What is the weighing principle of the electronic weighing instrument?

Nowadays, more and more people are using electronic scales, such as vegetable and fruit vendors on the street, supermarkets, factories, etc., all of which are using electronic scales. Everyone can use them well, but do you know that the principle of electronic scales is What? Is it not clear why? Here is a brief introduction to what is the weighing principle of electronic weighing?

What is the weighing principle of the electronic weighing instrument?

One category: according to the working mode can be divided into mechanical scales (scales), electronic display scales, automatic metering system. According to the use mode can be divided into case scales, platform scales, small scales, electronic truck scales, direct display crane scales, wireless digital crane scales, quantitative packaging systems. According to the function can be divided into, weighing scales, counting scales, pricing scales.

The second system consists of: sensor circuit; A/D circuit; single-chip circuit; display circuit; keyboard circuit; output interface circuit; power supply circuit;

Three-sensor circuit: It is a function conversion device that converts non-electricity (pressure, torque, temperature, humidity, photosensitive) into electricity (current, voltage). Working principle: the external force causes the elastic beam of the sensor to deform, and the strain gauge attached to the elastic beam also prevents the change. The four strain gauges are connected to the bridge measuring circuit. Under the action of the excitation voltage, The output signal also undergoes a proportional change (charge). The accuracy of the sensor directly affects the accuracy of the weighing.