CN203464986U

CN203464986U - Electromagnetic-force-balanced microbalance

Info

Publication number: CN203464986U
Application number: CN201320632538.5U
Authority: CN
Inventors: 应亚宸
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-07
Filing date: 2013-10-07
Publication date: 2014-03-05
Anticipated expiration: 2023-10-07

Abstract

Disclosed is an electromagnetic-force-balanced microbalance. The microbalance includes a meter core of a pointer-type meter head, a tray, a power supply and an ammeter used for displaying numerical values. The microbalance is characterized in that the meter core is installed on a vertical panel; a pointer is in a horizontal state; an initial graduation line which coincides with the pointer is marked on the panel; the other end of the pointer is provided with a knife edge. The tray is suspended on the knife edge; the microbalance is arranged in a wind shelter and the meter core is lead out through a wire; and in aspect of circuit connection, the meter core and the ammeter are connected to positive and negative output ends of an adjustable voltage-stabilizing power supply after being connected serially. The pointer-type meter head makes use of a force applied to a coil in a magnetic field to drive the pointer to deflect. A to-be-measured object is placed on the tray at the other end of the pointer of the microbalance and the gravity of the object is balanced by the electromagnetic force so that the mass of the object can be measured as long as the size of the current of the coil of the meter core is measured. Because measurement of small current is comparatively easy, precise measurement can be realized by the microbalance.

Description

A kind of microbalance of electromagnetic force equilibrium

Technical field

The utility model relates to gauging instrument, particularly the improvement to balance.

Background technology

Balance is divided into mechanical type and electronic analytical balance, and mechanical balance is cheap, but resolving power is low, cannot be for precision weighing.Electronic analytical balance adopts strain transducer, utilizes semi-conductive piezoresistive effect, reaches the object of weighed object weight.Electronic balance resolving power is high, but expensive.

A lot of analysis tested and need to be weighed micro-article, and the maximal value of weighing is generally no more than 10g, but resolving power requirement is very high, reach 0.01mg rank.The electronic balance that the microbalance cost ratio of applicable this weighing is general is more expensive.

Utility model content

The utility model object is to provide a kind of high resolution, microbalance cheaply.

Scheme of the present utility model is: a kind of microbalance of electromagnetic force equilibrium, the watch core, pallet, the power supply that comprise pointer header, and for showing the reometer of numerical value, it is characterized in that: watch core is arranged on a vertical panel, and pointer is the level of state, on panel, be marked with an initial scale mark with hands coincide, the other end at pointer is shaped with an edge of a knife, on the edge of a knife, hang pallet, said apparatus is installed in a hurricane globe, and watch core is drawn with electric wire; At circuit side connector face, after watch core and reometer series connection, be connected on the positive-negative output end of an adjustable stabilized voltage supply.

The utility model has the advantages that: pointer header is to utilize stressed in magnetic field of coil, drive needle deflection, this device is placed article to be weighed on the pallet of the pointer other end, by electromagnetic force, carried out the gravity of balance object, as long as measure by the size of current of watch core coil, can measure the quality of object, because tiny current measurement ratio is easier to, thereby this device can be realized accurate weighing.

Accompanying drawing explanation

The utility model is described in further detail in conjunction with the embodiments with reference to the accompanying drawings below.

Fig. 1 is that the utility model is faced structural representation.

Fig. 2 is right TV structure schematic diagram.

Fig. 3 is electric theory diagram.

Mark in figure: 1 panel, 2 initial scale marks, 3 pointers, 4 watch cores, 5 edges of a knife, 6 pallets, 7 bases, 8 adjustable stabilized voltage supplies, 9 reometers.

Embodiment

Shown in Fig. 1 and Fig. 2, the watch core that the watch core 4 of embodiment is pointer header, watch core 4 is arranged on a vertical panel 1, pointer 3 is the level of state, on panel 1, be marked with an initial scale mark 2 overlapping with pointer 3, in figure, in order to distinguish pointer 3 and initial scale mark 2, drawn separately.

The other end at pointer 3 is shaped with an edge of a knife 5, hangs pallet 6 on the edge of a knife 5, and said apparatus is installed in a hurricane globe, and clear for drawing do not draw hurricane globe in accompanying drawing, identical with on general balance of hurricane globe.

In the outside of said structure, there is a cabinet, circuit part is arranged in cabinet, mainly by adjustable stabilized voltage supply 8, reometer 9, formed, annexation is as shown in Figure 3: the coil of watch core 4 is drawn out in this cabinet with electric wire, after connecting with reometer 9, be connected on the positive-negative output end of adjustable stabilized voltage supply 8.

In conjunction with each figure, during use, on pallet 6, place article to be weighed, due to Action of Gravity Field, pointer 3, toward upper deflecting, leaves initial scale mark 2.

Now, regulate adjustable stabilized voltage supply 8, regulate by the size of current of watch core 4, due to the effect of electromagnetic force, down deflection of pointer 3, waits pointer 3 to get back to origin-location, while overlapping with initial scale mark 2, the electromagnetic force on watch core 4 just in time balance the gravity of article.

The size of electromagnetic force is directly proportional to the electric current of the watch core 4 of flowing through, and the reading of reometer 9 can reflect the quality reading of article.

The demonstration reading of reometer 9, through demarcating, can directly show the quality reading of article.

The utility model adopts digital ammeter, can show the electric current of microampere order, and resolving power is high, thereby this balance can weigh small article, through test determination, can reach 0.01mg level.

Claims

1. the microbalance of an electromagnetic force equilibrium, the watch core, pallet, the power supply that comprise pointer header, and for showing the reometer of numerical value, it is characterized in that: watch core (4) is arranged on a vertical panel (1), pointer (3) is the level of state, on panel (1), be marked with an initial scale mark (2) overlapping with pointer (3), the other end at pointer (3) is shaped with an edge of a knife (5), the upper pallet (6) that hangs of the edge of a knife (5), said apparatus is installed in a hurricane globe, and watch core (4) is drawn with electric wire; At circuit side connector face, after watch core (4) and reometer (9) series connection, be connected on the positive-negative output end of an adjustable stabilized voltage supply (8).