659 results about "Volume measurement" patented technology

A fluid volumetric pumping system has a fluid pump and capacitor plates disposed around a pump chamber of the fluid pump. The capacitance between the capacitor plates changes as the volume of fluid in the pump chamber changes. An electrical circuit measures a change in the capacitance between the plates and outputs a signal indicative of the volume of fluid in the pump chamber. The pump having the capacitance sensor of the present invention fluidly connects to a patient. In an embodiment, a peritoneal dialysis system provides dialysate to the patient via the pump, and the capacitance sensor measures the volume of dialysate supplied to and drained from a peritoneal cavity of the patient.

A beer dispensing system which measures beer flow by volume and electronically controls a valve to precisely dispense predetermined volumes of beer. To accurately measure liquid to be dispensed, a cellar valve is used to eliminate beer foam from the beer lines. Beer passes through a flow monitor which electronically relays volumetric information to a control panel. A user inputs a preset volume of beer desired and the control valve opens allowing a flow of beer. When the specific volume of beer has passed through the flow monitor, the control panel causes the control valve to close. This reduces waste and allows a user to attribute revenue to specific employees who electronically input information particular to beer dispensed.

The invention relates to the technical field of computer vision, and discloses a volume measurement method and system based on a depth camera. The method includes the steps: acquiring depth images with objects to be measured from the depth camera; extracting the objects to be measured from the depth images according to depth information to obtain target areas of the objects to be measured; converting two-dimensional image coordinates of pixels in the target areas of the objects to be measured to three-dimensional coordinates under a three-dimensional camera coordinate system by the aid of pre-calibrated parameters of the depth camera; calculating heights and lengths and widths of the objects to be measured according to the three-dimensional coordinates of the objects to be measured under the three-dimensional camera coordinate system, and calculating volumes of the objects to be measured. The depth images comprise depth information of the objects to be measured. The method is high in measuring accuracy and simple and convenient to use and can not be affected by shooting angles and heights, and mounting heights and angles of the camera cannot be calibrated.

A gain controller and method for controlling the value of a gain is used in conjunction with an electrode array for detecting a signal representative of respiratory drive output of a patient during inspiration, and a lung ventilator for assisting inspiration of the patient. The gain controller comprises an input for receiving the signal representative of respiratory drive output; a comparator for determining whether the signal representative of respiratory drive output is higher or lower than a target drive signal; and a gain adjustment unit for increasing the value of a gain when the amplitude of the signal representative of respiratory drive output is higher than the amplitude of the target drive signal and for decreasing the value of this gain when the amplitude of the signal representative of respiratory drive output is lower than the amplitude of the target drive signal. The gain is applied to the signal representative of respiratory drive output to produce an amplified respiratory drive output representative signal used for controlling the lung ventilator. The advantage of target drive ventilation is that this mode of ventilation does not depend on pressure, flow or volume measurements. A leaky ventilatory line will introduce a change in respiratory drive which will change the ventilatory assist in order to return the respiratory drive to its target level. Also, changes in the patient's metabolic or patho-physiological status which result in altered respiratory drive will be compensated.

An infusion pump and method are provided which combine flow rate measurements calibrated by accurate volume measurements over time.

The embodiment of the invention provides a volume measurement method and a device based on three-dimensional laser scanning. The volume measurement method based on three-dimensional laser scanning comprises the following steps: acquiring and obtaining three-dimensional point cloud data of a space body inner wall in a three-dimensional laser scanning manner; modeling a spatial triangular mesh by utilizing the three-dimensional point cloud data of the space body inner wall and obtaining a plurality of slice shapes of a reconstructed space body; and calculating a technological means of the volume of the space body according to the plurality of slice shapes of the reconstructed space body to achieve the following technical effect that a technology based on the three-dimensional laser scanning is provided to quickly and accurately measure the volumes of a railway tank car, a tank type container and other space bodies. The volume measurement method and the device have the beneficial effects that the operation is simple, the safety is high, the labor intensity is low, the railway tank, the tank type container and other geometrical shapes can be adapted, different working environments can be satisfied, the effect of a tank body material and the like is reduced, the data calculation is convenient, the measurement time is short, and the accuracy is high.

A method for determining the volume of an irregularly shaped body part or body such as a fetus using a 3D ultrasonic image composed of light and dark pixels. A caliper is placed on a portion whose volume is to be determined and a computer having the image, automatically counts every pixel with the same echogenicity in every direction as long as it is continuous with the spot the caliper is in, and wherein the computer means stops counting in any direction where the pixels become significantly more echogenic (dark). The volume of the portion, is determined, based on the counted number of pixels and the magnification of the image; and the calculated volume is used to determine physiological characteristics based on known values such as fetal gestation age.

