit measurement data based on the first electrical signal. The wearable stethoscope patch also includes a control device that receives the measurement data wirelessly from the antenna and produces stethoscopic data based on the measurement data.

The invention provides a measuring method for a water-containing coal and rock down drill hole gas pressure observation system, and belongs to the technical field of mine gas pressure measurement. The measuring method concretely solves the problem that the gas pressure cannot be measured in a down drill hole due to water accumulation. The measuring method comprises the following steps that: firstly, a drill hole is drilled; then, experiment hardware is prepared, and the experiment hardware comprises a water permeable device, a sealing and blocking device and a pressure measuring device; next, the water permeable device is arranged in the drill hole, the gap between the water permeable device and the drill hole is filled by filling materials, and after the filling materials are cured, a pressure withstand test is performed for detection; then, the drill hole is sealed for secondary pressure withstand detection, and water in the drill hole is discharged out; and finally, the gas pressure measurement is performed through relevant auxiliary equipment. The measuring method has the advantages that the defect of influence on the gas pressure measurement caused by the water in the down drill hole can be better overcome, and the measuring method is particularly applicable to the gas pressure measurement in the water-containing coal and rock down drill hole.

The invention discloses a distributed optical fiber temperature measuring and sensing device with automatic calibration and a use method thereof, and is characterized in that an output end of an optical maser is connected with an input end of a branching unit, an output end of the branching unit is respectively connected with an input end of a coupler and an optical signal detector, an output end of the optical signal detector is connected with an input end of an adjustor, an output end of the adjustor is connected with an input end of a signal amplifier, an output end of an isochronous controller is connected with an input end of the optical signal detector and a data acquisition unit, an input end of the isochronous controller is connected with an output end of a data processor, and an input end of the data processor is connected with an output end of the data acquisition unit. Compared with traditional optical fiber temperature measuring and sensing devices, the distributed optical fiber temperature measuring and sensing device with automatic calibration gain has the following advantages: 1. the device is not required to be returned to factories for measuring and debugging, thus saving resources and funds; 2. the device can maintain continuously precise measurement for a long time; 3. the time and number of the project operation and cease are greatly reduced.

An apparatus for BTU measurement of natural gas having at least one reference spherical acoustic resonator containing a reference gas, a sample gas spherical acoustic resonator containing a natural gas sample, a first acoustic transmitter adapted to transmit a first acoustic signal into the natural gas sample, a second acoustic transmitter adapted to transmit a second acoustic signal into the reference gas, a first acoustic receiver adapted to receive at least a portion of the first acoustic signal, and a second acoustic receiver adapted to receive at least a portion of the second acoustic signal. Using the third radial resonance frequencies for the sample gas and reference gas, a data processor operably connected with a signal output of the first acoustic receiver determines the specific gravity of the natural gas sample. The discovered linear relationship between specific gravity and heating value of natural gas enables a determination of the heating value from the measured specific gravity.

The invention discloses an engine fuel oil supply system and a fuel oil supply control method. The engine fuel oil supply system is used for controlling fuel oil supply of an engine and comprises a fuel oil pump and a power unit for driving the fuel oil pump; the oil inlet of the fuel oil pump is connected with a fuel tank; the oil outlet of the fuel oil pump is connected with a combustion chamberof the engine; the power unit is in communication connection with an electronic controller of the engine; a fuel oil metering device for controlling the metering fuel oil entering the combustion chamber is arranged on a pipeline through which the oil outlet of the fuel oil pump is connected with the combustion chamber of the engine; and the fuel oil metering device comprises a high-speed controlvalve for realizing continuous supply or cutoff of the fuel oil as well as a pressure pulsation absorber for enabling the fuel oil to be continuous and stable. The high-speed control valve is in electric signal connection with the electronic controller; the oil inlet of the high-speed control valve is connected with the fuel oil pump; and the oil outlet of the high-speed control valve is connectedwith the pressure pulsation absorber. The oil outlet of the pressure pulsation absorber is connected with the combustion chamber of the engine.

A cell culture apparatus is provided which can continuously and accurately measure turbidity of a cell culture solution and culture a cell, without inserting a turbidity sensor from outside into a sterile bag. The cell culture apparatus includes: a flexible and transparent sterile bag that is installed at a prescribed position in the cell culture apparatus and in which a cell contained in a cell culture solution is cultured; and a turbidity sensor that includes a light emitter which emits light to the cell culture solution in the sterile bag via a portion of the sterile bag, a light receiver which receives the light transmitted through the cell culture solution via another portion of the sterile bag, and that is configured to place the light emitter, the portion of the sterile bag, another portion of the sterile bag, and the light receiver, optically on a same straight line.

The invention discloses an ion exchange resin column switching system for hydrogen conductivity measurement. The ion exchange resin column switching system comprises a water inlet pipeline, a flow cell, a failure monitoring system, a control system, a first control valve group, a second control valve group, a plurality of cation exchange resin columns and a failure detector for detecting whether each cation exchange resin column fails or not, wherein the water inlet pipeline is communicated with the inlet of each cation exchange resin column through a first control valve group, and the outlet of each cation exchange resin column is communicated with the inlet of the flow cell through a second control valve group; an input end of the failure monitoring system is connected with an output end of each failure detector, an output end of the failure monitoring system is connected with an input end of the control system, and an output end of the control system is connected with a control end of the first control valve group and a control end of the second control valve group. The system can realize automatic switching of the cation exchange resin columns.

The invention discloses a noninvasive triglyceride estimation system based on PPG signals, the system comprising: a data acquisition module for acquiring PPG signals, sample data comprising patient fingertip PPG signals acquired by a professional sensor, and recording triglyceride indexes corresponding to patients; a data preprocessing module used for carrying out single-cycle segmentation on the collected fingertip PPG signals and removing invalid samples measured due to interference of movement, light and the like; a neural network building module used for building a convolutional neural network for training and prediction; and a model training module used for substituting a part of the sample data into the convolutional neural network for training, updating network weight parameters, obtaining a trained neural network model, and taking the other part of reserved samples as a test for prediction analysis. According to the method, the average absolute error of prediction of samples is small, accurate measurement of a triglyceride index can be realized, and the system is noninvasive, convenient, stable and effective.

The invention discloses a continuous metering equipment for granular materials. The continuous metering equipment comprises a frame body and a shell, the shell comprises an upper flange, an outer sleeve and a lower flange, the outer sleeve is arranged between the upper flange and the lower flange, a feeding port is formed in the upper flange, a material blocking plate is arranged on the lower end face of the upper flange, a discharging port is formed in the lower flange, a rotor is arranged in the outer sleeve, the center of the lower flange is provided with a slag discharge port, the center of the upper flange is rotatably connected with a shaft, the shaft is internally rotatably connected with a rotor adjusting screw, the upper end of the rotor adjusting screw is in threaded connection with a nut, the upper end of the shaft is provided with a disc spring seat, a disc spring is arranged between the disc spring seat and the nut, and the outer side of the disc spring seat is provided with a shield; a motor reducer is arranged on the upper end surface of the upper flange; a sensor assembly is arranged on one side of the upper end face of the upper flange, a weighing sensor is arranged on the frame, and the left and right ends of the upper flange are connected with the frame through supporting shaft assemblies. The continuous metering equipment has the advantages that flying dust is avoided during working, and high-temperature materials can be continuously and accurately metered.