As the core equipment of industrial weighing, the sensitivity of electronic suspension scales directly determines the measurement accuracy and reliability. The following systematically analyzes the key factors and coping strategies that affect sensitivity from five dimensions:
1、 Environmental factors
Temperature and humidity interference
High/low temperature: When the temperature exceeds the working range of the equipment (usually -10 ℃~40 ℃), the thermal expansion and contraction of the sensor material cause zero drift.
High humidity: unsealed sensors are susceptible to corrosion or leakage in humid environments, resulting in a sensitivity decrease of over 1%.
Electromagnetic and signal interference
Interference from devices on the same frequency: When multiple wireless suspension scales work in parallel, the signals interfere with each other and the data fluctuates significantly.
2、 Mechanical Structure and Sensor Design
Unbalanced load and installation deviation
When the object is not aligned with the center of the hook, the lateral force causes non-linear errors in the sensor output, resulting in decreased repeatability.
Improper assembly (such as non coplanar membrane fixing surfaces) can cause force diversion, resulting in a sensitivity loss of over 5%.
Sensor type characteristics
Capacitive sensor: Although it has strong anti-interference ability, the distributed capacitance is greatly affected by temperature and requires software compensation for nonlinear errors.
Strain gauge sensors: susceptible to humidity erosion leading to increased creep and poor long-term stability.
3、 Circuit and Signal Processing
Stability of oscillation circuit
The inductance and distributed capacitance in the LC circuit vary with temperature and humidity, causing zero point jitter.
Time reference error: The temperature drift of inferior crystal oscillators directly affects the accuracy of frequency measurement.
Defects in digital processing
The low resolution ADC module cannot capture small weight changes and has a delayed dynamic response.
4、 Usage and Maintenance Standards
operational error
Overrange use leads to plastic deformation of the sensor and a decrease in sensitivity.
Impact loading (such as heavy objects falling) causes fatigue of the elastic body, making zero point reset difficult.
Lack of regular calibration
Failure to calibrate according to the cycle (recommended 3-6 months) leads to an increase in error due to accumulated mechanical wear.
Neglecting battery voltage monitoring (wireless model), insufficient transmission power under low voltage conditions, and intermittent signals.
Improving the sensitivity of electronic suspension scales requires systematic control: priority should be given to using sealed and moisture-proof sensors with temperature compensation; Optimize installation process to ensure vertical alignment; Develop periodic calibration plans and record data; Implement signal isolation measures for wireless models. Through full lifecycle management, sensitivity errors can be controlled within ± 0.1% to ensure accurate and reliable industrial weighing.