124results about "Weighing apparatus using electromagnetic balancing" patented technology

A force sensor has a sensing system including a target piece and a sensing element, configured to provide changes of a magnetic field, being generated by motion of the target piece. The sensing element senses these changes and provides a signal representative of the position of the target piece. An integrated circuit with processing means can process signals from the sensing element. A semiconductor package includes at least the integrated circuit. A flexible piece includes the target, and it is attached to the semiconductor package. The attachment area between the flexible piece and the semiconductor package does not extend beyond the top projection, or outline, of the semiconductor package. The flexible piece receives a force stimulus, so that upon exerting a force on the flexible piece, the displacement of the target piece with respect to the surface of the semiconductor package can be sensed by the sensing element.

The invention relates to the technical field of adsorption instruments, particularly provides a gravimetric adsorption instrument based on a magnetic suspension balance and a control method of the gravimetric adsorption instrument, and aims to solve the problem that a microbalance of an existing gravimetric adsorption instrument has many restrictions on the application range of the adsorption instrument. The gravimetric method adsorption instrument comprises a magnetic suspension system and a sample chamber, the magnetic suspension system comprises a first part and a second part which are arranged outside and inside the sample chamber, the first part comprises a microbalance and a first magnetic device, and the first magnetic device is an electromagnetic device and is connected with the microbalance of the magnetic suspension system; the second part comprises a second magnetic device, the second magnetic device is a permanent magnet and is connected with a sample in the sample chamber, and magnetic force generated after the first magnetic device is electrified can attract the second magnetic device and the sample and weigh the second magnetic device and the sample through the microbalance. The first part of the magnetic suspension system is arranged outside the sample chamber, so that the first part is prevented from being in contact with the atmosphere in the sample chamber, and the existing problems are solved.

The utility model belongs to the technical field of electronic balances, and particularly relates to an improved structure of an electromagnetic force balancing device for an electronic balance, which comprises a stand column assembly vertically arranged in the electromagnetic force balancing device, the stand column assembly comprises an outer column body and an inner column body fixedly arranged in the outer column body, and a damping ring is sleeved outside the outer column body. A plurality of stress buffering grooves are vertically formed in the surface of the outer column body. According to the utility model, the durability of the permanent magnet is improved, the possibility of demagnetization of the permanent magnet is greatly reduced, the influence of uncertainty in the measurement process of the electronic balance is further reduced, and the accuracy and reliability of the measurement result are ensured.

The invention relates to a weighing system (10) comprising - a base (12), - a load receiver (14) articulated to the base (12) by means of a parallel link arrangement, - a transmission lever (24) pivotally connected to the base (12) by means of a transmission lever joint (25), the first transmission lever arm (241) of which is connected to the load receiver (14) via a load coupling band (28) and the second transmission lever arm (242) of which carries at least one element of an electromagnetically compensatory sensor arrangement (26), and - an astasis force generating element fixed on one side of the base (12), by means of which an astasis force can be generated which can be introduced into an introduction point (32) of the transmission lever (24), The invention is characterized by an astasis lever (36) pivotally connected to the base (12) by means of an astasis lever joint (40), the first astasis lever arm (361) of which is connected to the introduction point (32) via an astasis coupling band (34) and the second astasis lever arm (362) of which is operatively connected to the astasis force generating element.

The invention relates to the technical field of magnetic suspension measurement, in particular to a magnetic suspension balance and a control method thereof, and aims to solve the problems that a coil and a stator permanent magnet of an existing magnetic suspension balance are complex in assembly structure and difficult to disassemble and assemble, and the diameter of a reaction chamber of the magnetic suspension balance is large and the high-voltage-resistant level of the magnetic suspension balance is reduced due to the fact that the occupied space is large. The magnetic suspension balance comprises a sample chamber and a magnetic suspension weighing module, the magnetic suspension weighing module comprises an analytical balance, a first magnetic device, a second magnetic device and a weighing part, the first magnetic device is connected with the analytical balance, the second magnetic device is connected with the weighing part, and the weighing part is connected with a sample; the stabilizing module comprises a third magnetic device arranged outside the sample chamber and a fourth magnetic device arranged inside the sample chamber, and the fourth magnetic device is connected with the second magnetic device and can drive the second magnetic device to eliminate displacement, stop rotating and keep stable under the magnetic action of the third magnetic device.

