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An analytical balance, electro-optical technology, applied in measuring devices, instruments, weighing and other directions, can solve the problems of long time and troublesome operation, achieve the effect of convenient operation and prevent damage to the balance
Active Publication Date: 2011-12-21
NANTONG HUALONG MICROELECTRONICS
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Such a process is not only cumbersome to operate and takes a long time, but also the object to be weighed must be protected during the transfer to avoid contamination
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[0013] The present invention will be described in further detail below in conjunction with accompanying drawing description and specific embodiment:
[0014] Such as figure 1 Shown is the structure of the first embodiment of the present invention, below the weighing pan 1 of the electro-optic analytical balance is provided with a load cell 2, below the load cell 2 is a tray holder 21, and the load cell 2 is connected to the projection screen 6 through a wire 3 The PCB board 4 in the base has an amplifying circuit, an analog-to-digital converter, and a display 5 on the PCB board 4, and the tray support is connected with the lifting pivot, and moves up and down under the control of the lifting pivot.
[0015] Such as figure 2 Shown is the signal flow diagram of the first embodiment of the present invention, the load cell 2 is used to convert the pressure into a voltage signal, and the output end is connected to the amplifying circuit; the amplifying circuit is used to amplify ...
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Abstract
The invention discloses an electro-optical analytical balance with a coarse weighing device, which comprises a lifting pivot, a weighing sensor, an amplifying circuit, an analog-to-digital converter and a display, wherein the weighing sensor is arranged below an object weighing tray and is used for converting pressure into a voltage signal; the amplifying circuit is used for amplifying the voltage signal; the analog-to-digital converter is used for converting a voltage analog signal into a digital signal; the display is used for displaying the digital signal; an output end of the weighing sensor is connected with the amplifying circuit; an output end of the amplifying circuit is connected with the analog-to-digital converter; an output end of the analog-to-digital converter is connected with the display; and the weighing sensor is connected with the lifting pivot. When the electro-optical analytical balance is in use, the coarse weighing of a weighed object is completed in the analytical balance; the process of transferring the weighed object is saved; the operation is convenient; and the weighed object is prevented from being polluted to influence weighing precision.
Description
technical field [0001] The invention relates to an electro-optical analytical balance, in particular to an electro-optical analytical balance with a rough weighing device. Background technique [0002] At present, semi-mechanical and full-mechanical electro-optic analytical balances are still widely used in the field of chemical analysis, generally including balance beams, pillars, lifting lugs, fulcrum knife edges, ring codes, ring code index plates, stipples, dampers, balances Pan, pan support, pointer, projection screen, balance cover, lifting pivot, micro-adjustment lever, balance foot, balance adjustment screw, but this kind of balance is more troublesome in weighing operation, mainly because it is to prevent the object being weighed If the mass exceeds the range of the analytical balance and roughly estimates the mass of the object to be weighed, first weigh it in an ordinary balance with low precision, estimate the rough value of the object to be weighed, and then tra...
Claims
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Application Information
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