Electronic Suspension Scale is a device that uses sensors and electronic circuits to measure the weight of an object in a suspended state. Its working principle combines mechanical sensing technology, electronic signal processing, and digital display technology. The following is a detailed analysis of its core operating mechanism:

1、 Core structure and sensor principle

Load cell

The core of an electronic suspension scale is a strain gauge sensor, usually composed of a metal frame and metal wire strain gauges attached to it. When the sensor is subjected to vertical pressure, the metal frame undergoes slight deformation, causing the metal wire of the strain gauge to expand and contract, resulting in a change in resistance value.

Signal Conversion

The resistance change of the strain gauge is converted into an electrical signal. This signal is measured through a Wheatstone Bridge circuit, which generates a small voltage proportional to the pressure when the bridge is unbalanced. After being amplified by an amplifier, the voltage is converted from an analog signal to a digital signal by an analog-to-digital converter (ADC).

2、 Electronic Circuits and Data Processing

Signal processing flow

Amplification and filtering: The amplified signal is passed through a filtering circuit to remove noise interference.

Analog to digital conversion: ADC converts analog signals into digital signals for easy processing by microprocessors.

Calculation and compensation: Microprocessors (or digital signal processors, DSPs) filter, temperature compensate, and perform nonlinear correction on signals to improve measurement accuracy.

Display and output

The processed digital signal displays the weight value through a liquid crystal display (LCD) or digital tube, and some models also support data interfaces (such as RS-232, USB) to transmit data to a computer or printer.

3、 Mechanical Structure and Calibration

Load bearing system

The mechanical structure of an electronic suspension scale includes a scale pan, a scale body, a hook, and a sensor mounting seat. The scale pan is suspended by a hook, and the sensor is located between the hook and the scale body to ensure accurate transmission of force values.

Calibration and maintenance

Regular calibration: Use standard weights for calibration to ensure measurement accuracy meets regulatory requirements.

Environmental adaptation: Sensors need to be temperature compensated to avoid errors caused by changes in environmental temperature.

4、 Technical advantages and application scenarios

Technical advantages

High precision: The resolution can reach 0.01kg, suitable for precision weighing.

Portability: Small size, light weight, easy to carry to different work sites.

Reliability: No moving parts, long lifespan, low maintenance costs.

Typical applications

Logistics warehousing: lifting and weighing of goods, inventory counting.

Manufacturing industry: raw material hoisting and batching, finished product outbound weighing.

Agriculture: Hanging feed weighing, agricultural product lifting and grading.

5、 Summary of Working Principles

The electronic suspension scale converts mechanical signals (pressure) into resistance changes through strain gauge sensors, amplifies, converts, and calculates them through electronic circuits, and finally outputs weight values through digital display. Its essence is to indirectly calculate the mass of an object by measuring the changes in electrical parameters generated by sensor deformation.

6、 Safety operation standards

Avoid overload: It is strictly prohibited to exceed the rated load to prevent sensor damage.

Stable environment: Avoid using in environments with strong vibrations or electromagnetic interference.

Regular maintenance: Clean the scale body, check the status of sensors and connecting wires.

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