A system includes a platen assembly having a platen and a magnet coupled with an underside of the platen. The system also includes a base assembly having a storage component and a base magnet coupled with the storage component. The base magnet and the magnet of the platen are magnetically coupled to secure the platen in place relative to the base assembly. The system also includes an electromagnet that is selectively activated to increase a holding strength of the platen to the base assembly. Techniques for selectively activating an electromagnet to increase a holding strength of a platen to a base assembly are also provided.

The invention relates to a weighing system (10) comprising - a base (12), - a load sensor (14) which is articulated to the base (12) by means of a parallel link arrangement, - a translation lever (24) pivotably attached to the base (12) by means of a translation lever joint (25), the first translation lever arm (241) of which is connected to the load sensor (14) via a load coupling band (28) and the second translation lever arm (242) of which carries an element of an electromagnetic compensatory sensor arrangement (26), - an astaxation force generating element (42) fixed on one side at the base (12), by means of which an astaxation force can be generated which can be introduced into an introduction point (32) on the force flow path, and - an astaxation lever (36) pivotably attached to the base (12) by means of an astaxation lever joint (40), which is connected to the introduction point (32) at a first coupling point by means of an astaxation coupling band (34) and which is operatively connected to the astaxation force generating element (42) at a second coupling point. The invention is characterized in that the introduction point (32) is rigidly connected to the load receiver (14) and the astaxation coupling band (34) is extended longitudinally in the longitudinal direction (L) of the weighing system (10) and has a different length than each of the parallel links (16a, 16b).

The apparatus may include a memory storing instructions and a processor configured to execute the instructions to determine an initial mass of the sample, distill the sample to at least a thermal destruction temperature, record vapor temperature values, liquid temperature values, and vapor pressure values ​​associated with the sample at a set of time points during the distillation, and determine a residual mass of the sample. The processor may be further configured to generate a pressure curve based on the vapor pressure values, calculate a summary integral surface of the generated pressure curve, and generate a distillation curve relating the vapor temperature values ​​and liquid temperature values ​​to a mass percentage of the sample evaporated based on the calculated summary integral surface, the initial mass of the sample, and the residual mass of the sample.

Device and method for detecting an overload on a scale which operates according to the principle of electromagnetic force compensation with a carrying coil and a magnet, wherein, in addition to the measuring voltage drop across a measuring resistor, a different auxiliary voltage is detected and evaluated, which includes at least the total voltage drop across the carrying coil and the measuring resistor.

The invention relates to the technical field of electromagnetic measurement, in particular to a method for increasing a constant-speed section in motion of a power balance coil by introducing nonlinear vibration, and the method comprises the steps: introducing an odd harmonic current component meeting a first target condition into a drive coil of a target power balance, and carrying out the initial compensation of the coil, generating an initial coil speed curve, meeting a preset flat condition, of the coil according to the initial compensation result, and introducing a second harmonic current component meeting a second target condition into the driving coil based on the initial coil speed curve to carry out at least one secondary compensation, and generating at least one coil speed curve of the coil according to the at least one secondary compensation result, and determining that the coil moves in the target constant-speed section when the fluctuation quantity and the gradient of the at least one coil speed curve meet preset standards. Therefore, the problems that in the prior art, a coil movement speed curve is prone to fluctuating and inclining, and the accuracy and repeatability of a power balance measurement result are reduced are solved.