The invention discloses a method for evaluating shale gas adsorption through a coal/shale ultrahigh pressure gas absorption and seepage experiment. The method comprises the steps that a core is selected and put in a sample cylinder, a confining pressure pump is started to make the sample cylinder reach an experimental confining pressure, and vacuumizing is performed; the temperatures of the sample cylinder and a reference cylinder are stabilized at experimental temperature; helium gas is injected into the reference cylinder, and the pressure of the reference cylinder is measured; after the reference cylinder and the sample cylinder are balanced in pressure, the pressure of the sample cylinder is measured; the pressure of the reference cylinder is increased sequentially, and free space volume measurement of the sample cylinder is completed; systematic vacuumizing is performed; water steam is injected into the sample cylinder; methane having set pressure is injected into the reference cylinder, and the pressure of the reference cylinder is acquired; a balancing valve is turned on, and the pressure of the sample cylinder is acquired; the pressure of the reference cylinder is increased sequentially, and the shale gas adsorption experiment is completed under certain water saturation. By adopting the method, the porosity, the permeability, the adsorbing capacity and gas-water seepage of the experimental core, electrical resistivity change of the core in the experimental process and the influence of different water saturations on absorption and desorption amounts can be respectively measured.

The invention provides a rapid volume measurement method based on a spatial invariant feature. The method comprises the steps that feature point extracting and matching and three-dimensional reconstruction are performed on acquired images; the distance proportion of the actual distances among feature points to the real world in a relative coordinate system is added in three-dimensional point cloud to serve as scale information; a Delaunay triangular mesh is built by utilizing a three-dimensional coordinate of the feature points, boundary edge detection elements are added, and an optimal datum plane is fit; the triangular mesh is projected to the datum plane according to the discrete integral thought to determine the volume of an irregular object surrounded by the triangular mesh. The measurement of the actual distances among all the feature points of an object can be completed by utilizing a camera and a ruler, and the trouble of field measurement can be omitted; meanwhile, a data structure used for detecting the boundary edge is added when the Delaunay triangular mesh is built, the peripheral datum plane constituting a boundary curve surface can be effectively obtained, and the method can be further used in volume calculation.

The invention relates to a non-contact measuring method, in particular to visual measuring method of a stockpile in a large-scale stock ground. The method comprises the following steps of: (1) constructing a visual measuring system of stock ground; (2) mounting a binocular vision subsystem; (3) establishing a geometric model of a CCD (Charge Coupled Device) camera; (4) calibrating the parameters of the CCD camera; (5) collecting images; (6) processing the images; (7) searching and matching angular points; (8) confirming the three-dimensional coordinate values of an object point; and (9) interpolating a curve and establishing a height map in a world coordinate system; and (10) measuring the volume. The visual measuring method of the invention automatically eliminates the image distortion caused by a wide-angle lens, can automatically and accurately match the angular points of a left view and a right view, automatically generates the three-dimensional space coordinates of the object point by utilizing an image data conversion relation, optimizes the three-dimensional angular point distribution and constructs the height map of the world coordinate system so that the volume a geometrical irregular stockpile can be simply, intuitively and accurately calculate.

The invention relates to a fixed type automatic volume measurement system and a measuring method of the fixed type automatic volume measurement system. The fixed type automatic volume measurement system is an automated measurement and calculation system based on multi-sensor integration. According to the system, multiple sensors are mainly used for synchronous control of a collector, a control tag reader and a high-speed laser scanner, and are in synchronous communication with an industrial personal computer to achieve data collection. Collected data are processed primarily by a controller to filter invalid data and transmitted to the industrial personal computer rapidly after being marked in a real-time mode with timing marks. A three-dimensional coordinate is computed through calculation processing software running in the industrial personal computer and by aid of the three-dimensional coordinate computational algorithm, vehicle-mounted material stack body modeling is carried out by combining the three-dimensional modeling algorithm, and then the volume of vehicle-mounted materials to be measured is calculated. Therefore, the fixed type automatic volume measurement system and the measuring method of the fixed type automatic volume measurement system have the advantages that a traditional method that a material transport vehicle is guarded all day long and recorded manually is replaced by a method that the material transport vehicle can be identified quickly and automatically, the volume of the vehicle-mounted materials can be measured quickly and accurately, and the material transport vehicle and the materials can be managed effectively.

This invention relates to the field of object volume survey, which discloses a method based on the image volume metering and the measuring technique. This metering equipment comprises the image gathering installment and the computer. The image collecting installment comprises objective table, as well as three cameras established symmetrically on objective table; Take the above metering equipment as the foundation, this measuring technique including the camera demarcation, image gathering, the image pretreatment, the picture edge extraction, the coordinate transformation, the three dimensional restructuring step, finally counts all three dimensional spots on the measured object, then obtain the actual volume of objects. This invention may be widely applied in areas such as medicine, chemical industry, food, environmental protection, water treatment, building materials, grain micro powdery, the granulated material continual quota throws in Canadian, ingredient craft domains dried noodles batch feeding and so on.

