244results about "Weighing apparatus using electromagnetic balancing" patented technology

This invention relates to a method and apparatus for mass and/or volume measurements of manufactured articles. More particularly, this invention relates to a method and apparatus for mass and/or volume measurements that can be performed on-line in a part manufacturing process. On-line measurement of the mass or volume of material contained in a specific region of interest of the manufactured items is performed 100% on-line. Real-time process control information is based on real-time measurement of the mass or volume of material contained in a specific region of interest of a manufactured item. Automated quality control inspection for manufactured articles is based on real-time measurement of the mass or volume of material contained in a specific region of interest of manufactured items. A manufacturing closed-loop process is directly corrected to keep it within control limits based on real-time measurement of the mass or volume of material contained in a specific region of interest of manufactured items soon after these items are manufactured.

Load cells forming one or more weighing scales are connected to each other and to a common concentrator which communicates to a master controller in the control house via RF wireless communication. The load cells are polled by and provide weight reading to concentrator to the master controller. A digital load cell is used which includes a rocker pin, guided beam, torsion ring or other counterforce, a circuit board mounted on the counterforce and an enclosure sealing the circuit board and all but the load bearing surfaces of the counterforce and a mounded antenna. The circuit board includes a microcomputer and a transceiver. RF communication is provided with the circuit board through a antenna mounted on the enclosure. One or a number of load cells may be connected to a computer or controller to form one or more weighing scales with one or more weighing scales connect to a control house through wireless RF communication. The preferred embodiment uses passive receivers for receiving the signals and waveguide to minimize power requirements.

An on-board device (5) for measuring the weight of an aircraft (G), the device comprising a hollow element (3) extending from a first end (11) to a second end (12) and a bar (4) extending inside said hollow element (3) from an embedded end (13) to a free end (14). The free end (14) has first and second sensors (21, 22) respectively for taking first and second distance measurements, said device (5) further including processor means (50) connected to the first sensor (21) and to the second sensor (22) to generate an alert when a sum of the first measurement plus the second measurement varies, and secondly a processor unit (60) connected to at least one of said sensors (21, 22) for determining information relating to weight.

A scale can include a low capacity sensing mechanism operatively coupled to a load, wherein the low capacity sensing mechanism may detect movement of the load. A transfer mechanism can be operatively coupled to the low capacity sensing mechanism, wherein the low capacity sensing mechanism may enable the scale to weigh both relatively heavy loads and relatively light loads to a minor division resolution associated with the low capacity sensing mechanism.

A weighing sensor including a base (1) fixed to a housing, a load sensor (2) connected to the base in a displaceable manner via two arms (3, 4), a lever system (8 . . . 11) having at least one lever and transmitting the load acting on the load sensor to a transducer (12, 13), and a built-in calibration weight (40) which may be lowered onto a support region (30/38) for checking and/or calibrating the sensitivity of the weighing sensor. The support region is guided in a parallel manner by two additional arms (21, 22) and is connected to a lever (9/39) of the lever system (8 . . . 11) via a coupling element (26). Relatively large loads on the weighing sensor may be simulated with relatively small calibration weights, without the need for complicated lifting devices. The two additional arms (21, 22) are connected on the one hand to the support region (30/38) and on the other hand to the load sensor (2) and are located on the side of the load sensor (2) opposite from the lever system (8 . . . 11).

Load cells 35, 56 on antirotation dowel pins 28a or load mounts 49 indicate brake reaction forces in the disk brake 8, 8a of an elevator. Vertical load cells 72, 73 on bending load cell 80 indicate vertical brake reaction loads on a rail 60. A table indicating the load of an empty car at each of the landings served by the car permits subtracting load components relating to ropes, chains and cables to provide a live load indication prior to brake release; this may be used to determine if the load exceeds the maximum permissible load for the car.

An online load detection device for a self-balancing two-wheel vehicle, comprising a support platform load detection device: the support platform load detection device comprises at least a group of magnetic detection devices; each group of magnetic detection devices comprise a permanent magnet and a magnetic sensor; the permanent magnet is supported on a support platform via an elastic member; the magnetic sensor is disposed in the easing of the support platform, and is used to detect the magnetic field change caused by the relative displacement between the permanent magnet and the magnetic sensor and output a detection signal. The detection device further comprises a seat pressure sensor disposed on a seat. The detection device detects the load pressure of the support platform in a non-contact manner, and can avoid wear, judge and warn the driving attitude of a driver.