The invention provides a hemispherical vortex type blood sampling scale which comprises a box body, a swinging mechanism and a platform mechanism. The swinging mechanism is arranged in the box body, and the platform mechanism is magnetically connected with the top end of the swinging mechanism. The platform mechanism comprises two arc-shaped sliding ways, an iron block core, a rubber connecting sleeve and a plurality of movable assemblies. The iron block core is sleeved with the rubber connecting sleeve, and the two arc-shaped sliding ways are symmetrically arranged on the outer side of the rubber connecting sleeve. The multiple movable assemblies are arranged on the arc-shaped sliding way. According to the hemispherical vortex type blood sampling scale, the box body, the swinging mechanism and the platform mechanism are matched with one another. According to the blood bag fixing device, the containing disc for containing the blood bag is deformed, and then test tubes can be placed and fixed in a matched mode. The centrifugal blood sampling device has a centrifugal machine function and a blood sampling anti-coagulation function. And meanwhile, the bearing tray can be cleaned in the device after being used, and personnel do not need to disassemble and carry the bearing tray.

A device may include a memory storing instructions and a processor configured to execute the instructions to determine an initial mass of a sample; distill the sample up to at least a thermal destruction temperature; record, at a set of time points during the distilling, vapor temperature values, liquid temperature values, and vapor pressure values associated with the sample; and determine a residual mass of the sample. The processor may be further configured to generate a pressure curve based on the vapor pressure values; calculate a summary integral surface for the generated pressure curve; and generate a distillation curve that relates the vapor temperature values and the liquid temperature values to mass percentage of the sample that has evaporated, based on the calculated summary integral surface, the initial mass of the sample, and the residual mass of the sample.

A force sensor comprises a sensing system including a magnet and a sensing element, configured to provide changes of a magnetic field, being generated by motion of the magnet. The sensing element senses these changes and provides a signal representative of the position of the magnet. An integrated circuit with processing means can process signals from the sensing element. A semiconductor package includes at least the integrated circuit. A flexible piece comprises the target, and it is attached to the semiconductor package, where the attachment area between the flexible piece and the semiconductor package does not extend beyond the top projection, or outline, of the semiconductor package. The flexible piece receives a force stimulus, so that upon exerting a force on the flexible piece, the displacement of the magnet with respect to the surface of the semiconductor package can be sensed by the sensing element.

The invention relates to a weighing system (10), comprising - a base (12), - a load cell (14) coupled to the base (12) by means of a parallel link arrangement, - a transmission lever (24) which is pivotably coupled to the base (12) by means of a transmission lever joint (25), the first transmission lever arm (241) of which transmission lever is connected to the load cell (14) via a load coupling strap (28) and the second transmission lever arm (242) of which transmission lever bears at least one element of an electromagnetically compensatory sensor arrangement (26), and - an astatic force generating element which is fixed on one side to the base (12) and by means of which an astatic force which can be introduced into an introductory point (32) of the transmission lever (24) can be generated. The invention is distinguished by an astatic lever (36) which is pivotably coupled to the base (12) by means of an astatic lever joint (40) and the first astatic lever arm (361) of which astatic lever is connected to the introductory point (32) via an astatic coupling strap (34) and the second astatic lever arm (362) of which astatic lever is operatively connected to the astatic force generating element.

