New ultra-high precision electromagnetic electronic balance

Abstract

The invention relates to a new ultra-high precision electromagnetic electronic balance. The electronic balance comprises a scale pan arranged at an upper end of a wind cap casing, wherein the scale pan is fixed on a bracket, a lower portion of the bracket is equipped with a sensor assembly arranged in the wind cap casing, the sensor assembly includes a support, a magnetic steel, magnetic poles anda coil, a lower portion of the bracket is equipped with a bubble balancing instrument, the bubble balancing instrument is connected with the magnetic steel mounted in the wind cap casing through a connection rod, the connection rod is sleeved with the magnetic poles of which bottom portions are in contact with an upper surface of the magnetic steel and the coil of which a bottom portion is in contact with upper surfaces of the magnetic poles, an outer side of the magnetic steel is sleeved with a seat sleeve composed of a magnetic steel sleeve and a magnetic steel base, and a lower portion ofthe seat sleeve has a bottom plate. The electronic balance is advantaged in that performance of an electromagnetic balancing sensor is improved, production cost is reduced, and stability and accuracyof the electromagnetic balancing sensor are improved.

Description

technical field [0001] The invention relates to the field of electronic instruments, in particular to a novel ultra-high-precision electromagnetic electronic balance. Background technique [0002] People call a balance that uses electromagnetic force to balance the gravity of an object to be called an electronic balance. It is characterized by accurate and reliable weighing and fast and clear display, and has automatic detection system, simple automatic calibration device and overload protection device. Electronic balance is used to weigh the mass of objects. Electronic balances generally use electronic instruments of strain gauge sensors, capacitive sensors and electromagnetic balance sensors. Strain sensor has simple structure and low cost, but its accuracy is limited. Before 2009, high precision cannot be achieved; capacitive sensors have fast weighing speed and high cost performance, but they cannot achieve high precision; electronic balances using electromagnetic bal...

AI Technical Summary

Problems solved by technology

In fact, the gap between the magnetic steel is 2mm, the error is 0.02mm, the inner and outer wall thickness of the coil is 1.5mm, the error is 0.02mm, and there will be deviations between the magnetic pole and the AlNiCo and the magnetic steel sleeve, and the coil wall thickness will also be uneven; in fact, the coil is installed The ideal gap in the magnetic steel is only 0.1~0.2mm

[0005] Due to the above reasons, most domestic manufacturers of electromagnetic balance sensors and electronic balances are difficult to ensure that the gap is 100% correct when producing electromagnetic balance sensor coils and magnetic steel installations.

Seriously hinders the application of electromagnetic balance sensors in higher precision electronic balances

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