A kind of portable electronic balanceTechnical field
The present invention relates to balance equipment field, particularly relate to a kind of portable electronic balance.
Background technology
Along with the development of measurement technology and electronic technology, the meausring apparatus such as steelyard, platform balance, platform scale of traditional pure physical construction is progressively eliminated, electronic weighting equipment with it accurately, fast, the plurality of advantages such as convenience, intuitive display and be subject to the favor of people.
Electronic weighting equipment is probably divided into electronic balance, electronic weighing scale, electronic weighing counting balance, heavy electronic to hang pound, electronic loadometer, axle load meter, several large class of specialty scale, and electronic balance comprises ordinary electronic balance, precision electronic balance and special balance, the code that wherein special balance has textile printing industry special walks scale, the jewelry scale of high precision, high stability.Electronic scale weighing principle is generally to be weighed thing by weight transfer to LOAD CELLS, then weight is shown by charactron or liquid crystal display after a series of process.So determine the mainly LOAD CELLS of its fundamental type.
At present, the use of electronic table scale in commercial distribution is quite general, but there is larger limitation: volume is large, and cost is high, needs power frequency AC to power, and can not carry with, and retailer's change not easily finds, application prospect is restricted.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of portable electronic balance, and volume is little, accurate measurement, fast, integrates quality weighing function and calculation of price function, and can be connected with external printer, provide printing function.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of portable electronic balance, comprise cabinet and the stainless steel scale pan being embedded in described cabinet opening surface, described portable electronic balance connects external printer by usb interface module, described portable electronic balance comprises hardware system, its hardware system is by Master control chip, and the LOAD CELLS to be electrically connected with described Master control chip, amplifying circuit, A/D converter, LCDs and usb interface module composition, described LOAD CELLS adopts electromagnetic force balance sensor.
In a preferred embodiment of the present invention, described LCDs adopts LED backlit display.
In a preferred embodiment of the present invention, described A/D converter adopts integral a/d converter.
In a preferred embodiment of the present invention, described hardware system also comprises bluetooth communication module, and described bluetooth communication module is electrically connected with described Master control chip.
The invention has the beneficial effects as follows: portable electronic balance of the present invention is rational in infrastructure, volume is little, easy to carry, its hardware system is made up of Master control chip and the LOAD CELLS, amplifying circuit, A/D converter, LCDs and the usb interface module that are electrically connected with described Master control chip, accurate measurement, fast, integrate quality weighing function and calculation of price function, and can be connected with external printer, printing function is provided.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of portable electronic balance one of the present invention preferred embodiment;
In accompanying drawing, the mark of each parts is as follows: 1, Master control chip, and 2, LOAD CELLS, 3, amplifying circuit, 4, A/D converter, 5, LCDs, 6, usb interface module, 7, blue face communication module.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of portable electronic balance, comprise cabinet and the stainless steel scale pan being embedded in described cabinet opening surface, described portable electronic balance connects external printer by usb interface module 6, described portable electronic balance comprises hardware system, its hardware system is by Master control chip 1, and the LOAD CELLS 2 to be electrically connected with described Master control chip 1, amplifying circuit 3, A/D converter 4, LCDs 5 and usb interface module 6 form, described LOAD CELLS 2 adopts electromagnetic force balance sensor, described electromagnetic force balance sensor is a kind of High Precision Strength Measurement Sensor, the main measuring error of current electronic balance is the error having temperature to cause, variation of ambient temperature and sensor heating itself have an impact to the magnetic induction density of permanent magnet, electromagnetic force balance sensor relies on the electromagnetic force that produces in Constant Direct Current magnetic field of current-carrying coil and is realized being changed by the electric signal of mass metering by the gravitational equilibrium of mass metering, through amplifying circuit 3, signal is amplified again, then by A/D converter 4, amplifying signal is transformed into corresponding digital signal, finally show in LCDs 5.
Wherein, described LCDs 5 adopts LED backlit display, provides the optimum visibility under multiple applied environment, no matter use at indoor or outdoors, and all clear readability of display result.
Described A/D converter 4 adopts integral a/d converter, and its conversion accuracy is high, and cost is low, and antijamming capability is strong.
Described hardware system also comprises bluetooth communication module 7, and described bluetooth communication module 7 is electrically connected with described Master control chip 1.Described portable electronic balance is connected with external smart mobile phone by described bluetooth communication module 7, is transferred to by weighing data in smart mobile phone and carries out preserving or analyzing.
Present invention is disclosed a kind of portable electronic balance, rational in infrastructure, volume is little, easy to carry, its hardware system is made up of Master control chip and the LOAD CELLS, amplifying circuit, A/D converter, LCDs, usb interface module and the bluetooth communication module that are electrically connected with described Master control chip, accurate measurement, fast, integrate quality weighing function and calculation of price function, and can be connected with external printer or smart mobile phone, printing function or data-transformation facility are provided.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.