Weighing system (10) comprising a base (14), a load sensor (18) coupled vertically to the base (14) by means of a parallel link arrangement and a lever (24) pivotally articulated to the base (14) by means of a lever joint (22) with a first lever arm (241) arranged on one side of the lever joint (22) and a second lever arm (242) arranged on the other side of the lever joint (22) and provided for receiving a sensor arrangement, wherein the first lever arm (241) is coupled to the load-bearing device (18) in a vertically force-transmitting manner by means of a coupling band (30) fixed to both it and the load-bearing device (18), wherein the coupling band (30) has two functional areas which are distinguished from immediately adjacent areas by reduced width and reduced thickness, namely - a thin-point joint (32) which has a thickness that initially decreases in the longitudinal direction of the coupling band (30) and then increases again after reaching a localized minimum thickness, in order to define a localized, first pivot axis (321) which extends parallel to the width direction and perpendicular to the length direction of the coupling band (30), - a resilience region (34, 34') which, in the longitudinal direction of the coupling band (30), has a thickness that initially decreases, remains constant after reaching a minimum thickness over a distance at least corresponding to its width, and then increases again, in order to define a continuous set of second pivot axes (341) parallel to the first pivot axis (321), and wherein, further in the longitudinal direction between the thin-point joint (32) and the resilience region (34, 34'), a lateral pivot area (39) is arranged, which consists of one or more parallel webs (392) extending in the longitudinal direction of the coupling band (30), each having a web width that is less than the thickness of the coupling band (30) in this area.

To provide a force measuring device of sufficient accuracy combined with an appropriate and simple configuration.SOLUTION: A force-measuring device based on the principles of electromagnetic force compensation, comprising an electronic circuit driven by a direct current, the electronic circuit comprising an inductor, in particular a coil, a control unit for controlling a compensation force by controlling a current through the inductor as a function of a force to be measured, and means for providing a measurement output indicative of the force to be measured, wherein the control of the current comprises a dynamic switching of two switch states associated with two conducting directions of the inductor (1L, 2L).SELECTED DRAWING: Figure 2

A dual-truncated wheel Kibble balance includes: a stationary frame; a double balance wheel disposed on the stationary frame; a pair of guide members, such that one of the guide members is disposed on each opposing end of the double balance wheel; outer connector bands, such that each guide member is gravitationally suspended from the double balance wheel by at least one of the outer connector bands; inner connector bands, such that each guide member is gravitationally suspended from the double balance wheel by at least one of the inner connector bands; and a central flexural bridge in mechanical communication with the stationary frame and the double balance wheel, such that the central flexural bridge is: interposed between the stationary frame and double balance wheel, interconnects the stationary frame and the double balance wheel, and flexes in response to pivotal motion of the double balance wheel relative to the stationary frame.

The invention relates to a system (10) for weighing a predetermined mass of a food product, comprising an electric stepping motor (30) supported by a chassis (11) and having an output shaft, a food-product receiving member (22) which is able to move along the axis of travel between a position for receiving and a position for tipping out the food product, and an electronic control unit for controlling the electric motor. According to the invention, the receiving member is unable to move independently of the output shaft and the weighing system is configured so that, in the receiving position, the receiving member and food product apply a static torque to the output shaft, and that the electronic control unit is configured to apply a resistive torque, for a predetermined mass of the food product, to the output shaft so that when the static torque is at least equal to the resistive torque, the output shaft changes position.

An electronic balance includes an electromagnetic unit including a yoke with a magnet disposed inside, and configured to achieve a balance with a load of a to-be-weighed object by supplying a current to a coil disposed in a magnetic field of the magnet, and a temperature sensor configured to detect a temperature of the electromagnetic unit, wherein the temperature sensor is attached to a flexible board including a sensor attaching portion to which the temperature sensor is attached and a lead wire portion configured to connect the temperature sensor to an A / D converter, a sensor accommodating recess capable of accommodating the temperature sensor is formed on a surface of the yoke, and the temperature sensor is attached to the electromagnetic unit so that the temperature sensor is accommodated in the sensor accommodating recess, and the sensor attaching portion closes the sensor accommodating recess.