A scale may include a conveyor belt that carries a load, where the load has a weight. A generator is included that receives mechanical energy arising from movement of the conveyor belt and outputs electrical energy that corresponds to a rate of movement of the conveyor belt. At least one load cell receives the electrical energy from the generator, senses the weight of the load, and outputs a voltage that corresponds to the weight of the load and the rate of movement of the conveyor belt.

An electronic balance includes a load transmission mechanism for receiving an object to be measured, a magnetic field generator having a force coil for generating magnetic field, and a balance beam connected at one end to the load transmission mechanism and disposed adjacent to the magnetic field generator with a fulcrum interposed between a portion connected to the weight section and the magnetic field generator. An electromagnetic force generated by supplying current to the force coil is applied to the balance beam to obtain a weight of the object from the current flowing through the force coil in equilibrium with the load. A damper is attached to the balance beam to control vibration in at least one of a longitudinal direction of the balance beam and a horizontal direction perpendicularly intersecting therewith.

The invention discloses a multifunctional high-accuracy electronic balance. The internal structure of the electronic balance comprises an electromagnetic force balance sensor, a photoelectric detection circuit, a proportion integration differentiation (PID) regulation circuit, a signal modulation circuit, a data collection circuit, a microprocessor master control module and a temperature detection module. The electromagnetic force balance sensor, the photoelectric detection circuit and the PID regulation circuit form a closed system to improve accuracy and stability of the electronic balance. The multifunctional high-accuracy electronic balance is novel in design and convenient to operate. Due to adopting the electromagnetic force balance sensor and utilizing the null method principle to weigh quality of weighed object, the multifunctional high-accuracy electronic balance has excellent performance of being high in measurement accuracy, good in measurement stability and capable of performing continuous and repeated measurement. Besides, the multifunctional high-accuracy electronic balance further has functions of being various in measurement type, and capable of achieving full-automatic calibration and self-diagnosis of breakdown.

This invention discloses a kind of material weight metering method under special environment, it forms a metering system with a kind of magnetic suspension metering device, intelligent control device and computer system for dividing the sample circumstance and the measuring circumstance; with the adjusting and controlling of the position sensor and intelligent control device, realizing magnetic suspension situation; after realizing zero adjusting under the normal environment, setting the needed temperature and pressure, the intelligent control device intelligently adjusts and controls the temperature adjusting device and the pressure adjusting device according to the adjusting temperature and adjusting pressure command the computer system exports, to realize the zero adjusting under the set environment; after the environment in the adjusting environment pipe getting the set temperature and pressure, the material weight in the environment pipe is delivered to the measuring device of the out pipe non-touched by the magnetic force coupling function that are produced by the permanent-magnet in the environment and the electromagnet out of the environment, and the measuring device of the out pipe put the measuring signal into the computer system.

A weighing cell based on the principle of electromagnetic force compensation. A permanent magnet system is mounted on a base part and includes an air gap within which is suspended a coil that is connected to a load receiver through a force-transmitting mechanism. The coil carries an electrical compensation current when the weighing cell is in operation. An optoelectronic position sensor is also included, and its signal corresponds to the deflection of the coil from a zero position which occurs as a result of placing a load on the load receiver. A closed-loop controller regulates the compensation current in response to the sensor signal in such a way that the coil and the load receiver that is connected to it are returned to their zero position by the electromagnetic force that is acting between the coil and the permanent magnet.

A force measuring device for seat weight determination in a motor vehicle includes a taking up element which has at least two bearing points. The device further includes a mechanism forming a first recess in the taking up element in a region between at least two bearing points and a rod-shaped element which extends in the longitudinal axis of the taking up element and is not loaded by bending forces. The rod-shaped element has a free end which deviates from the longitudinal axis of the taking up element when a force to be measured acts on the taking up element, and a measuring unit with a magnet and a magnetic field-sensitive sensor The magnet and the magnetic field-sensitive sensor are arranged immovably relative to one another so that the distance from the magnet to a ferromagnetic material changes under loading with the force.

The invention discloses a high-performance electromagnetic scale which comprises a weighing disk, a balance mechanism and a counterbalance part, wherein the balance mechanism comprises a pivot point, a cross beam, a pointer, a scale, a projection screen, a light source and a center pillar; the counterbalance part comprises two magnetic poles, a slideable conductive rod, a coil, a detection and amplification circuit, a current control part and a power supply. The high-performance electromagnetic scale is controlled by a singlechip, can realize automatic measurement, automatic scale balance regulation and automatic measuring parameter acquisition and processing, has the characteristics of small measuring error, high speed and high precision, and brings great convenience to measure.