This invention relates to coal glue layer total automatic measurement device, which comprises computer, input and output data card, automatic heating temperature control part, smoke volume measurement, probe upper and down drive structures, probe rotation part and pressure automatic measurement, wherein, its uses volume measurement part to judge coal sample volume at peak or trough and to start probe drive structure for coal layer measurement through line step motor impulse sequence to determine coal layer upper and down layer position then uses OLS to match upper and down list layer change curve to get maximum thickness values.

The invention relates to a large-scale piled material volume two-side parallel measuring device and method. In the method, a laser scanner and a laser distance measuring sensor are adopted to cooperate with each other to synchronously collect material pile contour information. The laser scanner is installed on a trolley capable of conducting stable and uniform motion. In the moving process, the laser scanner constantly scans the material pile contour information, the laser distance measuring sensor collects motion displacement of the laser scanner, and two groups of synchronous information forms three-dimensional contour information of a material pile. The trolley moves on a specific track, so that stable motion is achieved. The measuring device is specifically arranged in the mode that two sets of measuring equipment are installed on the two sides of the material pile in parallel respectively so that the material pile contour information can be completely scanned. The collected material pile contour information is transmitted to a PC, the appearance and the volume of the material pile are reconstructed in an integral reconstruction mode, and consequently the volume measurement of large-scale piled materials are achieved. In addition, data obtained through measurement are received by an administrator so that the administrator can make corresponding decisions timely; therefore, the large-scale piled material volume two-side parallel measuring device and method provide a technical support for an enterprise to manage the large-scale piled materials.

Acoustic volume indicators comprise a resonator, a frequency detector, and an indicator. The resonator can be an impactor or a vibration generator. The detector responds to vibration signals provided from the tank wall, which signals will show a significant increase in amplitude at the resonant frequency of the tank and its contents. The detector can be an accelerometer designed to record the received signal. The recorded signal is converted/analyzed by the frequency detector, and is compared to a known preprogrammed specific frequency vs. volume characteristic of the tank. Various audible and/or visual output or indicator devices can be used to indicate whether the liquid volume measurements within or outside of a predetermined volume range based on the known tank characteristics.

Systems and methods for providing a smart hydration container or bottle which accurately tracks a user's liquid intake. The smart hydration container utilizes a new capacitive sensing technology which does not require a complicated design for capacitive conductive surfaces and provides accurate capacitive measurements which map to volume measurements. Through the use of calibrated data, the smart hydration container accurately measures capacitance “as a whole” of the entire container's contents even when the container is not resting upright. In some implementations, the smart hydration container utilizes a combination of capacitive sensing, motion sensing, position sensing, and/or temperature sensing to provide an accurate measure of liquid volume in the container. The capacitive sensor may be electrically shielded by a passive conductive sensor shield, a grounded conductive sensor shield, or an active conductive sensor shield.

The invention discloses a parcel volume measuring method and system, a storage medium and a mobile terminal, and relates to the field of computer vision. Target point cloud is obtained, and the targetpoint cloud at least comprises the point cloud of a support surface and the point cloud of the top surface of a to-be-measured parcel; a plane equation of the support surface and the plane equation of the top surface of the to-be-measured parcel and the point cloud of the top surface of the to-be-measured parcel are obtained in a plane fitting mode, and the height of the to-be-measured parcel iscalculated according to the plane equation of the support surface and the plane equation of the top surface of the to-be-measured parcel; and the point cloud of the top surface of the to-be-measured parcel is projected on a plane corresponding to the plane equation of the to-be-measured parcel top surface to obtain a boundary point cloud; four frame angle points of the top surface frame of the to-be-measured parcel are obtained; according to the coordinates of the four frame angle points, the length and the width of the to-be-measured parcel are obtained through calculation, and the height ofthe to-be-measured parcel is combined, the volume of the to-be-measured parcel is obtained through calculation. The purpose of reducing the measurement error and simplifying the measurement requirement is achieved.

A medical image diagnostic apparatus provided with an image acquisition unit configured to acquire in-vivo information about an object to be examined as a medical image, a display unit configured to display the medical image, a setting unit configured to set a target region of volume measurement in the medial image displayed on the display unit, a calculation unit configured to perform calculation to split the target region into a plurality of volume elements, calculate the moving distance of the vertices of the volume elements when the target region of the acquired medical image moves, calculate the volumes of the volume elements after the movement using the calculated moving distance of the vertices, totalizing the calculated volumes of the volume elements after the movement and using the total volume as the volume of the target region, and a control unit configured to display the volume of the target region on the display unit.

A defogger line forming device is equipped with a nozzle for applying conductive paste to a curved surface resin glass constituting a resin window, a robot arm for moving the nozzle along the window, a contact member provided so as to be movable integrally with the nozzle and adapted to come into contact with the resin window to maintain a fixed distance between the resin window and the nozzle, a volume measurement type supply device for supplying the conductive paste to the nozzle, and a hose communicating with the nozzle and the supply device. More specifically, the nozzle and the contact member are mounted to a bracket at the distal end of the robot arm so as to be slidable in a direction crossing the window, and the supply device is integrally fixed to the bracket.