To provide a weighing sensor that requires only a small structural space and is manufactured at low cost, and a scale equipped with the weighing sensor.SOLUTION: A monolithic weighing sensor 12 for a scale 10 comprises a ground body 22, and a load introduction unit 24 which monolithically merges into the ground body 22 via a first parallelogram guide 26. The load introduction unit 24 has a load receiving block 36 and a load transmission unit 38. The load receiving block 36 merges monolithically into the load transmission unit 38 by means of a second parallelogram guide 40, and the first parallelogram guide 26 is further hinged on the load transmission unit 38. The load receiving block 36 has a push rod receiving unit for an overload protection unit 16.SELECTED DRAWING: Figure 1

The invention relates to a device for measuring the mass and / or mass change of an object, comprising: a weighing sensor; and a magnetic field sensor.

The mass detection device includes a processor; at least one sensor assembly at least including a first sensor and a second sensor; the sensor assembly is configured to be connected to the processor and output a first sensing information and a second sensing information related to a mass of an object to be measured; wherein the processor is configured to acquire the first sensing information and the second sensing information to determine an initially measured mass of the object to be measured by each sensor, and according to a comparison between a selected initially measured mass of the object to be measured and a first set threshold and a comparison between an absolute value of a difference in the initially measured mass of the object to be measured by each sensor and a second set threshold, to determine a final mass of the object to be measured.

The invention relates to an inductive sensor (D1) comprising a fixed part (1) and a moving part (2). The moving part comprises a movable or deformable sensing element (SE) and a magnetic coupling element (Fe) mechanically fixed to the sensing element (SE). The fixed part comprises a voltage generator (G1) and a coil transformer (12) comprising a transmitting inductor (L1) connected in parallel with the generator and a receiving inductor (L2). The magnetic coupling element (Fe) is separated from one end of the transmitting inductor (L1) by a separation distance (d). The fixed part includes a data acquisition chain (11) connected to the receiving inductor (L2) and configured to generate a measurement signal (Vout) of the variation in the distance (d). The measurement signal (Vout) corresponds to a measurement of the variation in frequency or amplitude of the voltage across the receiving inductor (L2). Figure for the abridged version: Fig.1a.

The utility model belongs to fire fighting equipment storage equipment technical field especially is a kind of fire rescue breathing apparatus gas cylinder storage device, including vertical support, control panel, hepa air exchange tank, control panel is set in vertical support side end, hepa air exchange tank is set in the other side of vertical support. The utility model is stored by setting gas cylinder storage bin, gyro wheel guide rail, positioning magnetic attraction piece, sliding storage frame, self-adapting limiting frame, piezoelectric weighing sensor and humidity sensor, when gas cylinder needs to be stored, operator inserts gas cylinder into gas cylinder storage bin inside, gas cylinder inserts inside sliding storage frame, and according to the size of gas cylinder extrudes the self-adapting limiting frame of both sides, and self-adapting limiting frame is opened by the connection of spring column, and is close to gas cylinder outside. Piezoelectric weighing sensor, humidity sensor, voc sensor monitor the weight, storage environment humidity and volatile organic compound concentration of gas cylinder respectively, and are uploaded to control panel in real time.

A weighing sensor (10) used in an electronic balance comprises a weighing unit (11), which comprising a load-receiving portion (111), a fixing portion (112) and parallel guiding members (113) for connecting the load-receiving portion (111) and the fixing portion (112) together; a lever (12), wherein one end of the lever (12) is connected to the load-receiving portion (112), and the lever (12) is disposed between the parallel guiding members (113) and the fixing portion (112); and a photoelectric position limiting block (14), wherein a lower portion of the photoelectric position limiting block (14) is connected to the fixing portion (112), an upper portion of the photoelectric position limiting block (14) is provided with a limiting structure (141), and a tail end portion of the other end of the lever (12) is disposed in the limiting structure (141) to limit a deviation of the tail end portion of the other end of the lever (12). A photoelectric position sensor and a stop structure for preventing the tail portion of the lever (12) from being deviated to a relatively deviation are both provided on the photoelectric position limiting block (14) to form an integral structure, and such a weighing sensor has the advantages of a simple structure, convenient to assemble, low cost, etc. An electronic balance comprising the weighing sensor (10) is also provided.